文献类型：期刊文章

作　　者：王明亮[1] 金培鹏[1] 王金辉[1] 韩丽[1]

机构地区：[1]青海大学机械工程学院,青海省新型轻合金重点实验室,西宁810016

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Project(2011CB612200)supported by the National Basic Research Program of China

年　　份：2014

卷　　号：24

期　　号：9

起止页码：2796-2804

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2013_2014、EBSCO、EI、IC、INSPEC、JST、SCI(收录号：WOS:000344001700008)、SCI-EXPANDED(收录号：WOS:000344001700008)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：The compressive deformation behavior of as-quenched 7005 aluminum alloy was investigated at the temperature ranging from 250 °C to 450 °C and strain rate ranging from 0.0005 s-1 to 0.5 s^-1 on Gleeble-1500 thermal-simulation machine. Experimental results show that the flow stress of as-quenched 7005 alloy is affected by both deformation temperature and strain rate, which can be represented by a Zener-Hollomon parameter in an exponent-type equation. By comparing the calculated flow stress and the measured flow stress, the results show that the calculated flow stress agrees well with the experimental result. Based on a dynamic material model, the processing maps were constructed for the strains of 0.1, 0.3 and 0.5. The maps and microstructural examination revealed that the optimum hot working domain is 270-340 °C, 0.05-0.5 s^-1 with the reasonable dynamic recrystallization. The instability domain exhibits adiabatic shear bands and flow localization, which should be avoided during hot working in order to obtain satisfactory properties.

关 键 词：7005 alloy  hot compression deformation  constitutive equation  processing map  

分 类 号：TG146.21[材料类] TG156.3]