TiNiNb合金热变形流变行为的研究  

Hot Deformation Behavior of TiNiNb Alloy

作　　者：尹向前[1] 米绪军[1] 高宝东[1] 李艳锋[1] 

机构地区：[1]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088

出　　处：《稀有金属》2009年第6期921-924,共4页Chinese Journal of Rare Metals

摘　　要：采用Gleeble-1500热模拟试验机对TiNiNb合金进行了高温压缩变形实验，分析了该合金在变形温度为800—1050℃，应变速率为0．01～10s^-1条件下的变形行为及流变应力的变化规律。结果表明，流变应力受变形温度和应变速率显著影响，流变应力随变形温度的升高和应变速率的降低而降低。采用双曲正弦模型确定了该合金的变形激活能Q和应力指数n，建立了相应的热变形本构关系。Hot compression deformation of TiNiNb al- loy was performed on Gleeble-1500 under conditions of strains of 0.01 -10.0 s-1 and deformation temperatures of 800 - 1050 ℃, and flow stresses were investigated. The results showed that the true stress of TiNi-Nb alloy increased with the decrease of the deforma- tional temperature and the increase of the strain rate. The constitutive relation of TiNiNb alloy was obtained on the base of Arrhenius equations.

关 键 词：TINI合金 热变形 本构关系 

分 类 号：TG139.6[一般工业技术—材料科学与工程]