Effect of La on the Structure and Properties of Zn-Al2 Alloy
Author of the article:LIU Mingyang;LI Xintao;LI Jilin;ZHOU Nan
Author's Workplace：Institute of Material and Forming Technology of Guangdong Province,Guangzhou 510651,China;School of Material Science and Engineering,Xi'an University of Technology,Xi'an 710048,China
Key Words：Zn-Al2 alloy rare-earth element La fied microstructure mechanical properties
Abstract：
Zn-Al2 alloy with different La content was prepared by iron mold casting.The effect of different La content on the microstructure,rare earth phase morphology and mechanical properties of Zn-Al2 alloy was studied by optical microscope,scanning electron microscope and tensile tester.The results show that with the addition of La,the size of the primary phase η becomes smaller,the grain size is refined,and the mechanical properties are improved.When the La content of exceeds 0.03%,the primary phase η transformation is larger,the size of rare earth compounds increases,and it tends to concentrate near the grain boundary,which leads to the decrease of mechanical properties.When the La content of rare earth is 0.03%,the mechanical properties are the best.The tensile strength,yield strength and elongation are 262.73mpa,246.46mpa and 49.5%,respectively.
