Scholarlink

<p>This study investigates a novel severe plastic deformation (SPD) technique—constrained studded pressing (CSP)—for refining grain structure in AA1100 aluminum sheets without altering their dimensions. Custom orthogonal-groove dies were developed, and samples underwent one to four CSP passes. Mechanical properties were evaluated via tensile and hardness tests, while microstructural evolution was examined using electron microscopy. Up to the third pass, yield strength rose from 118 to 225&#xa0;MPa, ultimate tensile strength from 190 to 289&#xa0;MPa, and hardness increased significantly, while elongation dropped from 15 to 3.6%. A slight decline in strength during the fourth pass was attributed to microcracks and grain boundary saturation. Finite element simulations accurately captured plastic strain distribution, revealing lower strain near sheet edges. Compared to conventional SPD methods like constrained groove pressing (CGP) and repetitive corrugation and straightening (RCS), CSP showed superior strain efficiency and more uniform grain refinement. These findings suggest that with proper die design and process control, CSP can significantly enhance the mechanical performance of aluminum sheets.</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

Enhanced Mechanical and Microstructural Performance of AA1100 Aluminum Sheets via Multi-cycle CSP: Experimental and FEM-Based Strain Analysis

  • 期刊论文

  • 发表日期：

    2026年5月5日

查看全文
  • Reza Khalilnezhad,
  • Vahid Pouyafar,
  • Ramin Meshkabadi

摘要

This study investigates a novel severe plastic deformation (SPD) technique—constrained studded pressing (CSP)—for refining grain structure in AA1100 aluminum sheets without altering their dimensions. Custom orthogonal-groove dies were developed, and samples underwent one to four CSP passes. Mechanical properties were evaluated via tensile and hardness tests, while microstructural evolution was examined using electron microscopy. Up to the third pass, yield strength rose from 118 to 225 MPa, ultimate tensile strength from 190 to 289 MPa, and hardness increased significantly, while elongation dropped from 15 to 3.6%. A slight decline in strength during the fourth pass was attributed to microcracks and grain boundary saturation. Finite element simulations accurately captured plastic strain distribution, revealing lower strain near sheet edges. Compared to conventional SPD methods like constrained groove pressing (CGP) and repetitive corrugation and straightening (RCS), CSP showed superior strain efficiency and more uniform grain refinement. These findings suggest that with proper die design and process control, CSP can significantly enhance the mechanical performance of aluminum sheets.