The competition behavior of strengthening and toughening and microstructure evolution of as-annealed Ti-4Al-1.5Mn alloy during multi-directional isothermal forging

The effect of Sc on the microstructure of Mg-4Al-0.5Mn alloy and the resultant differentiated corrosion behavior in NaCl and Hanks' solution

ABSTRACT This study investigates the influence of silicon nitride (Si3N4) and titanium diboride (TiB2) reinforcements on the density, microstructure, hardness and corrosion behaviour of Ti–10Mn composite. The results showed a reduction in relative density from 99.45% to 95.32% with the addition of manganese and ceramic particles, accompanied by a transformation of the microstructure from lamellar to equiaxed and elongated grains. The ceramic particles, located at grain boundaries, restricted grain growth, resulting in a significant increase in hardness from 245.8 to 496.8 HV0.5. Corrosion resistance was notably enhanced in the Ti–10 wt% Mn alloy (sample S5) containing Si3N4 and TiB2, as evidenced by a lower corrosion rate (0.321 mm/year) and current density (8.498 µA/cm2) in 0.9 wt% NaCl solution. However, in Hank’s solution, the corrosion rate (0.413 mm/year) and current density (11.717 µA/cm2) increased, respectively. The combined effect of TiB2 and Si3N4 facilitated the formation of a dense, stable oxide layer, improved microstructural stability and refined the microstructure. Additionally, the reinforcements suppressed grain boundary corrosion by stabilising boundaries and improving passivity, thereby reducing anodic reaction rates. These findings highlight the potential of ceramic reinforcements to enhance the mechanical and electrochemical properties of Ti-10Mn composites.

Machine-learning prediction for solid–liquid interfacial properties from micrographs in Al–Cu and Fe–Mn alloys

Interface electron transfer driven H2O2 activation over a MOF-derived Fe3O4-FeM/C cathode for efficient electro-Fenton degradation of tetracycline.

Correlation of Microstructures with Creep and Corrosion Performance of Mg-5.0Al-2.0Ca-0.3Mn and MRI230D Alloys

The influence of Mn content on the mechanical property and degradation behavior of Zn Mn alloy foams

This study investigated the influence of Mn content (70 wt.%, 75 wt.%, and 80 wt.%) on the microstructure, mechanical properties and damping capacity of Mn-Cu alloys using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), mechanical testing and dynamic mechanical analysis (DMA). The results indicate that during cooling after aging, the Mn-Cu alloy undergoes martensitic transformation, resulting in a dual-phase structure of fcc and fct. The 70 wt.% Mn alloy exhibits a mixed-grain structure with mostly long, straight twin bands, while the 75 wt.% and 80 wt.% Mn alloys consist of fine equiaxed grains with mostly intersecting twin bands. The microstructure determines the properties of the alloy. As the Mn content increases, the mechanical properties initially increase and then decrease, and the 75 wt.% Mn alloy has the best mechanical performance (UTS = 534 MPa, YS = 263 MPa). In contrast, the damping capacity shows a decreasing trend, and the 70 wt.% Mn alloy exhibits the best damping capacity (tanδ = 0.064). The main damping peak of tanδ in Mn-Cu alloys is derived from the relaxation of the twin boundaries, and the less obvious secondary peak is the internal friction peak of martensitic transformation.

Porous Mg–Mn Alloys Fabricated by Powder Metallurgy: Microstructural Evolution and Structure–Property Relationships

The evolution of crystallographic texture and microstructure in a Zr–0.6Nb–0.4Mn alloy was investigated using an optimized thermomechanical processing route comprising β-solution treatment, limited hot rolling, high cold rolling, and short-time, low-temperature annealing. This route was designed to develop a strong basal texture with poles preferentially aligned with the sheet normal direction in an experimental alloy, a condition known to mitigate deleterious hydride reorientation and improve the in-service performance of zirconium fuel claddings. High cold rolling reduction (81.6%) played a key role in building a pronounced basal texture with the {0001} < 10 1 ¯ 0 > and {0001} < 11 2 ¯ 0 > components, with a basal pole tilt from the normal direction toward the transverse direction of approximately 30° compared with textures reported for conventional Zr Nb alloys. Subsequent annealing at 500 °C for 2 h and 4 h promoted partial recrystallization while preserving a high alignment of basal poles with the normal direction (f ND ≈ 0.46). Transmission electron microscopy revealed a partially recrystallized microstructure consisting of fine grains ranging from 300 nm to 2 μm and Mn₂Nb nanoprecipitates (10–50 nm), showing a more homogeneous distribution after 4 h. By combining texture analysis, Kearns factors, and detailed TEM observations, this study demonstrates that tailored combinations of hot and cold deformation with short-time, low-temperature annealing can simultaneously refine texture and precipitation in Zr–Nb–Mn alloys. The resulting basal texture characteristics and controlled precipitation state provide a microstructural basis for improving the performance of zirconium components in nuclear environments. • Cold rolling to 81.6% reduction promotes a strong basal texture with reduced TD tilt. • Annealing at 500 °C yields a partially recrystallized microstructure with 300 nm–2 μm grains. • TEM analysis reveals uniformly distributed Mn₂Nb nanoprecipitates sized 10–50 nm.

Problem. Currently used materials for ureteral stents are unable to eliminate inflammation, exhibit low strength, and require a second surgery for removal. Metallic bioresorbable stents can reduce the burden on the patient’s body and eliminate additional operations for product removal. Aim. To roduce a new biocompatible Zn-1 %Cu-1 %Mn alloy and, using equal-channel angular pressing at elevated temperature, to develop an improved set of mechanical properties for potential application as a material for ureteral stents. Methods. The Zn-1 %Cu1 %Mn alloy was subjected to equal-channel angular pressing at 200 °C (8 passes, route Bc). The microstructure and elemental composition were studied using transmission electron microscopy with energy-dispersive analysis. Mechanical properties were evaluated under uniaxial tension (strain rate of 10–3 с –1 , at least 3 samples per each condition), Vickers microindentation with construction of hardness distribution maps, and fractographic analysis of fracture surfaces using a scanning electron microscope. Results. By indexing diffraction patterns, it was established that the deformation processing promotes the precipitation of MnZn13 phase particles, which may have a strengthening effect. Fractographic analysis of fractured samples after tension showed a change in the fracture character from brittle to ductile with deep dimples. Carrying out equal-channel angular pressing (ECAP) for 8 passes at elevated temFrontier Materials &amp; Technologies. 2026. № 1 17 Абдрахманова Э.Д., Хафизова Э.Д., Поленок М.В. и др. «Влияние высокотемпературного РКУП на структуру и механические…» peratures allowed increasing the ultimate tensile strength by 2.3 times, the offset yield strength by 3 times, and the percentage elongation by 8 times. The distribution of microhardness values becomes more uniform with a n increase in passes from 2 to 8, and the gap between the smallest and largest values decreases. Conclusions. It was established that the deformation method (ECAP, 8 passes) for the new biocompatible Zn-1 %Cu-1 %Mn alloy develops an improved set of mechanical properties, which opens up possibilities for its application in medical purposes.

Regulatory mechanisms of rare earth Er and annealing on corrosion resistance and formability of Al–Mg–Mn alloys

Mechanism of Ultrasonic Power and Pressure Synergistic Regulation of Microstructure and Mechanical Properties of Al–5.0Cu–0.6Mn Alloy

The mechanical properties and electrical conductivity of the Al–0.15Fe–0.5Si–0.5Mg–0.2Mn alloy with a Mg/Si ratio of 1 were investigated using optical microscopy, scanning and transmission electron microscopy, tensile testing, Vickers hardness measurements, and specific electrical resistivity measurements. To analyze the electrical conductivity data, the unit % IACS was used, calculated as a percentage relative to the conductivity of annealed copper. The alloy was studied in the as-cast condition, in the deformed condition (following extrusion and drawing), and after heat treatments: HT1 — solution treatment at 530°C and aging at 140°C for 8 hours, and HT2 - solution treatment at 560°C and aging at 175°C for 6 hours. The microstructure of the investigated alloy varied depending on the condition and heat treatment parameters, consisting of an aluminum matrix and strengthening particles with different morphologies and chemical compositions. For rods in the as-cast state, the conductivity was 55% IACS, ultimate tensile strength (UTS) — 150 MPa, and elongation — 14%. After HT1: 51% IACS, UTS — 140 MPa, elongation — 19%. After HT2: 51% IACS, UTS — 195 MPa, elongation — 19%.

Mechanical properties contribution via transformation of precipitates regulation, twinning, and non-basal slip systems activated by trace Y addition in a Mg–4Al-1.5La-2.5Ce-0.3Mn alloy

Synergistic effect of Gd/Y microalloying on dynamic recrystallization and hot deformation behavior of high-Mg content Al-9.7Mg-0.4Mn alloy

In-situ SEM observation and CALPHAD guiding optimization of morphology of Fe-bearing phases in solution heat treated die-cast Al-Si alloys

Role of annealing duration on grain distribution and fracture mechanisms in Zn–Mn alloy

Study on the rare earth phases, crystal textures and mechanical properties of pulsed laser welded Mg-5Al-2Gd-0.5Mn alloy weld

Roles of Mn on corrosion resistance in Mg–Zn–Sn–Zr-xMn alloys