摘要
在测试不同固溶时效阶段Cu-Cr-Zr合金力学性能和导电性能的基础上,采用金相显微镜(OM)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察了合金的显微组织,发现经过490℃/240min时效处理后合金达到时效强度峰值,强度的提高主要是共格弥散强化相造成。运用Gerold及其推导公式计算了共格强化导致的最大拉伸应力增量(△σcsmax)的范围,同时应用单元体导电模型和马提申定则计算了合金时效时的导电率的增量值范围,与实验数值相比误差较小。说明所建模型能较好的反映时效析出过程中的强度和导电率变化。
The hardness, tensile properties and electrical conductivity of Cu-0.8Cr-0.2Zr alloy in different solution and aging treatments were tested and corresponding microstructures were observed by Optical Microscopy （OM） , Scanning Electron Microscopy （SEM） and Transmission Electron Microscopy （TEM）. It was found that the alloy aging treated at 490℃ for 4h had obtained peak strength and the coherent dispersion strengthening was proved to be the major factor contributing to the improvement of strength. Respectively, the degree of coherent strengthening was almost identical with that calculated by Gerold eguation and electric conductivity of Cu-Cr -Zr alloy was feasible to account by model of conductive unit body.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2009年第4期1680-1685,共6页
Journal of Astronautics
基金
科技部国际合作重点项目(2006DFA53240)
湖南省国际合作重点项目(05WK2004)
关键词
CU-CR-ZR合金
固溶时效
显微组织
力学性能
导电率
Cu-Cr-Zr alloy
Solution and aging treatment
Microstructures
Mechanical properties
Electrical conductivity
