欧阳德来,崔霞,鲁世强,徐勇

• 1:南昌航空大学材料科学与工程学院
• 2:南昌航空大学航空制造学院

摘要(Abstract)：

采用Thermecmaster-Z型热/力模拟试验机在变形温度为825～1125℃,应变速率为0.001～1 s~(-1)条件下对Ti-10V-2Al-3Fe合金进行热模拟压缩实验,分析了热变形参数对其流变行为的影响,并通过加工硬化率方法研究了该合金的动态再结晶临界条件。结果表明:合金的流变应力随变形温度的降低或应变速率的提高而增大;通过lnθ～ε曲线出现拐点及dlnθ/dε～ε曲线出现最小值判据,确定了该合金的动态再结晶临界应变;动态再结晶临界应变随应变速率的增大及变形温度的降低而增加;Z参数方程能较好地反映合金动态再结晶临界应变与热变形条件间的关系,动态再结晶临界应变与Z参数间的关系可表示为ε_c=2.6735×10~(-2)Z~(0.0817);临界应变与峰值应变之间存在线性关系,即ε_c=0.508ε_p。

关键词(KeyWords)： Ti-10V-2Al-3Fe合金;加工硬化率;动态再结晶;临界条件

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助(51761029,51864035);; 江西省教育厅科学基金项目(GJJ160683)

作者(Author): 欧阳德来,崔霞,鲁世强,徐勇

DOI: 10.13289/j.issn.1009-6264.2018-0385

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