应变速率对TA15钛合金β热变形动态再结晶组织的影响  

Effect of strain rate on dynamic recrystallization microstructures of β hot process for TA15 titanium alloy

作　　者：吴超[1] 鲁世强[1] 欧阳德来[1] 

机构地区：[1]南昌航空大学材料学院塑性工程系,南昌330063

出　　处：《塑性工程学报》2009年第3期167-170,共4页Journal of Plasticity Engineering

基　　金：江西省自然科学基金资助项目(2007GQC1575);江西省教育厅科技资助项目(GJJ08203);江西省材料科学与工程研究中心预研基金资助项目(ZX200601002)

摘　　要：采用THERMECMASTER-Z型热模拟实验机对TA15钛合金在变形温度1050℃,应变速率0.001s-1～1s-1,真应变0.03～1.2范围内进行了等温恒应变速率压缩实验。结果表明,提高应变速率能够明显细化晶粒,在低应变速率(0.001s-1,0.01s-1)下,提高应变速率对晶粒细化的程度较大;从晶粒细化效果及组织均匀性考虑,较佳的应变速率为0.01s-1。Isothermal constant strain rate compression tests on TA15 alloy were carried out in the strain rate range of 0. 001s^-1- 10s^-1 and true stress range of 0.03- 1.2 by using the THERMECMASTER-Z hot working simulator at temperature 1050℃. The results of experiments indicate that improving strain rate could obviously decrease the average grain size, and when the strain rates are in lower level （0. 001s^-1 , 0.01s^-1）, increasing the strain rate could make grain size down faster. According to the effect of grain refinement and uniformity in the microstructures which deformed under various conditions, the strain rate of 0.01s^-1 is preferable for hot working.

关 键 词：TA15钛合金 应变速率 动态再结晶 微观组织 

分 类 号：TG311[金属学及工艺—金属压力加工] TG314