Scholarlink

<p>Dynamic supporting and pin-penetrating friction stir welding (DSPFSW) is employed to eliminate root defects in FSWed titanium alloy. Ti-4Al-0.005B alloy joints were produced via conventional FSW (CFSW) and DSPFSW, and examinations on macrostructure, microstructure and mechanical properties were carried out. Results reveal that DSPFSW significantly improves the peak temperature to above α-β transus point in the middle and upper parts of stir zone (SZ) at 60&#xa0;mm/min, thereby enhancing material flow. Adding that pin tip is located out of joint during welding, flow-related cavity defect and lack of penetration are completely avoided. Specifically, DSPFSW enables high-strength defect-free joint at 250 r/min with a welding speed of 60&#xa0;mm/min (100% higher than CFSW). The ultimate tensile strength and associated elongation reach 99.2 and 41.7% of BM, respectively. Furthermore, intact welds were produced by DSPFSW in a length of 0.68&#xa0;m regardless of the material loss around pin tip, so it is believed that DSPFSW has the potential to promote the application of FSW in the joining of titanium alloys.</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

The Performance of Dynamic Supporting and Pin-Penetrating Friction Stir Welding in the Joining of Ti-4Al-0.005B Alloy

  • 期刊论文

  • 发表日期：

    2025年4月23日

查看全文
  • Shuaishuai Du,
  • Huijie Liu,
  • Yisong Gao,
  • Renche Wang,
  • Xingmei Feng,
  • Yan Yu,
  • Fuyang Gao

摘要

Dynamic supporting and pin-penetrating friction stir welding (DSPFSW) is employed to eliminate root defects in FSWed titanium alloy. Ti-4Al-0.005B alloy joints were produced via conventional FSW (CFSW) and DSPFSW, and examinations on macrostructure, microstructure and mechanical properties were carried out. Results reveal that DSPFSW significantly improves the peak temperature to above α-β transus point in the middle and upper parts of stir zone (SZ) at 60 mm/min, thereby enhancing material flow. Adding that pin tip is located out of joint during welding, flow-related cavity defect and lack of penetration are completely avoided. Specifically, DSPFSW enables high-strength defect-free joint at 250 r/min with a welding speed of 60 mm/min (100% higher than CFSW). The ultimate tensile strength and associated elongation reach 99.2 and 41.7% of BM, respectively. Furthermore, intact welds were produced by DSPFSW in a length of 0.68 m regardless of the material loss around pin tip, so it is believed that DSPFSW has the potential to promote the application of FSW in the joining of titanium alloys.