Zn-10Cu-02Ti合金高温拉伸蠕变行为.doc

Zn--
张喜民1 肖来荣1,2王艳1 孙泉胜1 殷傲宇1 耿占吉基金项目:国家科技支撑计划(编号:2009BAE71B00)
作者简介:张喜民,男,硕士;研究方向:变形锌合金
通讯作者:肖来荣,男,博士,教授;电话:0731-88877499;Email:******@.
(,湖南长沙 410083;,湖南长沙 410083)
摘要:采用熔铸、挤压的方法制备了Zn--,通过蠕变试验机测定了合金的拉伸蠕变性能,借助SEM、TEM、EDS等手段对合金蠕变前后显微组织进行了观察和分析。结果表明:Zn--,稳态蠕变速率分别与应力的对数和温度倒数1/T均有较好的线性关系。在不同温度和应力条件下,合金的应力指数和蠕变表观激活能相差不大,。Zn--,晶界处的第二相颗粒能够阻碍晶界的滑移和位错的运动从而提高合金的抗蠕变性能。
关键词: Zn--;拉伸蠕变;显微组织;抗蠕变性能
Tensile creep behavior at high temperature of Zn-- alloy
ZHANG Ximin, XIAO Lairong, WANG Yan, SUN Quansheng,
YIN Aoyu, GENG Zhanji
( of Materials Science and Engineering, Central South University, Changsha, 410083,China; Laboratory of Non-ferrous Materials Science and Engineering of Ministry of Education, Central South University, Changsha, 410083,China)
Abstract: Zn-- alloy was prepared by casting and extruding processes. Tensile creep property was investigated by creep test machine. Microstructures of the alloy before and after creeping were observed and analyzed by SEM、TEM、EDS. The results show that the steady creep rate increases with the increase of temperature or stress. The logarithm of steady creep rate is linearly to the logarithm of the stress lnσ or reciprocal of temperatur