杨西荣,朱振,刘晓燕,罗雷,赵西成.超细晶工业纯锆的室温蠕变特性及断口分析[J].稀有金属材料与工程,2019,47(3):815~819.[YANG XIRONG,ZHU ZHEN,LIU XIAOYAN,LUO LEI,ZHAO XICHENG.Creep Behavior and Fracture of Ultra-Fine Grained Commercial Purity Zirconium at Ambient Temperature[J].Rare Metal Materials and Engineering,2019,47(3):815~819.]
超细晶工业纯锆的室温蠕变特性及断口分析
投稿时间:2017-07-20  修订日期:2017-09-26
中文关键词:  超细晶工业纯锆  蠕变  稳态蠕变速率  蠕变断裂  
基金项目:国家自然科学基金(51474170)、陕西省自然科学基金(2016JQ5026)和陕西省教育厅重点实验室科研计划项目(15JS058)联合资助
中文摘要:
      本文分别研究了超细晶工业纯锆在 0.875 Rp0.2、0.9 Rp0.2、0.9125 Rp0.2、0.925 Rp0.2、0.9375 Rp0.2、0.95 Rp0.2蠕变应力下的室温蠕变性能,计算了超细晶工业纯锆的稳态蠕变速率,并分析了其蠕变断裂机理。实验结果表明:超细晶工业纯锆在蠕变应力为0.875 Rp0.2时,出现了蠕变饱和现象,稳态蠕变速率随着蠕变应力的增加而增大,稳态蠕变阶段缩短;当蠕变应力为0.95 Rp0.2时,稳态蠕变速率达到最大值3.140×10-6s-1。通过计算蠕变应力指数,得到超细晶工业纯锆的室温蠕变机理为位错运动。超细晶工业纯锆室温蠕变断裂为韧性断裂。
Creep Behavior and Fracture of Ultra-Fine Grained Commercial Purity Zirconium at Ambient Temperature
英文关键词:UFG CP Zirconium, creep, steady state creep rate, creep fracture
英文摘要:
      The creep tests were carried out on Ultra-fine grained commercial purity zirconium under the stresses of 0.875 Rp0.2、0.9 Rp0.2、0.9125 Rp0.2、0.925 Rp0.2、0.9375 Rp0.2、0.95 Rp0.2 at ambient temperature. Steady state creep rate was calculated. The creep fracture of UFG CP Zr was investigated by SEM. A new expression was proposed which fit the creep of UFG CP Zr better. It was found that the creep saturation phenomenon happened under 0.875 Rp0.2; the steady state creep rate increased with the rise of creep stress which led the steady state creep stage shortening; the maximum of steady state creep rate was 3.140×10-6s-1 under 0.95 Rp0.2. According to the calculated creep stress exponent, the creep mechanism can be categorized into the dislocation motion. The creep fracture of UFG CP Zrwas ductile fracture.
作者单位E-mail
杨西荣 西安建筑科技大学冶金工程学院 lazy_yxr@qq.com 
朱振 西安建筑科技大学冶金工程学院 765420984@qq.com 
刘晓燕 西安建筑科技大学冶金工程学院  
罗雷 西安建筑科技大学冶金工程学院  
赵西成 西安建筑科技大学冶金工程学院  
摘要点击次数: 105
全文下载次数: 49
查看全文  查看/发表评论  
关闭