TC4与TA15钛合金氩弧焊疲劳特性对比分析

Comparison of fatigue property for TIG welding of TC4 and TA15 tianium alloy

关键词:  钛合金  焊接  疲劳

Key words:  Titanium  weld  fatigue

摘要:

选用TC4和TA15的氩弧焊焊接件作为研究对象,分别进行4个应力水平下的恒幅疲劳试验。依据文建立的三参数疲劳寿命模型对试验结果进行对比分析,TA15的氩弧焊的疲劳性在10⁴~10⁶范围内略优于TC4氩弧焊,并讨论了可能的影响因素。

Abstract:

As the researched objects, TIG welded test specimens of titanium TC4 and TA15 were selected, and their fatigue tests were done under different constant amplitude spectrums with four stress levels, respectively. According to the contrast analysis for the fatigue test results by use of three-parameter-model of fatigue life founded in this paper, the fatigue property of TA15 TIG weld was better than TC4 TIG weld appreciably in 10⁴-10⁶ region.The possible affected factors were discussed.