董显娟,鲁世强,李鑫,王克鲁,欧阳德来

• 1:南昌航空大学"航空材料热加工技术"航空科技重点实验室
• 2:南昌航空大学航空制造工程学院
• 3:南昌航空大学材料科学与工程学院

摘要(Abstract)：

采用THERMECMASTOR-Z型热加工模拟实验机对网篮和魏氏两种片状组织TA15钛合金在α+β两相区温度750~950℃、应变速率0.001~10 s-1范围进行等温恒应变速率压缩实验,对压缩变形后试样进行了光学金相和透射电镜显微组织观察,并利用Jonas局部流动失稳参数预测了两种片状组织TA15钛合金的局部流动失稳行为。结果表明:两种片状组织TA15钛合金在α+β两相区低温(750~850℃)和高应变速率(0.1~10 s-1)范围变形时均会出现局部流动失稳,且局部流动失稳主要集中在原始β晶粒边界附近。当局部流动失稳参数大于5时,魏氏组织TA15钛合金会出现局部流动失稳;当局部流动失稳参数大于7时,网篮组织TA15钛合金才会出现局部流动失稳。发现用Jonas局部流动失稳参数预测合金局部流动失稳的发生还存在一定局限性。

关键词(KeyWords)： TA15钛合金;局部流动失稳;等轴化;失稳参数;原始β晶粒边界

Abstract:

Keywords:

基金项目(Foundation): 江西省自然科学基金(20122BAB216015);; 江西省教育厅青年科学基金项目(GJJ11160);; “航空材料热加工技术”航空科技重点实验室开放基金(Zk201001004);; 南昌航空大学博士启动基金(EA201103316)

作者(Author): 董显娟,鲁世强,李鑫,王克鲁,欧阳德来

DOI: 10.13289/j.issn.1009-6264.2013.10.034

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