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Mechanical Performance and Microstructural Characterization of Light Alloys (3rd Edition)

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: 30 November 2025 | Viewed by 1054

Special Issue Editor

Special Issue Information

Dear Colleagues,

After our first two successful editions of the Special Issue “Mechanical Performance and Microstructural Characterization of Light Alloys”, we decided to launch the third edition of this Special Issue on light alloys. Light alloys, such as aluminum, magnesium, and titanium, are important materials for the automobile, aircraft, and electronic industries. In recent decades, many studies have reported on the microstructure characteristics, mechanical performance, and advantages of light alloys. Many outstanding studies have resulted in fast progress being made. However, to the best of our knowledge, there are, of course, still many unknown theories and unsolved problems in light alloys. Thus, to further trigger the development of light alloys, the relationship between microstructure characteristics and mechanical performance needs to be researched more deeply. For this reason, the present Special Issue, entitled “Mechanical Performance and Microstructural Characterization of Light Alloys”, is proposed. This Special Issue aims to collect excellent studies on light alloys from around the world, including, but not limited to, aluminum alloys; magnesium alloys; titanium alloy; mechanical performance; microstructure characterization; heat treatment; plastic processing; precipitation; phase transformation; SEM; EBSD; FIB; TEM; and in situ X-rays.

We welcome you to submit your excellent work to this Special Issue, entitled “Mechanical Performance and Microstructural Characterization of Light Alloys (3rd Edition)”, of Materials.

Dr. Qinghuan Huo
Guest Editor

Manuscript Submission Information

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Keywords

  • aluminum alloys
  • magnesium alloys
  • titanium alloys
  • mechanical performance
  • microstructure characterization
  • heat treatment
  • plastic processing
  • precipitation
  • phase transformation

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Published Papers (2 papers)

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Research

17 pages, 14796 KB  
Article
High-Temperature Deformation Behaviors of Gradient-Structured Mg-Gd-Y-Zr Alloys at High Strain Rates
by Jialiao Zhou, Minghui Wu, Wenxuan Zhang and Jiangli Ning
Materials 2025, 18(17), 4085; https://doi.org/10.3390/ma18174085 - 31 Aug 2025
Viewed by 444
Abstract
The deformation behaviors of a gradient-structured (GS) Mg-Gd-Y-Zr alloy, prepared via surface mechanical attrition treatment (SMAT), were systematically investigated in comparison with those of a uniform coarse-grained (CG) counterpart by high-temperature tensile tests at high strain rates (≤400 °C and ≥0.01 s−1 [...] Read more.
The deformation behaviors of a gradient-structured (GS) Mg-Gd-Y-Zr alloy, prepared via surface mechanical attrition treatment (SMAT), were systematically investigated in comparison with those of a uniform coarse-grained (CG) counterpart by high-temperature tensile tests at high strain rates (≤400 °C and ≥0.01 s−1). The results indicated that the uniform CG samples exhibited high flow stresses and low elongations (43.9% at 400 °C and 0.01 s−1). Their fraction of dynamic recrystallization (DRX) during the hot deformation was very low, and the dislocations accumulated inside the deformed grains formed high residual stresses. Moreover, the solely operated prismatic <a> slips in the coarse grains implied insufficient deformation coordination. These resulted in their low deformability. By contrast, the GS samples formed by SMAT exhibited more stable flow behaviors, showing lower flow stresses and higher elongations (71.9% at 400 °C and 0.01 s−1). The high dislocation density in the severely deformed (SD) layer provided sufficient driving force for DRX, promoting remarkable softening effect during the hot deformation. The grain boundary slip mechanism facilitated by DRX in the SD layer played a significant role in the hot deformation, enhancing the overall plasticity of the GS samples, although the deformed coarse-grained (DCG) layer deformed in a manner resembling that of the CG samples. Full article
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14 pages, 4541 KB  
Article
Deformation Behaviors and Toughening Mechanisms of Gradient-Structured Mg-Gd-Y Alloy
by Bosong Gao, Minghui Wu, Jiangli Ning, Siwei Wang and Yang Wang
Materials 2025, 18(16), 3818; https://doi.org/10.3390/ma18163818 - 14 Aug 2025
Viewed by 436
Abstract
A Mg-Gd-Y alloy prepared by surface mechanical attrition treatment (SMAT) was annealed at 450 °C combined with peak aging. The deformation and fracture mechanisms were investigated using in situ tensile tests. Through quantitative calculations of the geometrically necessary dislocation (GND) densities, it was [...] Read more.
A Mg-Gd-Y alloy prepared by surface mechanical attrition treatment (SMAT) was annealed at 450 °C combined with peak aging. The deformation and fracture mechanisms were investigated using in situ tensile tests. Through quantitative calculations of the geometrically necessary dislocation (GND) densities, it was found that the fine-grained (FG) layer in the gradient structure carried greater plastic strain than the coarse-grained (CG) layer during tension. The calculation results of the geometric compatibility parameter (m’) and microstructure characterization during in situ tests showed that crack initiation and propagation were prone to occur between adjacent coarse grains. However, the hetero-deformation-induced (HDI) strengthening and strain hardening induced by the strain gradient between the FG and CG layers effectively improved the strength–ductility synergy of the gradient-structured (GS) alloy. In addition, the synergistic effect of intrinsic and extrinsic toughening mechanisms in the GS alloy played a significant role in delaying premature failure. Full article
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