Effects of CeO_(2)Content on the Microstructure and Mechanical Properties of ZK60 Mg Alloy  

作　　者：Wei Qiu Shuang-Long Li Zhao-Yuan Lu Sen-Mao Zhang Jian Chen Wei Chen Lang Gan Wei Li Yan-Jie Ren Jun Luo Mao-Hai Yao Wen Xie 

机构地区：[1]School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410114,China [2]Key Laboratory of Energy Efficiency and Clean Utilization,The Education Department of Hunan Province,Changsha University of Science and Technology,Changsha 410114,China [3]School of Mechanical&Energy Engineering,Zhejiang University of Science and Technology,Hangzhou 310023,China [4]Hunan Provincial Key Laboratory of Vehicle Power and Transmission System,Hunan Institute of Engineering,Xiangtan 411104,China [5]Hunan Rare Earth Metal Material Research Institute,Institute of Rare Earth Light Alloys,Changsha 410126,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2025年第2期287-298,共12页金属学报(英文版)

基　　金：the financial supports from the National Natural Science Foundation of China(Nos.52171099,51301025,51140001);the Education Department of Hunan Province of China(No.22A0240);the State Key Laboratory of Disaster Prevention&Reduction for Power Grid,Changsha University of Science&Technology.

摘　　要：This study primarily investigates the effect of CeO_(2)content on the microstructure and mechanical properties of ZK60 Mg alloy.The results indicate that CeO_(2)can be reduced by Mg to elemental Ce,predominantly in the form of the Mg-Zn-Ce phase.The addition of CeO_(2)notably refines the grain size of as-cast ZK60 Mg alloy,with the Mg-Zn-Ce phase primarily distributed along grain boundaries.After extrusion,grain size increases and then decreases with increasing CeO_(2)content,while the dynamic recrystallization(DRX)fraction gradually reduces.This behavior is chiefly attributed to the hindrance of the DRX process by a high density of second phases and the restriction of recrystallized grains growth by fine particles.The basal texture intensity increases progressively with the addition of CeO_(2).As the CeO_(2)content rises,the yield strength(YS)and elongation(EL)of the alloys show significant improvement.The increase in YS is mainly due to the combined effects of grain refinement strengthening and dispersion strengthening.In contrast,the enhanced EL is closely related to the heterogeneous structure of the grains.Notably,the ZK60-1.2CeO_(2)alloy exhibits the ultimate tensile strength,YS and EL of 274 MPa,160 MPa and 17.3%,respectively.

关 键 词：Magnesium alloy Rare earth oxides MICROSTRUCTURE Mechanical property 

分 类 号：TG146.21[一般工业技术—材料科学与工程]