The mathematic model of tension straightening process of magnesium alloy and experimental validation  

作　　者：Yan Jing Zhang Ding-fei Wang Xiao-hong Peng Jian Yang Lin 

机构地区：[1]Chengdu Equipment Manufacturing Branch Company,Baoji Oilfield Machinery Co.,Ltd,Sichuan,Chengdu 610000,China [2]College of Materials Science and Engineering,Chongqing University,Chongqing 400045,China [3]National Engineering Research Center for Magnesium Alloys,Chongqing 400044,China [4]College of Material Science and Engineering,Southwest Petroleum University,Chengdu 610500,China

出　　处：《Journal of Magnesium and Alloys》2013年第1期76-81,共6页镁合金学报（英文）

基　　金：Sponsored by National Great Theoretic Research Project(2013CB632200);National Sci&Tech Support Project(2011BAE22B01-3);International Cooperation Project(2010DFR50010).

摘　　要：The stress-strain curve of bending bar and the stress relax curve of AZ31 was obtained by a tension test using Gleeble-1500.The tension straightening process mainly consisted of the elastic loading-I and unloading stage,the elastic loading-II and unloading stage,and the elastic-plastic loading stage,which were based on the stretch force change during straightening.The circular bar straightening under one-dimensional bending was investigated and assumed to be linear strain-hardening elastic-plastic material.According to the elastic-plastic mechanics theory,the mathematical displacement-force model of a tension straightening process established,on which was based,the predicted displacement of tension straightening for various original deflection was calculated.The tension straightening experiment for AZ31 magnesium was conducted under the guidance of the predicted displacement.The experiment results present good straightness when there is a stress relaxation phenomenon or the temperature of tension straightening is 25℃.

关 键 词：Tension straightening Mathematic model Linear strain-hardening elasticeplastic material Stress relaxation AZ31 magnesium 

分 类 号：TG1[金属学及工艺—金属学]