Scholarlink

<p>In this study, a gradient structure (GS) with a thickness of about 200&#xa0;μm was fabricated on the surface of a Fe−3Cu alloy through surface mechanical rolling treatment (SMRT) combined with annealing. The dislocation density decreased and the grain size increased with increasing depth in both the GS and annealed-GS (A-GS) samples, reflecting the transition from the refined gradient surface layer to the original coarse-grained interior. The GS sample exhibited a notable increase in microhardness and strength, attributed to grain refinement, dislocation strengthening, and heterogeneous deformation-induced (HDI) hardening, accompanied by a slight reduction in ductility. In contrast, the A-GS sample demonstrated significant simultaneous improvements in both strength and ductility compared to the GS sample, likely due to grain boundary relaxation, dislocation rearrangement, and retention of the gradient structure. Both the GS and A-GS samples showed substantial enhancements in wear and corrosion resistance relative to the initial material. These findings present a promising approach for achieving an exceptional balance of strength and ductility, along with improved wear and corrosion resistance in Fe-based alloys, thereby broadening their potential engineering applications.</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

Achieving Superior Mechanical and Electrochemical Properties in a Fe−3Cu Alloy with a Gradient Structure

  • 期刊论文

  • 发表日期：

    2025年6月23日

查看全文
  • Yu Liu,
  • Jiangjie Liao,
  • Pengcheng Ma,
  • Mian Chen,
  • Jing Qiu,
  • Jian Hu

摘要

In this study, a gradient structure (GS) with a thickness of about 200 μm was fabricated on the surface of a Fe−3Cu alloy through surface mechanical rolling treatment (SMRT) combined with annealing. The dislocation density decreased and the grain size increased with increasing depth in both the GS and annealed-GS (A-GS) samples, reflecting the transition from the refined gradient surface layer to the original coarse-grained interior. The GS sample exhibited a notable increase in microhardness and strength, attributed to grain refinement, dislocation strengthening, and heterogeneous deformation-induced (HDI) hardening, accompanied by a slight reduction in ductility. In contrast, the A-GS sample demonstrated significant simultaneous improvements in both strength and ductility compared to the GS sample, likely due to grain boundary relaxation, dislocation rearrangement, and retention of the gradient structure. Both the GS and A-GS samples showed substantial enhancements in wear and corrosion resistance relative to the initial material. These findings present a promising approach for achieving an exceptional balance of strength and ductility, along with improved wear and corrosion resistance in Fe-based alloys, thereby broadening their potential engineering applications.