Scholarlink

<p>This study aimed to investigate the effects of cold cutting on kerf temperature and product properties based on laser cold cutting to facilitate in situ, splash-free, precise, efficient, and standardized processing of 2A12 aluminum alloy-based structures in aircraft. The results indicated that the kerf temperature could be controlled at a temperature below 150°C. The tensile strength and elongation at break of specimens formed by laser cold cutting were 439 MPa and 8.0%, respectively, reaching 91% and 65% of those of the base material (483 MPa and 12.3%). The fracture exhibited typical edge cracking and mixed-mode fracture (transverse and oblique). The transverse section was characterized by abundant shallow dimples, small dimple tear bands, “quasi-cleavage” facets, and rough torn surfaces. The oblique section narrowed significantly along the thickness direction and was characterized by dimples of varying sizes, tear ridges, and grain facets. The fatigue strength was 98.58 MPa, which was 93% of that of the base material (106 MPa). Additionally, the fatigue fracture surface exhibited a cleavage-like appearance, comprising abundant steps and facets, as well as smooth 3- to 5-μm circular pores; no distinct fatigue striations or dimples were observed. This featured brittle fatigue crack propagation.</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

Effects of Splash-Free Laser Cold Cutting on the Mechanical Properties and Fatigue Endurance of 2A12 Al Alloy

  • 期刊论文

  • 发表日期：

    2026年1月1日

查看全文
  • A. Y. Cui,
  • W. Q. Sun,
  • B. R. Shan,
  • H. K. Wei,
  • Z. Z. Wang

摘要

This study aimed to investigate the effects of cold cutting on kerf temperature and product properties based on laser cold cutting to facilitate in situ, splash-free, precise, efficient, and standardized processing of 2A12 aluminum alloy-based structures in aircraft. The results indicated that the kerf temperature could be controlled at a temperature below 150°C. The tensile strength and elongation at break of specimens formed by laser cold cutting were 439 MPa and 8.0%, respectively, reaching 91% and 65% of those of the base material (483 MPa and 12.3%). The fracture exhibited typical edge cracking and mixed-mode fracture (transverse and oblique). The transverse section was characterized by abundant shallow dimples, small dimple tear bands, “quasi-cleavage” facets, and rough torn surfaces. The oblique section narrowed significantly along the thickness direction and was characterized by dimples of varying sizes, tear ridges, and grain facets. The fatigue strength was 98.58 MPa, which was 93% of that of the base material (106 MPa). Additionally, the fatigue fracture surface exhibited a cleavage-like appearance, comprising abundant steps and facets, as well as smooth 3- to 5-μm circular pores; no distinct fatigue striations or dimples were observed. This featured brittle fatigue crack propagation.