梁运兴,王龙祥,魏志坚,徐平伟,梁宇

• 1:贵州大学贵州省材料结构与强度重点实验室
• 2:高性能金属结构材料与制造技术国家地方联合工程实验室
• 3:贵州安大航空锻造有限责任公司

摘要(Abstract)：

基于热变形实验,在Gleeble3500热模拟试验机上对TA19闪光焊接试样,在变形温度900～980℃,变形速率0.01～1 s~(-1)以及变形量30%和60%的条件下进行等温恒定速率压缩试验。结果表明:在变形速率0.01 s~(-1),980℃下压缩60%的变形试样经930℃×1 h+590℃×4 h空冷(AC)的再结晶退火后,试样的焊缝组织由魏氏组织向等轴组织转变。采用Deform3D软件对试样焊缝变形过程进行模拟,通过点追踪功能获得试样焊缝位置的真实应变量变化规律。以焊缝真实应变为基础,建立了适用于优化TA19闪光焊接组织的热压缩本构方程。该本构方程与实验结果吻合程度较高,误差约为3.31%。

关键词(KeyWords)： 钛合金;闪光焊;热变形;本构方程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(No.51761003);; 贵州省重大基础研究项目(黔科合JZ字[2014]2003)

作者(Author): 梁运兴,王龙祥,魏志坚,徐平伟,梁宇

DOI: 10.13289/j.issn.1009-6264.2019-0005

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