High Strength Aluminum Alloy Research Articles

Effect of heat treatment on the properties of rapidly quenched Al – Ge – Si alloys

This paper examines Al – Ge – Si alloys containing up to 40 wt.% germanium that can potentially be used for brazing corrosion resistant steels to highstrength aluminium alloys. Using ultrarapid quenching, ingots of the abovealloys were converted into 55±5 μm thick bands. Properties of both ingots and bands were methodically studied, and effect of heat treatment on the properties of ingots and bands – determined. Optimal regimes of heat treatment for bands were tested that help achieve the required plasticity. Homogenous and heterogenous materials were brazed together. X-ray phase analysis and electron microscopy showed that rapidly quenched bands have a homogenous structure and contain a eutectic comprised of solid solutions (Al, Ge) and (Si, Ge) and a metastable compound Al6Ge5. The ingots of the alloys consist of two eutectics. The first one consists of solid solutions (Al, Ge) and (Si, Ge), while the second one comprises a solid solution (Al, Ge) and a Ge-based solid solution. The bands have a nanocrystalline structure. Having measured microhardness and plasticity of the bands, the authors identified the best regime of heat treatment, which is 300 oC/10 min. A series of pilot tests was conducted to analyze the applicability of the studied alloys as filler metals. For this, aluminium alloy AA6082 was brazed to corrosion resistant steel AISI 304 and a heterogenous joint was made. A metallographic study revealed no compromized integrity or defects in any of the brazed joints.«Funding: The reported study was funded by RFBR and DFG, project number 21-52-12026».

Directed energy deposition of AA7075 - Effect of TiC nanoparticles on microstructure

AA7075 alloy is a high-strength aluminum alloy with properties enhanced by heat treatments. However, like most high-strength aluminum alloys, AA7075 is non-weldable, as it suffers from hot cracking when it is welded or additively manufactured with fusion techniques. A proposed way to reduce the hot cracking tendency is by refining the microstructure by adding nucleation enhancers. In this study, AA7075 powder feedstock was functionalized with 1.7 and 3.4 vol% TiC nanoparticles, printed with laser-directed energy deposition (DED), subjected to T6 heat treatment, and characterized with optical and electron microscopy, electron backscatter diffraction (EBSD), and hardness measurements. Although TiC was not homogeneously distributed in the aluminum matrix, the addition of TiC successfully suppressed hot cracking by inhibiting dendritic growth produced by increased and more uniform nucleation, which resulted in refined equiaxed grains, and thus enhanced the printability of the material.

The Effect of Extrusion and Heat Treatment on the Microstructure and Tensile Properties of 2024 Aluminum Alloy.

Hot extrusion forming is one of the best cost-effective processing methods to obtain high-strength aluminum alloys. In order to obtain high performance 2024 aluminum alloy for the aero and automobile industries, this research comprehensively uses heat treatment and reverse isothermal extrusion technology to prepare 2024 alloy. The effects of homogenization, extrusion and post-extrusion annealing treatment on the microstructure and mechanical properties of 2024 aluminum alloy were discussed in detail. The results indicate that the grain refinement of the extruded alloy material is significant. The coarse eutectic microstructure at the grain boundaries was refined, and these grains tended to be uniformly distributed after the annealing treatment. Extruded 2024 aluminum alloy material mainly has S (Al2CuMg) and Al7Cu2Fe second phases. The appearance of a large number of S phases led to a significant improvement in the properties of the alloy with an increase in tensile strength and elongation of 176% and 547%, respectively. In addition, EBSD analysis showed a significant meritocratic growth in the extrusion direction with the appearance of Copper {112} <111> rolling weaving, which led to process hardening and the strength improvement of the alloy.

Environment-Induced Cracking of High-Strength Al-Zn-Mg-Cu Aluminum Alloys: Past, Present, and Future

Environment-induced cracking (EIC) during commercial use of aluminum alloys started over 125 y ago (mid-1890s), some 45 y earlier than previously documented, with earliest failures for Al-Zn-Mg-Cu, 7xxx series alloys occurring a decade later. Needs for lighter, thicker, and stronger alloy products, first driven by WW1 and WW2 militaristic requirements and subsequently by relentless demands from modern aircraft industry designers, resulted in major in-service EIC in commercial high-strength Al-Zn-Mg-Cu alloys in the United States and United Kingdom during the 1950s, 1960s, and 1970s. These were avoidable had research findings from France, Germany, and Japan from the 1930s and 1940s been implemented. Unprecedented U.S. Government R&D funding during the late 1960s, 1970s, and early 1980s led to AA7050 and similar alloys, that essentially eliminated EIC issues during commercial usage for several decades. EIC assessment for the following “new-generation” high-strength alloys relied totally on standard ASTM test methods, incapable of providing data directly relatable to the service conditions. Although EIC service issues for the latest generation of 7xxx series alloys remains manageable, the premature appearance of EIC requires a quantitative understanding of EIC initiation under environmental and mechanical conditions directly relatable to intended use, to prevent unexpected failures for future alloys. Directions for future high-strength 7xxx series aluminum alloy development and EIC assessment to provide quantitative data relatable to service conditions and input for structural design and for service life prediction are discussed.

Investigation on surface morphology and microstructure of double-wire + arc additive manufactured aluminum alloys based on spectral analysis

Double-wire + arc additive manufacturing has gained increasing attention due to the advantage of controlling alloy composition in real time. However, the control mechanisms of microstructure and mechanical properties of high strength aluminum alloys have not been revealed. To solve this problem, in-situ monitoring of double-wire + arc additive manufacturing process were carried out by the spectrograph and a visual sensor. The spectral signal and arc plasma characteristics under different wire feeding rate ratios were systematically studied. Combined with the high-speed photography results of the droplet transfer, it was found that spectral intensities of Mg I 517.26 nm represented abnormally high during the globular transfer process. Surface bulges with the size of about 100 μm were detected. In addition, the microstructure and phase composition of the deposited parts were characterized by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). The results indicated that the variation of electron temperature was consistent with the variation trend of Al2CuMg phase content under different processes. The intensity ratio IRMn/Mg of spectral line Mn I 407.92 nm to Mg I 517.26 nm was proposed to quantitatively measure the degree of phase transformation, which had a better performance than the spectral line intensity and electron temperature. Under the conditions of this research, the phase composition was α(Al) + θ(Al2Cu) + S(Al2CuMg) three-phase when the IRMn/Mg fluctuated around 0.59, and α(Al) + S(Al2CuMg) two-phase produced when the IRMn/Mg fluctuated around 0.35.

Effect of the Processing Parameters of Doping Lime, Calcium and Zinc of Aluminium Alloys Recovered from Scrap

The present work shows the effect of the processing parameters of separately doping lime, calcium and zinc on the properties of an aluminium alloy recovered from scrap. Two routes viz pyrometallurgy and powder metallurgy were involved the parameters displayed by the concentration of the alloying agents, time and temperature have ‎been studied. Results showed that powder metallurgy promotes a wide spectrum for doping the host alloy. The doping process of lime to the molten aluminium needs more time as compared to the zinc metal. A heterogeneous structure of the eutectic phase developed with lime or calcium gradually affects the mechanical properties of the Al ‎alloy. It decreased the density by 15.5 %, and increases its hardness to about 37 V. Calcium formed a eutectic phase Al4Ca at lower concentrations. The eutectic (Al)+Al4Ca of fine ‎structure and the particles of Al4Ca are capable of spheroidization during heat treatment at ≥ 500 ‎°С. The maximum hardness observed with lime-containing Al alloy gives a reason to expect a slight ‎increase in mechanical strength properties. In the powder metallurgy method, Al was prepared by ‎chemical ‎victimization ‎reducer hydrazine hydrate. The Al-Ca-Zn system is promising for the development of new ‎eutectic type high-strength aluminium alloys. With zinc, the pyrometallurgy is far more convenient as compared to powder metallurgy. Zinc is uniformly distributed between ‎aluminium solid solution and the intermetallic phases of the Al-Zn-Ca system.‎ The ‎activation energy of adding lime or calcium to the Al alloy amounts ‎to 27.533, ‎kJ/mol with a recovery potency of 98.7%. A process of annealing regenerated homogeneous structure when matched ‎ under a flux of ‎carbon/alkali mix.

The impact of Adjustable-Ring-Mode (ARM) laser beam on the microstructure and mechanical performance in remote laser welding of high strength aluminium alloys

This paper introduced the use of an adjustable-ring-mode (ARM) laser beam to optimise the microstructure and mechanical performance of laser welded 6xxx high-strength aluminium alloy joints. A remote laser welding system equipped with transverse beam oscillation was employed and welding parameters, including the beam oscillation width and core/ring power ratio of the ARM laser beam, were investigated sequentially. Results showed that the core/ring power ratio at a constant total power has a limited control on the weld geometry when integrated with beam oscillation. Increasing the beam oscillation width, up to 2.5 mm, resulted in a wider weld interface and a threshold value of 3.1 mm was determined to activate the transition from interface failure to the fusion boundary failure subjected to tensile lap shear loading, leading to a significant improvement in the joint strength from 170 N/mm to 277 N/mm. Furthermore, results revealed that proper selection of core/ring power ratio at a constant total power can restrict the formation of columnar grains near the interface between two plates, resulting in grain refinement within the weld zone. Both extremely high power ratio, for example core alone mode (infinite power ratio) and extremely low power ratio, e.g. ring alone mode (zero power ratio), lead to a low thermal gradient and cooling rate at the solidification front. A compromised solution which balances the wider formation of equiaxed dendrites and better grain refinement was determined at the power ratio of 0.33, translating to the improvement in joint strength up to 400 N/mm.

Correlation between Differential Fast Scanning Calorimetry and Additive Manufacturing Results of Aluminium Alloys.

High-strength aluminium alloy powders modified with different nanoparticles by ball milling (7075/TiC, 2024/CaB6, 6061/YSZ) have been investigated in-situ during rapid solidification by differential fast scanning calorimetry (DFSC). Solidification undercooling has been evaluated and was found to decrease with an increasing number of nanoparticles, as the particles act as nuclei for solidification. Lower solidification undercooling of individual powder particles correlates with less hot cracking and smaller grains in the material produced by powder bed fusion of metals by a laser beam (PBF-LB/M). Quantitatively, solidification undercooling less than about 10–15 K correlates with almost crack-free PBF-LB/M components and grain sizes less than about 3 µm. This correlation shall be used for future purposeful powder material design on small quantities before performing extensive PBF-LB/M studies.

(Digital Presentation) The Effect of Tartaric-Sulfuric Acid (TSA) Anodizing on the Corrosion Resistance of the AA7475-T761

The microstructure of the high strength aluminum alloy, AA7475–T761, in the as-received condition was characterized by optical microscopy, scanning electron microscopy and transmission electron microscopy, and statistical analyses of grain size and micrometer precipitates distribution and density were performed. An anodic aluminum oxide (AAO) film was potentiostatically grown on the alloy in tartaric sulfuric acid (TSA). The anodizing behavior of the alloy and the mechanisms of localized corrosion initiation and propagation in bare (not anodized) and anodized conditions were discussed. The alloy corrosion behavior was investigated in sodium chloride solutions using electrochemical techniques (cyclic potentiodynamic polarization) and the morphology and extent of corrosion propagation was investigated through optical microscopy, optical profilometry and scanning electron microscopy analyses. It was observed that the two alloy surface conditions (bare and anodized) play different roles in the propagation of the localized corrosion process. The bare alloy presented lower localized corrosion potentials and the propagation of the localized corrosion was shallower, but more heavily distributed, than in the anodized condition. However, the alloy in the anodized condition presented lower repassivation potentials due to the deeper pits formed. In addition, the variability of pitting potentials for the anodized condition was high, due to the heterogenous structure of the AAO film formed, and dependent on the time and drying storage conditions previous to electrochemical characterizations. The electrochemical results were correlated with the microstructural characteristics of the oxide surface film of the alloy in both conditions, bare (not anodized) and anodized.

Characterization of hydrogen assisted corrosion cracking of a high strength aluminum alloy

Abstract Environmentally and hydrogen assisted cracking can occur during application of high-strength aluminum alloys. However, there are only few suitable laboratory procedures to characterize and evaluate the environmentally and hydrogen assisted cracking behavior of materials. By optimizing the hydrogen charging parameters and slow strain rate, a multidimensional test procedure was established, which could simulate the actual working environment and could realize the test and evaluation of hydrogen assisted cracking susceptibility in the laboratory. Moreover, it provides a new environmental adaptability evaluation method for the high-strength aluminum alloy materials.

Modeling anisotropic ductile fracture of AA7075-T6 sheet for sheet metal forming considering anisotropic stress state

Anisotropic ductile fracture is one of the critical issues in the precision plastic forming of lightweight sheet metals. In this work, a new anisotropic ductile fracture model is developed by introducing the anisotropic stress triaxiality into the weight equation of the shear-controlled ductile fracture criterion. In an attempt to consider the effect of material anisotropy on stress state, the proposed fracture model is constructed in the anisotropic stress state form. The proposed anisotropic fracture model is used to characterize the anisotropic ductile fracture behavior of the AA7075-T6 sheet with a thickness of 2.0 mm under various stress states at room temperature. A series of uniaxial tensile tests are conducted using the in-plane shear specimen, the specimen with a central hole, and the plane strain grooved specimen to experimentally investigate the ductile fracture of AA7075-T6 along rolling, diagonal, and transverse directions. The proposed fracture model is calibrated by fracture strains determined from the hybrid experimental–numerical approach. With the calibrated fracture model, the anisotropic ductile fracture behaviors of AA7075-T6 over a wide range of stress states are predicted and compared with experimental measurements. The results show that the proposed fracture model successfully captures the anisotropic ductile fracture behavior of AA7075-T6 under various stress states at room temperature. Furthermore, to further illustrate the fracture predictive capability of the proposed fracture model, the predicted anisotropic fracture forming limit diagram is compared with the experimental forming limit strains obtained from the literature. Reasonable agreement is shown between literature data points and predicted fracture forming limit diagram. Accordingly, the proposed model has a great advantage in quantitative characterizing the anisotropic ductile fracture of high-strength aluminum alloy sheets under various loading conditions.

Inhibiting weld cracking in high-strength aluminium alloys

Cracking from a fine equiaxed zone (FQZ), often just tens of microns across, plagues the welding of 7000 series aluminum alloys. Using a multiscale correlative methodology, from the millimeter scale to the nanoscale, we shed light on the strengthening mechanisms and the resulting intergranular failure at the FQZ. We show that intergranular AlCuMg phases give rise to cracking by micro-void nucleation and subsequent link-up due to the plastic incompatibility between the hard phases and soft (low precipitate density) grain interiors in the FQZ. To mitigate this, we propose a hybrid welding strategy exploiting laser beam oscillation and a pulsed magnetic field. This achieves a wavy and interrupted FQZ along with a higher precipitate density, thereby considerably increasing tensile strength over conventionally hybrid welded butt joints, and even friction stir welds.

Towards understanding metallurgical defect formation of selective laser melted wrought aluminum alloys

The formation of balling, porosity and cracking defects is a vital obstacle in selective laser melting of wrought Al alloys. However, it lacks systematic research on the origins of these imperfections. Herein, the formation mechanisms and avoidance methods of metallurgical defects in slective laser melting (SLM)-processed Al–Cu–Mg alloy were investigated by numerical simulation and microstructure characterization. Process optimization by altering laser energy density can effectively suppress balling and porosity, thus enhancing relative density. Cracking results from the stress concentration and columnar grains arise due to the rapid cooling process during SLM. The methods that promote the columnar-to-equiaxed grain transition, such as microalloying by Sc/Zr/Ti elements, co-incorporation of ceramic particles and introducing ultrasound, can effectively enhance the cracking resistance and mechanical properties of wrought Al alloys. The formation of balling, porosity and cracking defects is a vital obstacle in selective laser melting of high strength aluminum alloys. Numerical simulation was used to reveal the metallurgical behavior evolution of the molten pool. The defect formation mechanisms and avoidance methods in selective laser melting process of Al-Cu-Mg alloy are discussed both experimentally and computationally.

Enhanced strength and ductility in Al-Zn-Mg-Cu alloys fabricated by laser powder bed fusion using a synergistic grain-refining strategy

• A synergistic grain-refining strategy is introduced to control the structure of Al-Zn-Mg-Cu alloy. • The LPBF processability of the Al-Zn-Mg-Cu alloy is increased by grain refinement. • The UTS and EL of Al-Zn-Mg-Cu-Ti-TiC alloy are way above those of Al-Zn-Mg-Cu alloy. • The underlying grain refinement mechanism of different grain refiners is discussed. Grain refinement is critical to surpassing the bottlenecks of inherent hot tearing of high-strength aluminum alloys fabricated by additive manufacturing (AM). In this study, a synergistic grain-refining strategy including heterogeneous nucleation, solute-driven growth restriction and nanoparticle-induced growth restriction was introduced to control the microstructure of Al-Zn-Mg-Cu alloys during the laser powder bed fusion (LPBF) process. Crack-free Al-Zn-Mg-Cu alloys with significantly refined grains were safely fabricated via LPBF by coincorporation of TiC and TiH 2 particles. In-situ L1 2 -Al 3 Ti particles were produced to promote the heterogeneous nucleation. The grain growth was restricted by adding Ti solute, while introduced TiC nanoparticles (NPs) improved the density of heterogeneous nucleation sites and blocked grain growth physically. The resultant elimination of columnar grains and hot cracks in the (1 wt.%) TiC- and (0.8 wt.%) TiH 2 -modified Al-Zn-Mg-Cu alloy resulted in excellent ultimate tensile strength (UTS) of 593 ± 24 MPa, yield strength (YS) of 485 ± 41 MPa and elongation (EL) of 10.0% ± 2.5% under the T6 condition. This study provides new insights into improving the grain microstructure and mechanical properties of high-strength aluminum alloys during LPBF.

Strengthening of dislocation and precipitation for high strength and toughness casting Al–Zn–Mg–Cu alloy via trace TiB2+TiC particles

Adding alloying elements to increase precipitation is a common method to strengthen aluminum (Al) alloys, but an excessively high alloying element content causes segregation and a reduction in plasticity. In this work, the tradeoff between alloying element content and segregation was explored along with the simultaneous increase in precipitation and dislocation density under the action of trace TiB2+TiC particles with the aim of giving a full play to the strengthening effect of dislocation and precipitation and maximizing the strength and toughness of the alloy. The cast Al–Zn–Mg–Cu alloys contained various alloying elements (Zn, Mg), and the alloys were reinforced with 0.5 wt% TiB2+TiC particles via in-situ reaction in the Al melt. The TiB2+TiC particles blocked the diffusion of the alloying elements and inhibited segregation, promoting solution of alloying elements and yielding dispersed and finer precipitates after solution and aging. Meanwhile, owing to the difference in the thermal expansion coefficients of the matrix and particles, the dislocation density of the alloy doubled. Therefore, the yield strength, elongation, and the product of the tensile strength and elongation of the Al-6.60Zn-3.15Mg-1.60Cu alloy with particles reinforcement were 562 MPa, 4.5%, and 3163 MPa·%, respectively, representing increases of 31.6%, 108.9%, and 186.0%, respectively, compared with the cast 7075 alloy. This study is significant for the successful preparation of high-strength and high-toughness cast aluminum alloys with high alloying-element content.

Управління структурою і властивостями ливарного алюмінієвого сплаву АМ4.5Кд (ВАЛ10) модифікуванням дрібнокристалічними лігатурами

To management the structure, mechanical and operational properties of the high-strength cast aluminum alloy АМ4.5Кд (ВАЛ10), the work uses a modification method based on the principle of structural inheritance, using rapidly cooled (Vcool. ≥ 10^5 °С/s) fine-crystal ligatures AlTi5 and AlZr10, and as well as ligatures of the chemical composition of the base alloy with nanoscale size of intermetallics and Alα crystals. Studies have shown that the introduction of fine-crystalline additives into the melt leads to a transition from a dendritic to a non-dendritic structure, a significant decrease in the size of the crystals of the Alα solid solution, and an increase in its degree of supersaturation. The microstructure becomes more uniform - the difference between the maximum and minimum size of the grains decreases. The most effective reduction of the grain size and the transition from dendritic to non-dendritic structure of the aluminum solid solution at increased cooling rates occurs when alloying with fine-crystal AlTi5 ligature introduced into the melt in terms of pure titanium 0.05-0.15 wt. %. We must think that the main factor of modification by rapidly cooled ligatures is the introduction of a large number of additional crystallization centers into the melt. After T6 heat treatment, the highest strength of AM4.5Kd alloy (VAL10) is achieved when modified with AlZr10 ligature, in particular, with a mass fraction of zirconium of 0.25%. Probably, this is mainly due to the expansion of the region of the solid solution of copper and zirconium in aluminum during high-speed cooling and its subsequent disintegration during heat treatment with the release of strengthening nano-sized CuAl2 and Al3Zr phases. Tribological studies of AM4.5Kd alloy (VAL10) were carried out. The alloy modified with fine crystal ligature of the base alloy composition in the amount of 12 wt.% has the highest wear resistance. Keywords: fine crystal ligatures, AM4.5Kd (VAL10), modification, microstructure, strength, wear resistance.

Crystallization Conditions for Ingots of High-Strength Aluminum Alloys with an Increased Content of Zirconium

Crystallization Conditions for Ingots of High-Strength Aluminum Alloys with an Increased Content of Zirconium

Effect of Thermo-Mechanically Activated Precipitation on the Hot Deformation Behavior of High Strength Aluminum Alloy AA7075

The present study investigates the effect of two different microstructural conditions on the hot deformation behavior of precipitation-hardenable AA7075 by compression tests ranging from 200 °C to 350 °C and strain rates from 0.1 s−1 to 10 s−1. The first condition is solution heat-treated and quenched in water, whereas the second condition is achieved by subsequent artificial aging and stabilization for 24 h at the respective intended deformation temperature. Both conditions indicate an increase in flow stress with increasing strain rate and decreasing deformation temperature. Moreover, with increasing deformation temperature and decreasing strain rate, the flow behavior gradually changes as dynamic recrystallization becomes the dominant factor for the flow curve appearance. At the same deformation temperature, higher flow stresses are obtained for the as-quenched condition due to the dynamic precipitation and growth of very small precipitates (r < 20 nm) during hot deformation. For the deformation temperature of 200 °C and the strain rate of 10 s−1, higher peak stresses of 110 MPa are obtained for the as-quenched condition. This is confirmed by the transmission electron microscopy investigations, which show the formation of very fine precipitates for the as-quenched condition, while coarse precipitates can be found in the stabilized microstructure. Despite this observation, the work hardening analysis reveals lower strain-hardening rates for the as-quenched condition and higher critical stresses for the onset of dynamic recrystallization compared to the thermally stabilized microstructure.

Ballistic limit predictions of non-identical layered targets perforated in ductile hole formation

The ballistic resistance of metallic targets perforated in ductile hole formation can be accurately calculated for monolithic targets, multi-layered targets with air-gaps between plates, and multi-layered targets of identical, in-contact layers via utilisation of the specific cavitation energy concept. Here we present an extension to those models for application to targets with two in-contact layers of varying material type and thickness. We hypothesise that the perforation of the second (bottom,rear,back) layer is not affected by the resistance of the first (upper,top,front) layer, which has already been perforated. Rather, the second layer acts as an independent monolithic target. Using the ballistic equivalence concept, which has been validated by a comprehensive numerical study with abrasion resistant steel targets (Hardox 400), high-strength aluminium alloy targets (AA6061-T651) and annealed aluminium alloy targets (AA6070-O) perforated by rigid projectiles, we develop a heuristic model in which the second layer is replaced by a ballistically-equivalent layer of material identical to that of the first layer. Utilising finite element simulations, we demonstrate the accuracy of the suggested model for double-layered targets consisting of a Hardox 400 steel layer and a AA6070-O aluminium layer, perforated by a hardened tool steel projectile and find it to be high enough for practical use over a wide range of target configurations.

Controlling Welding Residual Stress and Distortion of High-Strength Aluminum Alloy Thin Plates by a Trailing Hybrid High-Speed Gas Fluid Field

This paper presents an investigation of the welding residual stress and distortion of LY12 high-strength aluminum alloy (6061) by improving the local welding thermal and mechanical fields. A trailing hybrid high-speed gas fluid method was proposed and applied to decrease the welding residual stress and distortion of 6061 aluminum alloy efficiently. Firstly, the temperature and stress fields were calculated using the finite element simulation method, considering a trailing hybrid high-speed gas fluid field. The distance between the aerodynamic load and the heat source action was a key factor determined by the simulation method. In addition, the reasonable effective range of gas pressure was obtained. Subsequently, welding and distortion tests were conducted on the self-developed device under conventional welding and high-speed gas fluid field conditions. The results showed that an aerodynamic load under 30 MPa of gas pressure was available near the area at a distance of 20–28 mm from the heat source for thin plate welding distortion. The peak longitudinal residual tensile stresses in the weld’s mid-length section decreased by 77.73%, the peak residual compressive stresses decreased by 69.23% compared with conventional welding, and the deflection distortion disappeared almost entirely. The maximum deflection of the distortion was only 1.79 mm, which was 83.76% lower than the 11.02 mm of the conventional welding distortion. This validates that the method can simultaneously and greatly eliminate the welding residual stress and distortion.