Effect of Al on the mechanical properties and corrosion resistance of Pb-Al alloy

7th International Conference on Key Engineering Materials

材料科学;工业技术

Lu, Zhicheng^1 ; Liu, Zhenlin^1 ; Li, Yongliang^2 ; Wu, Dan^2 ; Wang, Fuming^2

China Electric Power Research Institute, Beijing

100192, China^1

University of Science and Technology Beijing, Beijing

100083, China^2

关键词: Al content;    Al rich phase;    Al-alloy;    Charpy v-notch impact tests;    Heterogeneous precipitation;    Impact energy;    Salt spray corrosion tests;    Twin structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/201/1/012045/pdf
DOI  :  10.1088/1757-899X/201/1/012045

来源: IOP

【 摘 要 】

A set of binary Pb-Al alloys with different Al contents were designed in this work. The mechanical properties and corrosion resistance of Pb-Al alloys were investigated with help of tensile test, Charpy V-notch impact test and salt spray corrosion test (SSCT). And the microstructure was observed by optical microscopy. The results showed that microstructure of all alloys were twin structure, and the twin structure was gradually refined with the increase of Al content. Al dissolved in matrix could significantly improve the tensile strength, impact energy and corrosion resistance. However, a higher content of Al would harm the mechanical properties and corrosion resistance. It may be due to the heterogeneous precipitation of Al rich phase.