纳米压痕法表征镁合金固溶强化行为  

Characterization of Solid Solution Strengthening Behavior of Magnesium Alloy Utilizing Nanoindentation

作　　者：郭非 祝寒 张震 赖红良 席国强 麻彦龙[1] GUO Fei;ZHU Han;ZHANG Zhen;LAI Hongliang;XI Guoqiang;MA Yanlong(College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2020年第9期141-146,共6页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆市自然科学基金面上项目(cstc2019jcyj-msxm X0111)。

摘　　要：利用纳米压痕实验及反演算方法研究Zn元素、Gd元素对固溶镁合金力学性能的影响。结果显示:添加Zn、Gd元素均能提升镁合金弹性模量及弹性极限,Gd元素对合金力学行为的强化效果更为明显,Zn、Gd混合添加能更有效地提升合金中的固溶强化效果。同时,所用的反演算法能较好地利用纳米压痕测试结果获得以滑移为主的镁合金弹塑性力学本构,所获本构方程反映的力学性能与镁合金单向压缩结果吻合,反演算结果印证了镁合金固溶强化机理。因此,纳米压痕反演算法是一种可行的镁合金力学本构计算方法。In this paper,the effects of Zn and Gd additions on the mechanical properties of dilute magnesium alloys were analyzed using nanoindentation experiments and inverse calculation methods.The results show that the addition of Zn and Gd improved the elastic modulus and elastic limit of magnesium alloys.The solid solution strengthening of Gd was more obvious compared to the Zn.The mixed addition of Zn and Gd stimulated the solid solution strengthening in the alloy more effectively.At the same time,the inversion algorithm used to obtain the elastoplastic mechanical constitutive of the magnesium alloy deformed mainly by slip.The inversion calculation results were correlated to the solid solution strengthening calculation of magnesium alloys.Therefore,the nanoindentation inversion algorithm is a feasible method for calculating the magnesium alloy mechanical constitutive.

关 键 词：镁合金 纳米压痕 反演算法 固溶强化 

分 类 号：TG146.22[一般工业技术—材料科学与工程]