Analysis of the hot deformation of ZK60 magnesium alloy

作     者：Amir Hadadzadeh Mary A.Wells 

作者机构：Mechanical and Mechatronics Engineering DepartmentUniversity of WaterlooWaterlooON N2L 3G1Canada 

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

年 卷 期：2017年第5卷第4期

页      面：369-387页

核心收录：

学科分类：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）] 

基　　金：support of the Natural Sciences and Engineering Research Council of Canada(NSERC) Automotive Partnership Canada(APC)program under APCPJ 459269-13 grant with contributions from CanmetMATERIALS Multimatic Technical Centre Ford Motor Company and Centerline Windsor 

主　　题：ZK60 magnesium alloy Hot deformation Constitutive modeling Zener-Hollomon Hyperbolic sine Ludwig equation 

摘      要：Hot deformation of cast-homogenized and extruded(in both the extrusion and transverse directions)ZK60 magnesium alloy was conducted using the Gleeble®3500 thermal-mechanical simulation testing system.A new approach to model the high temperature constitutive behavior of the alloy was done using two well-known equations(*** sine and Ludwig equations).For this approach,the deformation conditions were divided into regimes of low and high temperature and strain rate(four regimes).Constitutive model development was conducted in each regime and the material parameters(P)were evaluated as strain,strain rate and temperature-dependent variables;P(ε,ε,T).Using this approach,the flow curves were predicted with high accuracy relative to the experimental ***,detailed information on the evolution of hot deformation activation energy was obtained using the modified hyperbolic sine *** the modified Ludwig equation,details of strain hardening and strain rate sensitivity of the ZK60 material during hot deformation were obtained.