Ultra-high strength Mg-Li alloy with B2 particles and spinodal decomposition zones

作     者：Shun Zhang Ruizhi Wu Feng Zhong Xiaochun Ma Xiang Wang Qiang Wu Shun Zhang;Ruizhi Wu;Feng Zhong;Xiaochun Ma;Xiang Wang;Qiang Wu

作者机构：Key Laboratory of Superlight Materials&Surface Technology(Ministry of Education)Harbin Engineering UniversityHarbin 150001China College of ScienceHeihe UniversityHeihe 164300China 

出 版 物：《Fundamental Research》 (自然科学基础研究（英文版）)

年 卷 期：2023年第3卷第3期

页      面：430-433页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foun-dation of China(51771060,51871068,51971071,52011530025,and U21A2049) Domain Foundation of Equipment Advance Research of 13th Five-year Plan(61409220118) the Fundamental Research Funds for the Central Universities(3072020CFT1006) Zhejiang Province Key Research and Development Program(2021C01086). 

主　　题：Mg-Li alloy Alloying Zn Semi-coherent B2 structure Solid solution strengthening Natural aging strengthening 

摘      要：The bcc-structured Mg-Li alloy is currently the engineering metallic material with the lowest density,but it has not been widely used due to its low strength.In this paper,alloying Zn effectively improves the strength of the bcc-structured Mg-Li alloy.Due to the semi-coherent B2 structured nanoparticles,the compressive yield strength of the as-cast Mg-13Li-9Zn alloy reaches higher than 300 MPa.Due to the solid solution strengthening of Zn and the spinodal zone,the compressive yield strength of the as-quenched Mg-13Li-15Zn(LZ1315)alloy immediately increases to 400 MPa.In addition,the as-quenched LZ1315 alloy exhibits natural aging strengthening behavior.Due to the precipitation of B2 nanoparticles,the yield strength of the peak aged alloy is up to 495 MPa.