赵丽娟,魏科,黄骏,董显娟,黄龙,涂泽立

• 1:南昌航空大学航空制造工程学院
• 2:首尔国立大学材料科学与工程系&RIAM

摘要(Abstract)：

在变形温度为910～970℃、应变速率为0.01 s~(-1)、道次保温时间为1000 s、总应变为0.9条件下，对TA15钛合金进行了双道次热压缩实验，研究了第一道次应变为0.25、0.45、0.65时对合金热变形过程中静态软化行为的影响。结果表明：在不同第一道次应变分配下，除变形温度为910℃且应变为0.25时，合金在道次保温间隔后均出现了静态软化现象，即第二道次流动应力峰值均低于第一道次卸载应力；第一道次应变分配较高时，由于累积畸变能较多，软化程度更为明显；变形温度越接近相变点，第一道次应变对静态软化影响程度越大；微观组织分析表明，道次保温间隔后比保温前的初生α相体积分数明显减少，减小程度与静态软化程度呈正相关性。

关键词(KeyWords)： TA15钛合金;双道次热变形;第一道次应变分配;静态软化行为;组织演变

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52005241);; 江西省自然科学基金(20232BAB204050);; 国家留学基金委(202208360107);; 南昌航空大学研究生创新专项资金项目(YC2022-023)

作者(Author): 赵丽娟,魏科,黄骏,董显娟,黄龙,涂泽立

DOI: 10.13289/j.issn.1009-6264.2023-0448

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