Finite element analysis of pressure on 2024 aluminum alloy created during restricting expansion-deformation heat-treatment  

2024铝合金限制膨胀变形热处理产生高压的有限元分析(英文)

作　　者：赵娜[1] 杨延清[1] 韩明[1] 罗贤[1] 冯广海[1] 张荣军[1] 

机构地区：[1]西北工业大学 凝固技术国家重点实验室,西安710072

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第9期2226-2232,共7页中国有色金属学报（英文版）

基　　金：Project (51071125) supported by the National Natural Science Foundation of China;Projects (SKLSP201107, SKLSP 201124) supported by the Fund of the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University, China

摘　　要：Metals heat-treated under high pressure can exhibit different properties. The heat-induced pressure on 2024 aluminum alloy during restricting expansion-deformation heat-treatment was calculated by using the ABAQUS finite element software, and the effects of the mould material properties, such as coefficient of thermal expansion （CTE）, elastic modulus and yield strength, on the pressure were discussed. The simulated results show that the relatively uniform heat-induced pressure, approximately 503 MPa at 500 ℃, appears on 2024 alloy when 42CrMo steel is as the mould material. The heat-induced pressure increases with decreasing the CTE and the increases of elastic modulus and yield strength of the mould material. The influences of the CTE and elastic modulus on the heat-induced pressure are more notable.采用限制热膨胀变形的热处理方法在2024铝合金上产生热致压力,利用ABAQUS有限元软件模拟计算其热致压力,考察模具材料的热膨胀系数、弹性模量和屈服强度等材料性能对热致压力的影响规律。结果表明:该装置在500 ℃时能够产生比较均匀的热致压力,当模具材料采用42CrMo时,热致压力最大可达503MPa;热致压力随着模具材料热膨胀系数的减小、弹性模量以及屈服强度的增加而增大,模具材料的热膨胀系数和弹性模量对热致压力的影响更明显。

关 键 词：aluminum alloy heat-induced pressure finite element modeling temperature field stress field material properties 

分 类 号：TG146.21[一般工业技术—材料科学与工程]