Solid state recycling of Mg-Gd-Y-Zn-Zr alloy chips by isothermal sintering and equal channel angular pressing

作     者：Yanbo Pei Hongjun Ma Meng Yuan Bugang Teng Yanbo Pei;Hongjun Ma;Meng Yuan;Bugang Teng

作者机构：School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China National Key Laboratory for Precision Hot Processing of MetalsHarbin Institute of TechnologyHarbin 150001China 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2024年第12卷第7期

页      面：2725-2740页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：supported by the fund of the National Natural Science Foundation of China(51875127 52275322) 

主　　题：Mg-Gd-Y-Zn-Zr alloy Solid state recycling Microstructure evolution LPSO phase Equal channel angular pressing 

摘      要：The Mg-7Gd-4Y-2Zn-0.5Zr alloy chips were successfully recycled through isothermal sintering and equal channel angular pressing(ECAP).The mechanical properties and microstructure evolution of samples during the recycling process were studied in *** eutectic phases in the as-cast alloy transform into long period-stacking ordered(LPSO)phases after homogenization,which can improve the plasticity of the *** isothermal sintering,the density of the sample is lower than that of the homogenized sample,and oxide films are formed adjacent to the bonding interface of the metal ***,the plasticity of the sintered sample is *** samples are fabricated after *** the grains are not refined compared to the sintered sample,the microstructure becomes more uniform due to *** interdendritic LPSO phase and kinked 14H-LPSO phase are formed in the alloy due to the shear deformation during the ECAP process,which improves the strength and plasticity of the sample ***,the basal texture is weakened due to the Bc route of the ECAP process,which can increase the Schmid factor of the basal slip system and improve the elongation of the *** 2 ECAP passes,the fully densified recycled billet shows superior mechanical properties with an ultimate tensile strength of 307.1 MPa and elongation of 11.1%.