文献类型：期刊文章

作　　者：陈送义[1,2] 陈康华[2] 董朋轩[2] 叶升平[2] 黄兰萍[2]

机构地区：[1]中南大学轻合金研究院,长沙410083 [2]中南大学粉末冶金国家重点实验室,长沙410083

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

基　　金：Projects(2010CB731701,2012CB619502)supported by the National Basic Research Program of China;Projects(51201186,51327902)supported by the National Natural Science Foundation of China

年　　份：2014

卷　　号：24

期　　号：7

起止页码：2320-2325

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:000340841700047)、SCI-EXPANDED(收录号：WOS:000340841700047)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：The influences of heat treatment on stress corrosion cracking （SCC）, fracture toughness and strength of 7085 aluminum alloy were investigated by slow strain rate testing, Kahn tear testing combined with scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The results show that the fracture toughness of T74 overaging is increased by 22.9% at the expense of 13.6% strength, and retrogression and reaging （RRA） enhances fracture toughness 14.2% without reducing the strength compared with T6 temper. The fracture toughness of dual-retrogression and reaging （DRRA） is equivalent to that of T74 with an increased strength of 14.6%. The SCC resistance increases in the order： T6〈RRA〈DRRA≈T74. The differences of fracture toughness and SCC were explained on the basis of the role of matrix precipitates and grain boundary orecioitates.

关 键 词：7085 aluminum alloy  heat treatment  stress corrosion cracking  fracture toughness  

分 类 号：TG146.21[材料类] TG166.3]