Scholarlink

<p>Constrained groove pressing (CGP) is a severe plastic deformation technique used to produce ultrafine-grained microstructures in metal sheets. However, conventional CGP often leads to non-uniform microstructures and pronounced anisotropic mechanical properties due to sharp die edges. To address this, the primary objective of the present study is to reduce mechanical anisotropy through the development of a novel asymmetric constrained constant radius pressing (A-CCRP) die. This die features a corrugated, asymmetric profile that promotes uniform strain distribution and more homogeneous microstructures. As an additional goal, the study aims to ensure that ductility is not significantly compromised during processing. A complementary “Flip Method” was also introduced to enhance strain uniformity and reduce stress concentration. The A-CCRP die demonstrated improved strength with minimal loss in ductility, enhanced toughness, and reduced anisotropy compared to annealed or conventionally processed samples. Controlled recrystallization of A-CCRP-processed specimens helped alleviate localized strain concentrations, thereby improving ductility and toughness without compromising strength. To holistically assess the mechanical performance, the concept of Failure Toughness was introduced, integrating both strength and toughness as a unified metric. Overall, the combination of the A-CCRP die design, the Flip Method, and controlled recrystallization led to superior, more isotropic mechanical properties than those achieved by conventional CGP.</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

Novel Asymmetric CCRP Die Geometry for Optimized Microstructure and Outstanding Failure Tolerance

  • 期刊论文

  • 发表日期：

    2025年12月12日

查看全文
  • Nikhil Tripathi,
  • Prince Setia,
  • Swapnil Sawalkar,
  • K. Mondal,
  • Shashank Shekhar

摘要

Constrained groove pressing (CGP) is a severe plastic deformation technique used to produce ultrafine-grained microstructures in metal sheets. However, conventional CGP often leads to non-uniform microstructures and pronounced anisotropic mechanical properties due to sharp die edges. To address this, the primary objective of the present study is to reduce mechanical anisotropy through the development of a novel asymmetric constrained constant radius pressing (A-CCRP) die. This die features a corrugated, asymmetric profile that promotes uniform strain distribution and more homogeneous microstructures. As an additional goal, the study aims to ensure that ductility is not significantly compromised during processing. A complementary “Flip Method” was also introduced to enhance strain uniformity and reduce stress concentration. The A-CCRP die demonstrated improved strength with minimal loss in ductility, enhanced toughness, and reduced anisotropy compared to annealed or conventionally processed samples. Controlled recrystallization of A-CCRP-processed specimens helped alleviate localized strain concentrations, thereby improving ductility and toughness without compromising strength. To holistically assess the mechanical performance, the concept of Failure Toughness was introduced, integrating both strength and toughness as a unified metric. Overall, the combination of the A-CCRP die design, the Flip Method, and controlled recrystallization led to superior, more isotropic mechanical properties than those achieved by conventional CGP.