Grain refinement of Mg-Al alloys by optimization of process parameters based on three-dimensional finite element modeling of roll casting

作     者：胡红军 Hong-jun HU

作者机构：重庆理工大学材料科学与工程学院重庆400050 重庆理工大学汽车零部件制造及检测技术教育部重点实验室重庆400050 

基　　金：Project(CSTC 2010BB4301) supported by Natural Science Foundation Project of Chongqing,China Project supported by the Open Fund for Key Laboratory of Manufacture and Test Techniques for Automobile Parts of Ministry of Education Chongqing University of Technology,2003,China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2013年第23卷第3期

页      码：773-780页

摘      要：To study the influence of roll casting process parameters on temperature and thermal-stress fields for the AZ31 magnesium alloy sheets,three-dimensional geometric and 3D finite element models for roll casting were established based on the symmetry of roll casting by ANSYS *** method and smart-sizing algorithm were used to divide finite element mesh in ANSYS software.A series of researches on the temperature and stress distributions during solidification process with different process parameters were done by 3D finite element *** temperatures of both the liquid-solid two-phase zone and liquid phase zone were elevated with increasing pouring *** the heat transfer coefficient increasing,the two-phase region for liquid-solid becomes *** the pouring temperature increasing and the increase of casting speed,the length of two-phase zone *** optimized of process parameters（casting speed 2 m/min,pouring temperature 640 ℃ and heat transfer coefficient 15 kW/（m2·℃） with the water pouring at roller exit was used to produce magnesium alloy AZ31 sheet,and equiaxed grains with the average grain size of 50 μm were achieved after roll *** simulation results give better understanding of the temperature variation in phase transformation zone and the formation mechanism of hot cracks in plates during roll casting and help to design the optimized process parameters of roll casting for Mg alloy.

主 题 词：magnesium alloy roll casting process parameter 3D finite element method thermal-stress 

学科分类：080503[080503] 08[工学] 0805[工学-能源动力学] 0802[工学-机械学] 080201[080201] 

核心收录：

D　O　I：10.1016/S1003-6326(13)62528-5

馆 藏 号：203753938...