与等温暴露相关的AlSi10Mg（Cu）合金的微观结构演变

Microstructure Evolution of AlSi10Mg(Cu) Alloy Related to Isothermal Exposure.

作者信息

Cai Cheng, Geng Huifang, Wang Shifu, Gong Boxue, Zhang Zheng

机构信息

Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China.

The Collaborative Innovation Center for Advanced Aero-Engine (CICAAE), Beijing University of Aeronautics and Astronautics, Beijing 100191, China.

出版信息

Materials (Basel). 2018 May 16;11(5):809. doi: 10.3390/ma11050809.

DOI:10.3390/ma11050809

PMID:29772678

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5978186/

Abstract

The mechanical properties and corrosion resistance changes of AlSi10Mg(Cu) alloy under different isothermal exposure conditions have been investigated by tensile experiments and electrochemical testing. The results show that isothermal exposure has a significant influence on the mechanical properties and corrosion resistance. Tensile strength is more sensitive to the higher exposure temperature, while the corrosion resistance is greater affected by the lower exposure temperature and shorter time. Microstructure evolution of AlSi10Mg(Cu) alloy related to different isothermal exposure condition has also been studied by using transmission electron microscopy (TEM). The results indicate that the isothermal exposure changed the type and density of nanoscale precipitates in the alloy, which in turn induced the change of performance of the alloy.

摘要

通过拉伸试验和电化学测试，研究了AlSi10Mg（Cu）合金在不同等温暴露条件下的力学性能和耐蚀性变化。结果表明，等温暴露对力学性能和耐蚀性有显著影响。抗拉强度对较高的暴露温度更为敏感，而耐蚀性受较低的暴露温度和较短的时间影响更大。还利用透射电子显微镜（TEM）研究了AlSi10Mg（Cu）合金在不同等温暴露条件下的微观结构演变。结果表明，等温暴露改变了合金中纳米级析出相的类型和密度，进而导致合金性能的变化。