应变速率和温度对炉冷态TA15钛合金在α+β两相区压缩变形行为的影响  

Effects of Strain Rate and Temperature on Compressive Deformation Behavior of TA15 Furnace Cooling State Titanium Alloy during α+β Two-phase Region

作　　者：方军[1] 王克鲁[1] 董显娟[1] 李鑫[1] 杨化娟[1] 

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《机械工程材料》2009年第2期9-11,15,共4页Materials For Mechanical Engineering

基　　金：江西省自然科学基金资助项目(2007GQC1575);江西省材料科学与工程研究中心预研基金资助项目(ZX200601002);南昌航空大学大学生科技创新基金资助项目(106004220054)

摘　　要：用Thermecmastor-Z型热模拟试验机对炉冷态TA15钛合金进行了变形温度为750～950℃、应变速率为0．001～10S叫的热压缩试验，研究了应变速率和温度对该合金在α＋β两相区流变应力和显微组织的影响。结果表明：随变形温度升高、应变速率降低，炉冷态TA15钛合金的流变应力下降；同时α相含量减少，晶内与晶界α相差别消失，α相发生球化；较佳的锻造工艺参数为温度850-950℃，应变速率0．001-0．01S^-1。The high temperature compression tests of furnace cooling state TA15 titanium alloy were carried on Thermecmastor-Z simulator in the temperature range of 750-- 950 ℃ and strain rate range of 0. 001 -- 10 s^-1. The influences of strain rate and temperature on the flow stress and microstrueture of the alloy were studied. The results show with the increase of temperature and decrease of strain rate, the flow stress of the alloy decreased, the α-phase content also decreased, deferences between the α-phase in grain and along the boundary disappeared, and part α-phase occured nodularization. The optimum forging parameters for TA15 titanium alloy were in the temperature range of 850--950 ℃ and strain rate range of 0. 001--0. 01 s^-1.

关 键 词：TA15钛合金 变形温度 应变速率 

分 类 号：TG146.2[一般工业技术—材料科学与工程]