刘俊伟,刘军,鲁世强,万俊,徐勇

• 1:南昌航空大学江西省金属材料微结构调控重点实验室

摘要(Abstract)：

研究了热等静压态TiNiNb合金的热变形行为,并探究了变形温度及应变速率对其热变形行为的影响,同时建立了本构方程。结果表明:热等静态TiNiNb合金的热变形激活能为200.448 kJ/mol;变形温度及变形速率对热等静压态TiNiNb合金流变应力有显著的影响,峰值应力随变形温度上升而减小,随应变速率上升而增大;将非晶态的预合金粉末经热等静压制成的TiNiNb合金微观组织中可以观察到TiNi基体相,β-Nb相及少量的(Ti,Nb)_2Ni相。在热压缩过程中,变形温度上升、应变速率增加均会使TiNi基体相的含量略微增加,β-Nb相的含量有所减少。

关键词(KeyWords)： TiNiNb合金;微观组织;热变形激活能;高温压缩;本构方程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51504138,51674118);; 中国航空基金(2016ZF56027);; 江西省科技支撑计划(20141122040007);; 江西省自然科学基金(20171BAB206002);; 江西教育厅科技项目(GJJ150726);; 江西省金属材料微结构调控重点实验室开放课题(EJ201701515);; 江西省“百人远航工程”项目和江西省升级研究生教改课题(JXYJG-2016-133)

作者(Author): 刘俊伟,刘军,鲁世强,万俊,徐勇

DOI: 10.13289/j.issn.1009-6264.2018-0255

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