董显娟,鲁世强,李鑫,王克鲁,肖璇

• 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)：

分别以1020℃保温30min后空冷和炉冷得到的TA15合金为原材料,对其进行等温恒应变速率压缩试验,研究了温度800～950℃、应变速率0.001～1s-1、真应变0.51～1.20时,不同原始α片层厚度对TA15合金动态球化行为的影响。结果表明:真应力-真应变曲线均呈现出明显的流动软化,峰值应力和流动软化率对α片层厚度的依赖程度较小。当热变形参数相同时,细片状比粗片状组织更容易发生动态球化,这与其在试验范围内测得的变形激活能分别为597kJ/mol和650kJ/mol是一致的。TA15合金中片状α除了形成低和高角度界面及强烈的局部剪切带导致动态球化外,还有动态再结晶等其它方式。

关键词(KeyWords)： TA15合金;α片层厚度;流动软化;动态球化;激活能

Abstract:

Keywords:

基金项目(Foundation): 江西省自然科学基金(2008GZC0041);; 江西省教育厅科技项目(GJJ08203)

作者(Author): 董显娟,鲁世强,李鑫,王克鲁,肖璇

DOI: 10.13289/j.issn.1009-6264.2010.04.008

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