Shear Band Deformation Research Articles

Mechanical responses and crystal plasticity model of CoCrNi medium-entropy alloy under ramp wave compression

It is of substantial scientific significance and practical value to reveal and understand the multiscale mechanical properties and intrinsic mechanisms of medium-entropy alloys (MEAs) under high strain rates and pressures. In this study, the mechanical responses and deformation mechanisms of an equiatomic CoCrNi MEA are investigated utilizing magnetically driven ramp wave compression (RWC) with a strain rate of 105 s−1. The CoCrNi MEA demonstrates excellent dynamic mechanical responses and yield strength under RWC compared with other advanced materials. Multiscale characterizations reveal that grain refinement and abundant micromechanisms, including dislocation slip, stacking faults, nanotwin network, and Lomer–Cottrell locks, collectively contribute to its excellent performance during RWC. Furthermore, dense deformation twins and shear bands intersect, forming a weave-like microstructure that can disperse deformation and enhance plasticity. On the basis of these observations, we develop a modified crystal plasticity model with coupled dislocation and twinning mechanisms, providing a relatively accurate quantitative description of the multiscale behavior under RWC. The results of simulations indicate that the activation of multilevel microstructures in CoCrNi MEA is primarily attributable to stress inhomogeneities and localized strain during RWC. Our research offers valuable insights into the dynamic mechanical responses of CoCrNi MEA, positioning it as a promising material for use under extreme dynamic conditions.

Anisotropic compression response of functionally gradient syntactic foam comprising of fly ash cenosphere and polyurethane

A novel functionally gradient (FG) syntactic foam with hierarchical cell structure was prepared by incorporating fly ash cenosphere of different size distribution into rigid polyurethane foam (PUR). The mechanical anisotropic behavior was experimentally studied by axial and traverse compression, and the influence of density gradient on failure mechanism was discussed through digital image correlation (DIC) technique. Results shown that the density graded (GD) syntactic foam produced stepwise stress strain response under axial compression, but failed by global shear pattern under traverse compression. The plateau stress of layered density (LD) syntactic foam gradually increased under both compression modes. The mechanical anisotropic property of FG syntactic foam was much smaller than that of functionally gradient aluminum foam. Failure mechanism of FG syntactic foam under axial compression was mainly controlled by the compression strain band generated in low density layers, and the deformation band successively extended to high density region. Under traverse compression, the material interfaces in LD foam significantly affected the propagation of shear deformation bands generated in high density layers, producing more short-range interpenetrating shear bands. The layered density gradation shown great potential in decreasing the anisotropic characteristics of syntactic foams. These findings can provide a valuable guide for designing and optimizing the impact resistance of functionally gradient foams.

Investigation on mechanical properties of Ti-6Al-4 V multilayer micro-lattice biomaterials under dynamic compression loading

Novel skull repair Ti-6Al-4 V multilayer micro-lattice biomaterials (MMBs) proposed recently have promising application in clinical practice. Herein, the dynamic compression performances of MMBs are concerned and investigated by Split Hopkinson Pressure Bar (SHPB) system and finite element (FE) methods. Typical shear band, strut yielding and damage deformation modes of MMBs are characterized by FE and SHPB experiment. Through density gradient regulation, deformation mode of MMBs is transformed from shear band to localized collapse pattern. It is interesting that MMBs with different unit cell sizes exhibit different strain rate sensitivities. For strain rate-insensitive MMBs (BCC(3), BCC(5) and BCCZ(3)), the influence of relative density on strength shows a linear increasing trend under both low and high strain rates. For strain rate-sensitive ones (BCC(7), BCCZ(5) and BCCZ(7)), the influence of relative density on strength under low strain rate is stronger than that under high strain rate. The strength range of MMBs matches skull/bone materials well under same loading strain rate. This work not only reveals dynamic mechanical properties of MMBs but also has enlightenment for investigating dynamic properties of porous metamaterials.

Grain refinement mechanism in chip and the machined subsurface during high-speed machining of Inconel 718 alloy

Microstructural defects on the machined surface of Inconel 718 alloy can be a significant source of fatigue cracks, potentially leading to failures of the structural components of aerospace engines. This work focused on the grain refinement mechanism induced by the dynamic recrystallization (DRX) behavior in both the chip and machined subsurface during high-speed machining (HSM) of Inconel 718 alloy. Multiscale metallurgical observations were conducted using electron backscatter diffraction (EBSD), transmission electron microscopy (TEM), and precession electron diffraction (PED) to characterize the crystal structures, including the grain size, grain boundary distribution, dislocation density, and grain orientation distribution. Finite element (FE) simulations were performed to obtain the strain, strain rate, and cutting temperature to analyze the microstructure evolution mechanism under the effect of severe deformation conditions in HSM. The results indicate that grain refinement in the chip primarily occurs in the shear band and secondary deformation zone. The primary cause of the variation in the final grain size is attributed to the distinct thermomechanical loading conditions experienced by the material. The microstructure observed in the machined subsurface reveals a significant gradient distribution, characterized by the presence of an amorphous structure, nanocrystallites, refined grains, and elongated grains along the depth direction. The equiaxed ultrafine nanocrystals observed in the machined near-surface result from both continuous DRX (cDRX) and discontinuous DRX (dDRX) mechanisms. In the deeper zone, the presence of numerous subgrains and a high geometrically necessary dislocation (GND) density reaching up to 1016/m2 within the grains indicate that the refined grains in this zone result from the cDRX mechanism. The variation in DRX mechanisms observed in the machined subsurface are closely related to the gradient distribution of the thermomechanical load generated in HSM.

Effect of Strain Per Pass on Microstructure and Mechanical Properties of Multi-Axially Forged Cast AA5083 Alloy at Room Temperature

This paper investigates the effect of strain per pass over a cycle on, multi-axially forged cast AA5083 alloy at room temperature. To begin with, Multi-Axial Forging (MAF) with two different strains per pass was imposed on the alloy without changing the die geometry. Samples were deformed to cumulative strains of Σɛ = 2.46 (2 Cycles) and Σɛ = 2.79 (3 Cycles), with two different strains per pass ε = 0.41 and ε = 0.31 respectively. Microstructural analysis was carried out by using OM, XRD, and SEM with EDS. Structural changes were characterized, and it was revealed that grain fragmentation was caused by the frequent development of deformation and micro shear bands, which was followed by the evolution of new fine grains in the original grain structure. Mechanical properties were evaluated by tensile, and hardness tests. MAF of ɛ = 0.41 per pass results in high tensile strength and hardness, 428 MPa and 147 Hv; respectively at a cumulative strain of Σɛ =2.46. Processing with strain ɛ = 0.31 per pass produced strength of 380 MPa and hardness of 131 HV after cycle III with a cumulative strain of 2.79. MAF of strain ɛ = 0.41 per pass with cumulative strain of 2.46 resulted in a higher grain refinement structure with increased strength compared to a strain of 0.31 per pass with a cumulative strain of 2.79. Therefore, with the imposition of the high strain per pass produced more grain refinement and consequently higher strength.

Concurrence of load-and-flame structures, balls-and-pillows, clastic injectites and shear deformation bands as indicator of seismicity in mixed siliciclastic-carbonate successions (Finale Ligure Basin, Italy)

The present research explores a diverse suite of soft sediment deformation structures (SSDS) combined with clastic dykes and shear deformation bands distributed throughout a Early Miocene-age mixed carbonate-siliciclastic coastal wedge located on the Ligurian coast (NW Italy) of the Mediterranean region. The studied Aquitanian-Serravallian successions of the Finale Ligure Basin are typified by the presence of lithologically heterogeneous units, internally characterized by abrupt changes of lithofacies distributions and associated interpreted depositional environments. The interface between the terrigenous base and the carbonate wedge in many places features SSDS. Here, we report the discovery of a multiform deformational pattern, ranging from small size (cm-to dm-scale) load-and-flame structures, ball-and-pillows and mini-slumpings, to outsized (several meters in height) chaotic contorted and folded stratigraphic intervals, sand intrusions and diapir- or tree-like water escape structures. Many of the SSDS are related to fast injection of overpressurized fluids after sand liquefaction, and occur in close association with disaggregation and phyllosilicate shear bands, and sand dykelets. The stratigraphic distribution and cyclic repetitions of SSDS-prone intervals unambiguously indicates syn-depositional seismicity, thus suggesting that juxtaposition of SSDS, diapiric injectites, and shear deformation bands can serve as a suitable diagnostic criteria for seismite identification in the field. Since these particular assemblages of deformation structures reflect seismic activity in the area, they provide compelling evidence for previously undocumented tectonic episodes in Langhian-Serravallian times, associated with the latest stages of the Liguro-Provençal Basin opening.

Unveiling slip/nanotwin/nano shear band deformation mechanisms at the copper side in a roll-welded aluminum/copper couple

In this study, the co-deformation behavior of Cu in an Al-Cu couple was evaluated. It is observed that slip, twinning, and partial shear banding were responsible for deformation in Cu during cold welding. For characterization purposes, transmission electron microscopy (TEM) was employed to detect deformation mechanisms after the rolling. It was demonstrated that the formation of nanotwins could have evidently influenced the microstructure of the Cu side. The junction of twin/twin, twin/slip, and twin/shear bands was another major observation and confirmed complex microstructure during rolling. Also, the resulting co-deformation has a noticeable effect on microhardness as compared to the aluminum side. Moreover, the textural investigations were conducted by the X-ray diffraction (XRD) and electron back-scattered diffraction (EBSD) methods after rolling. Textural investigations exhibited a transition from Cube to rolling texture (mainly Brass) and shear (Rotated Cube) textures. For validation of shear deformation texture in Al-Cu, a finite element method (FEM) was employed, and approved experimental textural studies regarding shear texture formation.

Evolution of hot processing map and microstructure of as-forged nickel-based superalloy during hot deformation

Nickel-based superalloy has excellent mechanical properties at high temperature. However, the high deformation resistance, narrow deformation temperature range and complex microstructure evolution of the alloy bring great challenge to the plastic deformation of the alloy. The microstructure evolution and hot deformation behavior of as-forged nickel-based superalloy were examined through thermal compression tests at 950–1150 °C and strain rates of 0.001–10 s−1 with true strain of 1.0. The stress-strain curve exhibited a yield stage under small strain, and it comprised dynamic recovery (DRV) and dynamic recrystallization (DRX) two types. Strain rate sensitivity (m) and power dissipation efficiency (η) were calculated, and hot processing map was generated in accordance with the Murty criterion, and the rate of strain and the temperature of deformation were obtained as 1100–1150 °C and 0.02–0.4 s−1, separately, based on the optimal hot processing parameters. The instability zone was primarily in the zone of high strain rates. As the temperature of deformation was risen or the rate of strain was decreased, the DRX grain size was increased, as indicated by the microstructure results. The main deformation mechanism varied from DRX to DRV, and, then to the shear band (SB), deformation band (DB), and flow localization (FL) as η was decreased. Moreover, continuous dynamic recrystallization (CDRX) at subgrains rotation and discontinuous dynamic recrystallization (DDRX) at grain boundaries were identified during thermal deformation.

Atomistic investigation of the mechanical and tribological responses of the ferrite-cementite interface with a Bagaryatskii orientation

The excellent tribological properties of pearlitic steel can be tracked to the synergistic effect between ferrite and cementite phases. However, owing to the lack of full understanding of the plastic carrier-interface interaction mechanism, the essential role of the interface in the mechanical and tribological response is indistinct. In this study, the deformation response of cementite/ferrite (Fe3C/α-Fe) interface under a mechanical load was explored by leveraging molecular dynamics simulation. The results showed that the Fe3C/α-Fe interface significantly hinders the shear deformation propagation and can effectively relax the strain/stress concentration. With the increasing indentation depth, the cementite phase undergoes an amorphous transformation and rejuvenation, and the ferrite phase undergoes a phase transformation to HCP, thus synergistically enhancing the plasticity of pearlite. On this basis, we revealed the underlying origin for the decreased growth rate of friction coefficient with the increasing friction depth. In particular, the tribological properties change periodically in the scratch direction due to the effect of interfacial dislocations, and the friction mechanism is also affected by the interfacial dislocation structure, showing a dendritic shear banding deformation. Our work is a step forward in understanding the relationship between the Fe3C/α-Fe interface and the micro-mechanism of friction.

Characterization of Plastic Deformation in CuZr Metallic Glasses Subjected to the Rolling Process

Using the rolling process, it is possible to induce multiple shear bands in the microstructure of metallic glasses (MGs) and improve the overall plasticity in the subsequent mechanical loadings. Hence, it is crucial to understand the mechanism of shear banding and plastic deformation under the rolling process. In this work, molecular dynamics (MD) simulation was applied to evaluate the formation and generation of shear bands in a CuZr MG under cold- and hot-rolling processes. Based on the results, it is found that the shear bands are formed with secondary branches in the cold rolling, while the shear events are scattered in the bulk of material in the hot rolling. Considering Voronoi analysis, it is revealed that the hot rolling is accompanied by the recovery of crystalline-like clusters provided that rolling process continues for subsequent passes. On the other hand, the cold-rolled sample shows a stable behavior in the evolution of crystalline-like clusters; however, the population of main icosahedral polyhedrons decreases in the system.

Development of irreversible deformation and localized shear bands under horizontal compression of the sedimentary layer

Within the framework of the elastoplastic model, the development of irreversible deformation during horizontal compression of a sedimentary layer lying on a rigid foundation is considered. The influence of strength parameters of the medium and friction in the base on the configuration of plasticity zones and localization of deformation has been studied. Analytical estimates are made of the depths at which irreversible deformation develops, as well as their changes as a result of an increase in horizontal stresses. With the help of numerical simulation, the features of the origin and development of localized shear bands are shown. Schemes are constructed illustrating the nature of the development of localization bands depending on the properties of the medium.

Static recrystallization behavior of the cold-rolled Mg-1Al-1Zn-0.1Ca-0.2Y magnesium alloy sheet

In this study, we investigated the static recrystallization behavior and basal texture change from rolling direction (RD)-split (c-axes of grains toward the RD) to transverse direction (TD)-split (c-axes of grains toward the TD) of the cold-rolled Mg-1Al-1Zn-0.1Ca-0.2Y (AZXW1100) alloy during annealing. The cold-rolled AZXW1100 alloy sheet contained highly deformed shear bands (SBs), corresponding to 58 % of the total area, which caused rapid recrystallization at the beginning of annealing. The fine recrystallized grains nucleated in the SBs, and the intersection of the twins grew larger while consuming the deformed matrix grains, which did not recrystallize even at the late stage of annealing and were consumed by the surrounding recrystallized grains nucleated on the SBs. Owing to the difference in the recrystallization initiation time between the SB and deformed matrix grains, the recrystallized grains nucleated in the SBs guided the overall recrystallization behavior. Additionally, quasi-in-situ electron backscattered diffraction analyses clearly showed that among the recrystallized grains nucleated at the SBs, the grains with TD texture components became larger through preferential growth, whereas those with RD texture components did not grow and disappeared. Owing to this preferential grain growth, the texture intensity in the RD decreased and that in the TD was maintained, resulting in the formation of a diamond-like or TD-split texture. In this study, the co-segregation of Al, Zn, and Ca atoms along the grain boundaries and the formation of nanoscale Al8Mn5 particles were found to reduce boundary mobility and, consequently, hinder grain growth. These results can explain the texture change from a strong RD-split to a weak TD-split during annealing.

Strain partitioning in a dual-phase steel under plane strain compression

Modern design of steels with improved mechanical properties is often based on multiphase microstructures such as in dual-phase steels. The tailoring of these alloys requires a thorough understanding of strain partitioning and the correlation of strain related phenomena in different scales and under different loading paths. These questions are usually addressed by means of empirical techniques and numerical simulations using representative volume elements (RVE). The assessed loading conditions are most often simple shear, uniaxial tension, and hole expansion and these studies mainly focus on microstructural damage progression under low strains. This study aims to develop a coupled experimental-numerical approach to examine the fractal nature of strain partitioning in a dual-phase steel (DP600) under plane strain compression. This deformation path allows the achievement of significantly higher strains up to the extension of possibly promoting grain fragmentation within highly deformed shear bands. From a fractal perspective, it is demonstrated the development of micro-scaled shear bands due to microstructural heterogeneities within macro-shear bands characteristic of plane strain compression. Additionally, the results obtained from the 2D-RVE model were critically examined and compared with several experiments at different scales to provide further understanding on the limitations and capabilities of the approach.

Morphology and Structure of Brass–Invar Weld Interface after Explosive Welding

This paper presents the results of a study of the morphology and structure at the weld interface in a brass-Invar bimetal, which belongs to the class of so-called thermostatic bimetals, or thermobimetals. The structure of the brass-Invar weld interface was analyzed using optical microscopy and scanning electron microscopy (SEM), with the use of energy-dispersive X-ray (EDX) spectrometry and back-scattered electron diffraction (BSE) to identify the phases. The distribution of the crystallographic orientation of the grains at the weld interface was obtained using an e-Flash HR electron back-scatter diffraction (EBSD) detector and a forward-scatter detector (FSD). The results of the study indicated that the weld interface had the wavy structure typical of explosive welding. The wave crests and troughs showed the presence of melted zones consisting of a disordered Cu-Zn-Fe-Ni solid solution and undissolved Invar particles. The pattern quality map showed that the structure of brass and Invar after explosive welding consisted of grains that were strongly elongated towards the area of the highest intensive plastic flow. In addition, numerous deformation twins, dislocation accumulations and shear bands were observed. Thus, based on the results of this study, the mechanism of Cu-Zn-Fe-Ni structure formation can be proposed.

Effect of stress triaxiality on plastic deformation of metallic glasses

Aiming at fabrication of cellular metallic glasses with high mechanical properties, double edge notched samples were designed by orthogonal design method. Compressive tests on those samples were carried out to investigate mechanical responses induced by different notch settings. It was found that the notch tip distance and stress triaxiality are two key factors controlling yield strength and plasticity of notched samples. Besides, free volume theory factoring in hydrostatic stress was incorporated into finite element model to simulate shear band (SB) deformation process for different samples. Combined with experiments, simulations as well as microstructure observations, it was concluded that the notch tip distance effect could be ascribed by transition process between sparsely-intersected and densely-intersected SBs, and the later is the key to plasticity enhancement. Additionally, large stress triaxiality could improve the global plasticity by introducing densely-intersected SBs so as to hinder sample from fracturing along one major SB. The current work could offer useful data in providing direct evidence on fabrication of cellular materials as well as enriching shear band formation mechanism of monolithic metallic glasses.

Enhancement of ballistic performance enabled by boron-doping in subzero-treated (ferrite+austenite+martensite) triplex lightweight steel

Investigations of dynamic deformation and ballistic performance of ultra-high-strength lightweight steels for steel armor applications have not been conducted to date. In this study, effects of boron(B)-doping on ballistic performance were explored in subzero-treated Fe-0.3C-9Mn-5Al and Fe-0.3C-9Mn-5Al-0.005B (wt%) lightweight steels in relation to band structures and B segregation. The dynamic deformation and adiabatic shear band (ASB) formation behaviors were examined by a Hopkinson pressure bar (SHPB). The band structure is critical in inhibiting ASB propagation, as it is continuously blocked at tempered-martensite/ferrite boundaries. The crack propagates along the embrittled ASB and penetrates into tempered-martensite/ferrite boundaries, producing delamination of elongated grains in the undoped steel. On the other hand, the delamination does not occur in the B-doped steel because the segregation of solute B at prior austenite grain boundaries enhances the grain-boundary cohesion. Thus, the B-doped steel outperforms conventional rolled homogeneous armor steels and the undoped steel as well, providing a significant deal of potential for developing excellent ballistic-performance lightweight steel armors.

Hardening and toughening effects of intermediate nanosized structures in a confined amorphous alloy film

• Intermediate nanosized structure (termed as “nano shear bands” (NSBs)) between microscopic shear transformation zones (STZs) and macroscopic shear bands (SBs) was observed in the crystalline-layer confined amorphous (CLCA) NiW alloy films. • NSBs promoted multiple and controlled shear banding deformation, hence leading to the enhanced crystallization. • NSBs possessed both hardening and toughening effects for the CLCA films. The plastic deformation of amorphous alloys is well known to be localized into shear bands (SBs), which are believed to stem from the atomic-scale flow defects, i.e., shear transformation zones (STZs). Yet, the bridge between the mesoscopic SBs and the atomic-scale STZs remains poorly understood. In this work, through thermally activating pronounced β relaxations in the well-designed crystalline-layer confined amorphous (CLCA) NiW alloy films, we experimentally captured and observed an intermediate nanosized structure termed as “nano shear bands” (NSBs) with a typical size of 1–2 nm in thickness and 5–10 nm in length. The influences of such NSB structures on the macroscale deformation behavior were systematically investigated. It was found that NSBs lead to both hardening and toughening effects for the CLCA films, as they promote multiple and controlled shear banding deformation, which results in enhanced crystallization. The intermediate NSB structure could connect the microstructural characteristics and macroscopic plasticity in amorphous alloys and may provide new insights for understanding the microscopic deformation mechanism of amorphous alloys as well as tuning/designing their properties.

Recrystallization Behavior of Warm Rolling and Cold Rolling Cr-Ti-B Steel during Annealing

To study the nucleation and recrystallization behavior of deformation bands, shear bands and grain boundaries during the recrystallization process, a heat treatment test was carried out on Cr-Ti-B low-carbon steel after warm rolling and cold rolling. The results show that recrystallization occurs preferentially in shear bands and grain boundaries. The γ deformation texture can be enhanced and the Goss texture can be weakened during the warm rolling and subsequent cold rolling process. Recrystallization of the deformation bands was observed, but the nucleation time of recrystallization in the deformation band is much slower than that in the shear band and grain boundary.

The near-surface structure in the area of the Børglum fault, Sorgenfrei-Tornquist Zone, northern Denmark: Implications for fault kinematics, timing of fault activity and fault control on tunnel valley formation

Previous studies showed evidence that the Sorgenfrei-Tornquist Zone (STZ) in northern Denmark is seismically active and fuelled the demand for further analyses of the fault structure and its seismic hazard potential. We focus on the area of the Børglum fault, which represents the northern boundary fault of the STZ and extends at least 250 km from the western Baltic Sea across Jutland into the southeastern North Sea. The Børglum fault has previously been interpreted to represent a glacially-triggered fault. Two shear-wave reflection seismic sections were acquired to image the near-surface structure in the vicinity of the Børglum fault. Detailed insights into the acquisition, processing and interpretation of the seismic sections will be provided. The seismic sections indicate that the Børglum fault in the study area is not an isolated fault, but most likely represents a complex fault system with a strike-slip component. The fault interpretation is based on systematic vertical reflector offsets, the observation of steeply dipping thin transparent zones that separate the offset reflectors, abrupt lateral changes in the reflector pattern and in some cases, the presence of a fault shadow (a diffuse zone on a seismic section below a fault). This interpretation is mainly based on the identification of positive flower structures on the seismic sections, and supported by the presence of elongated sedimentary mini-basins and topographic depressions in the study area, which are partly interpreted to represent strike-slip basins. A WNW-ESE striking tunnel-valley system is imaged on the seismic sections. The spatial relationship between the faults and the tunnel valley suggests a fault-control on tunnel-valley system formation in this area. The seismic sections indicate that faults in the study area were probably active at the end of the Saalian glaciation (MIS 6). In addition, soft-sediment deformation structures and shear-deformation bands developed in Late Pleniglacial to Lateglacial sediments point to repeated phases of fault activity. The reflector pattern on one of the seismic sections indicates that a major fault nearly reaches the Earth's surface. A step in the topography above the fault probably represents a fault-scarp. Because the ongoing glacial-isostatic adjustment will lead to a change in the stress magnitude in this area, future movements along the faults are possible.

Research on dynamic mechanical properties and plastic constitutive relation of Ti3Al intermetallic compounds under mechanical-thermal coupling

Ti3Al intermetallic compounds is a lightweight, high-temperature resistant rare aerospace materials, whose dynamic mechanical properties concern the accuracy of simulation analysis and further development in material manufacturing. To obtain the plastic constitutive relation of Ti3Al under the action of mechanical-thermal coupling, material rheological behavior was investigated by using the separation Hopkinson pressure bar (SHPB) system with a high-temperature synchronous assembly. Meanwhile, the Johnson-Cook plastic constitutive model was calculated and modified by introducing strain compensation and adiabatic temperature rise at the range of strain rate of 0.001–6500 s−1 and deformation temperature of 293–1173 K. Furthermore, the microstructure evolution of Ti3Al fracture surface morphology was discussed. Experimental results showed that the flow stress had a weak positive strain rate enhancement effect, significant negative temperature thermal softening effect and strain rate plasticizing effect. Adiabatic temperature rise was accompanied by the high strain rate, and its value increased exponentially with the strain rate. The adiabatic deformed shear band (ADSB) appeared at an edge of 45° along the loading direction at the strain rate 4500 s−1 and the deformation temperature 273 K, respectively. ADSB tended to expand internally along with the strain rate and evolved into an adiabatic transformed shear band (ATSB) when the temperature rose to 973 K. The maximum relative errors in the modified J-C model at the high strain rate and the room temperature, the high strain rate and the high temperature were 3.11% and 14.91%, respectively. Consequently, the modified J-C model described in dynamic mechanical properties of Ti3Al was more accurate than the conventional J-C model.