Mathematical modeling of thermo-mechanical behavior of strip during twin roll casting of an AZ31 magnesium alloy

作     者：Amir Hadadzadeh Mary A.Wells 

作者机构：Department of Mechanical and Mechatronics EngineeringUniversity of Waterloo200 University Avenue WestWaterlooON N2L 3G1Canada 

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

年 卷 期：2013年第1卷第2期

页      面：101-114页

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：The authors of this work would like to appreciate the NSERC(Natural Sciences and Engineering Research Council of Canada)Magnesium Strategic Research Network(MagNET)for the financial support of this work and the Natural Resources Canada Government Materials Laboratory CanmetMATERIALS located in Hamilton Ontario for providing the opportunity to perform the experimental parts of the work.The assistance of Dr.M.Kozdras Dr.A.Javaid Dr.E.Essadiqi and Mr.G.Birsan and P.Newcombe(from CanmetMATERIALS)in processing the experimental data is gratefully acknowledged 

主　　题：Twin roll casting process AZ31 magnesium alloy Thermal-fluid-stress model Set-back distance Roll separating force 

摘      要：The effect of set-back distance on the thermo-mechanical behavior of the strip during twin roll casting(TRC)of an AZ31 magnesium alloy was modeled using finite element method(FEM).Model validation was done by comparing the predicted and measured exit strip surface temperature as well as the secondary dendrite arm spacing(SDAS)through the thickness of the sheet to those measured during *** results showed as the set-back distance increases,the strip exit temperature decreases and the solidification front moves toward the entry of the roll *** cast strip also experiences more plastic deformation and consequently,the normal stress on the strip surface and effective strain at the strip center-line ***,higher separating forces were predicted for longer set-back *** predictions showed that changing the set-back distance by varying the final thickness has a more significant effect on the temperature and stress-strain fields than altering the nozzle opening height.