Effect of lanthanum-praseodymium-cerium mischmetal on mechanical properties and microstructure of Mg-Al alloys |
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Authors: | Yong Yi Yongge Fan and Yongjian Tang |
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Affiliation: | YI Yong1, 2, FAN Yongge2, TANG Yongjian1 (1. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900,China; 2.School of Materials Science & Engineering, Southwest University of Science & Technology, Mianyang 621010, China) |
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Abstract: | The effects of lanthanum-praseodymium-cerium mischmetal (LPC) on the microstructure and mechanical properties of Mg-Al alloy
were investigated. With the addition of LPC, an additional rod-like Al11La3 phase was deposited in the alloy. LPC greatly improves the tensile strength of cast Mg-Al alloys but negatively affects the
elongation of cast alloys above 473 K. Cast alloys are strengthened by both precipitation strengthening and dispersion strengthening
at ambient temperature. When the temperature exceeds 473 K, only the dispersion operates as a strengthening mechanism. |
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Keywords: | lanthanum-praseodymium-cerium mischmetal Mg-alloy microstructure mechanical properties |
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