Scholarlink

<p>A non-equimolar Ti-V-Nb-Mo-Ni multi-principal-element alloy (MPEA) with a valence electron concentration (VEC) of 5.90 was successfully fabricated via vacuum arc melting (VAM) followed by solution treatment at 1200&#xa0;°C for 24&#xa0;h. Microstructural characterization and room-temperature mechanical tests were conducted to explore the microstructure–property relationship. The as-cast alloy has a compressive yield strength of 1525&#xa0;MPa and a fracture strain of 9%, while the solution-treated alloy exhibits a yield strength of 1400&#xa0;MPa and a fracture strain of over 20%. Microstructural analysis shows that solution treatment alleviates segregation and improves homogeneity but retains multi-scale second phases, whose synergistic strengthening effect (combined with solid solution strengthening and the lattice distortion effect) contributes to the excellent strength–plasticity combination of the alloy. This non-equimolar design breaks the limitation of traditional equimolar MPEAs, providing an experimental basis for the directional design of high-performance MPEAs.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Phase Composition Regulation and Mechanical Properties of Non-equimolar Ti-V-Nb-Mo-Ni Multi-Principal-Element Alloy via Valence Electron Concentration Optimization

  • 期刊论文

  • 发表日期：

    2026年6月19日

查看全文
  • Zhang Lei,
  • Zhong Bing,
  • Meng Shujuan,
  • Wang Zhong

摘要

A non-equimolar Ti-V-Nb-Mo-Ni multi-principal-element alloy (MPEA) with a valence electron concentration (VEC) of 5.90 was successfully fabricated via vacuum arc melting (VAM) followed by solution treatment at 1200 °C for 24 h. Microstructural characterization and room-temperature mechanical tests were conducted to explore the microstructure–property relationship. The as-cast alloy has a compressive yield strength of 1525 MPa and a fracture strain of 9%, while the solution-treated alloy exhibits a yield strength of 1400 MPa and a fracture strain of over 20%. Microstructural analysis shows that solution treatment alleviates segregation and improves homogeneity but retains multi-scale second phases, whose synergistic strengthening effect (combined with solid solution strengthening and the lattice distortion effect) contributes to the excellent strength–plasticity combination of the alloy. This non-equimolar design breaks the limitation of traditional equimolar MPEAs, providing an experimental basis for the directional design of high-performance MPEAs.