袁大庆,董洪波,邹忠波,徐远刚

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

采用Gleeble3500对TB8钛合金进行等温恒应变速率热模拟压缩试验,研究该合金在温度750~900℃、应变速率0.001~10 s-1热变形参数范围内基于Murty判据的加工图,并分析TB8钛合金的热变形行为。结果表明:TB8钛合金的失稳变形区为:温度750~780℃,应变速率0.03~10 s-1;温度780~900℃,0.35~10 s-1,发生失稳变形后的组织特征为局部流动及β相晶粒的不均匀变形。较佳的稳定变形区为:温度815~885℃、应变速率0.03~0.1 s-1,发生稳定变形后的组织为动态再结晶后的等轴组织。结合预测的稳定变形区及显微组织特征可知,在单相区850℃变形时,0.1 s-1作为动态回复及动态再结晶的临界应变速率。

关键词(KeyWords)： TB8钛合金;Murty判据;加工图;变形区

Abstract:

Keywords:

基金项目(Foundation): 航空科学基金项目(2015ZE56011);; 江西省科学计划项目(20151BBE50042)

作者(Author): 袁大庆,董洪波,邹忠波,徐远刚

DOI: 10.13289/j.issn.1009-6264.2016.11.013

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