摘要
针对月球环境温度变化情形，研究了长时间低温浸泡（-196℃）和多次高低温交变循环处理（-196～200℃）对挤压态AZ31镁合金在20℃下的力学性能、显微组织以及断口形貌的影响。研究表明：AZ31镁合金经过长时间液氮浸泡和高低温交变循环处理后，力学性能无明显变化；室温态合金的％和6分别为288MPa和18．3％，经过10d低温浸泡后ob和o分别为292MPa和18．7％，经过10次高低温循环后合金的ob和巧分别为294MPa和16．9％；低温和高低温交变处理对断口形貌和相组成没有明显影响，均为准解理断裂。
In view of the lunar environment temperature change situation, the influence of long time low temperature immersion （-196℃） and high-low temperature alternation processing （-196-200 ℃） on the mechanical properties, microstructures and fracture surfaces of AZ31 magnesium alloy at 20 ℃ was studied. The results indicate that there are no significant changes on the mechanical properties of AZ31 magnesium alloy after liquid nitrogen immersion or temperature alternation cycle treatment. The trb and o of AZ31 magnesium alloy at room temperature are 288 MPa and 18.3%, respectively, after 10 d cryogenic processing, they will reach 292 MPa and 18.7%, respectively, ob and p after 10 times high-low temperature alternation processing are 294 MPa and 16.9%, individually. SEM observation and XRD results show that the fracture surface and phase constitutions do not change obviously after low temperature or high-low temoerature alternation orocessin~. And the fractures are both quasi-cleavage crack.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2011年第12期2979-2986,共8页
The Chinese Journal of Nonferrous Metals
基金
国家重点基础研究发展计划资助项目(2007CB613701)
国家高技术研究计划资助项目(2009AA033501)
中国航天科技集团公司航天科技创新基金资助项目(0502)
关键词
AZ31镁合金
月球环境温度
力学性能
微观组织
AZ31 magnesium alloy
lunar environment temperature
mechanical properties
microstructures
