曹泽安,陈益平,程东海,胡德安,江训焱

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

通过高温拉伸试验研究了不同淬火温度及变形条件下TC4钛合金激光焊接接头的显微组织和超塑性变形均匀性,并引入焊缝与母材截面收缩率的比值(K)来表征接头的超塑性变形均匀性。结果表明:当变形条件相同时,随淬火温度升高,接头超塑性变形后,焊缝中的针状马氏体转变为片层状组织,母材从原始的α和β双相组织转变为单一的β相组织;淬火处理能够提高接头的超塑性变形均匀性,增加接头中的β相含量,随着淬火温度的升高接头的超塑性变形均匀性上升;淬火温度保持不变时,接头的超塑性变形均匀性随着变形温度的上升而增加,随着变形速率的上升而减少;当淬火温度为1000℃,变形温度为940℃及变形速率为10~(-4)s~(-1)时,接头的变形均匀性达到最大(K=0.9269)。

关键词(KeyWords)： 钛合金;淬火处理;均匀性;超塑性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51465042)

作者(Author): 曹泽安,陈益平,程东海,胡德安,江训焱

DOI: 10.13289/j.issn.1009-6264.2018-0395

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