曹泽安,程东海,胡德安,陈益平,江训焱

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

采用置氢后淬火处理的方式来调节钛合金激光焊接接头的组织结构,旨在改善钛合金激光焊接接头在超塑性变形过程中的不均匀性,通过高温拉伸试验对氢热处理后的钛合金激光焊接接头超塑性变形峰值流变应力、伸长率、变形均匀性展开研究。结果表明:氢热处理能够改善接头超塑性变形均匀性,随着淬火温度的升高,接头变形峰值流变应力增大,伸长率降低;随着变形温度的升高,接头变形峰值流变应力减小,伸长率减小;随着变形速率的下降,接头变形峰值流变应力减小,伸长率增加。采用焊缝与母材截面收缩率的比值来表征接头的变形均匀性,在置氢量为0.05 mass%、淬火温度为980℃和在920℃以10~(-4) s~(-1)应变速率变形时,此时接头变形均匀化系数K为0.793。

关键词(KeyWords)： TC4合金;氢热处理;均匀性;超塑性变形

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51465042)

作者(Author): 曹泽安,程东海,胡德安,陈益平,江训焱

DOI: 10.13289/j.issn.1009-6264.2018-0270

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