TA7钛合金高温流变行为研究  

Plastic Deformation Behavior of TA7 Titanium Alloy

作　　者：东赟鹏[1] 于秋颖[1] 方爽[1] 王淑云[1] 王超渊 宋晓俊[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《航空材料学报》2015年第1期13-19,共7页Journal of Aeronautical Materials

摘　　要：通过热压缩试验研究了TA7钛合金在变形温度850～ 1000℃、应变速率0.001～0.1s^-1条件下的流变应力变化规律,计算并建立了描述TA7钛合金高温变形特性的本构方程.结果表明：变形温度和应变速率对TA7钛合金流变应力影响显著,随变形温度升高和变形速率的降低,相同变形程度下合金的流变应力显著降低,并且在较低的应变下合金即可达到稳态流变状态.The flow stress of TAT titanium alloy was investigated by isothermal hot compression in the temperature range of 850-1000℃ and strain rate of 0. 001-0.1 s^-1. The constitutive equation for describing the plastic deformation behavior of the TA7 titanium alloy dur- ing hot compression process was deduced. The results show that the flow stress of the TAT titanium alloy is greatly affected by tempera- ture and strain rate. With the increase of the temperature and decrease of the strain rate, the flow stress of the TAT titanium alloy de- creases greatly, and the plastic deformation get into the steady-going condition state immediately under the condition of low flow stress.

关 键 词：TA7 钛合金 流变应力 本构方程 

分 类 号：TG146.23[一般工业技术—材料科学与工程]