欧阳德来,鲁世强,崔霞,吴超,董显娟

• 1:南京航空航天大学材料科学与技术学院
• 2:南昌航空大学材料科学与工程学院

摘要(Abstract)：

利用Thermecmaster-Z型热模拟试验机在β相区对TA15钛合金进行了热压缩试验,采用金相显微镜及EBSD取向差分析技术,研究了TA15钛合金β热变形中动态再结晶形核。结果表明,随内、外界条件的不同,TA15钛合金存在两类典型的动态再结晶形核地点,即晶界周围及变形带。相应地,随应变速率增大,存在两种动态再结晶形核机制,在较低应变速率下,晶界弓弯形核是动态再结晶的主要形核机制,晶界、三岔界是主要形核地点;在高应变速率下,动态再结晶不仅可以在晶界、三岔界附近形核,还可以借助变形带形核。此时的动态再结晶形核为晶界弓弯与亚晶旋转机制共同作用。

关键词(KeyWords)： TA15钛合金;热变形;动态再结晶;形核

Abstract:

Keywords:

基金项目(Foundation): 航空科学基金(2009ZE56014);; 江西省自然科学基金(2008GZC0041);; 江西省教育厅科技项基金(GJJ08203);; 南昌航空大学航空高校基金(EC200801145)

作者(Author): 欧阳德来,鲁世强,崔霞,吴超,董显娟

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