Fatigue Behavior of LF2 Aluminum Alloy Joint for Stirring Friction Welding

Wang Xunhong~1; Wang Kuaishe~ 1; Xu Kewei~2; Hu Kai~3

Views : 0 下载量: 268 CSCD: 2

Export
Share
Collection
Album

Fatigue Behavior of LF2 Aluminum Alloy Joint for Stirring Friction Welding
Issue 6, Pages: 378-380(2006)
Published： 2006 ，
DOI：

扫描看全文

[1]王训宏,王快社,徐可为,胡锴.LF2铝合金搅拌摩擦焊接头的疲劳特性[J].特种铸造及有色合金,2006(06):378-380+320.

Wang Xunhong~1, Wang Kuaishe~ 1, Xu Kewei~2, et al. Fatigue Behavior of LF2 Aluminum Alloy Joint for Stirring Friction Welding. [J]. Special Casting & Nonferrous Alloys (6):378-380(2006)
[1]王训宏,王快社,徐可为,胡锴.LF2铝合金搅拌摩擦焊接头的疲劳特性[J].特种铸造及有色合金,2006(06):378-380+320. DOI：

Wang Xunhong~1, Wang Kuaishe~ 1, Xu Kewei~2, et al. Fatigue Behavior of LF2 Aluminum Alloy Joint for Stirring Friction Welding. [J]. Special Casting & Nonferrous Alloys (6):378-380(2006) DOI：

摘要

对LF2铝合金搅拌摩擦焊接头的疲劳特性进行了研究

建立了焊接头的SN曲线。疲劳试验结果表明

搅拌摩擦焊接头表现出良好的疲劳性能

疲劳寿命N=106次的疲劳强度值约为59～65MPa。搅拌摩擦焊接头具有细小的等轴晶粒和狭窄的热影响区

阻碍了滑移带的形成和裂纹的扩展

从而提高了接头的疲劳性能。疲劳断口分析显示

随着驻留滑移带的扩展逐渐萌生裂纹

在交变应力作用下最终导致失效。

Abstract

S-N curves of welding joint were established by investigating fatigue behavior of LF2 aluminum alloy joint for stirring friction welding. The experimental results show that fatigue strength of stirring friction welding joint is about 59

5 MPa at fatigue life N=10

showing excellent fatigue behavior. Fatigue behavior of the joint was improved due to fine equiaxed grain and narrow heat effect zone inhibiting formation of slide-zone and propagation of crack. Fatigue fracture analysis shows that failure occurs at the condition of alternative stress with crack formation resulting from propagation of stayed slide zone.