中南大学学报（自然科学版）2012，Vol.43Issue(7)：2520-2527,8.
RRA处理对1973铝合金晶间腐蚀与剥蚀的影响
Influence of retrogression and re-aging treatment on intergranular and exfoliation corrosion of 1973 aluminum alloy
摘要
Abstract
The influence of retrogression and re-aging treatment (RRA) process on mechanical properties and the intergranular and exfoliation corrosion of 1973 aluminum alloy were investigated using hardness measurement, constant tensile properties test, polarization curve measurement, intergranular and exfoliation corrosion tests, optical microscopy (OM) and transmission electron microscopy observation (TEM). The results show that the intergranular corrosion trend is the same as that of exfoliation corrosion after different aging treatments, and the RRA process order of descending corrosion resistance is that: 200 ℃, 60 min; 180 ℃, 60 min; 180 ℃, 40 cnin; 180 ℃, 20 min; T6. The strength and the resistance of intergranular and exfoliation corrosion of 1973 aluminum alloy can be enhanced with the retrogression and re-aging treatment at 180 ℃. As the retrogression and re-aging treatment at 200 ℃ for 1 h the corrosion resistant of 1973 aluminum alloy increases, however its strength decreases greatly. Retrogression and re-aging at 180 ℃ for 1 h is a suitable processing for 1973 aluminum alloy to have good combination properties.关键词
晶间腐蚀/剥落腐蚀/回归再时效Key words
intergranular corrosion/exfoliation corrosion/retrogression and re-aging treatment分类
矿业与冶金引用本文复制引用
龚静,汪明朴,张茜,盛晓菲,杨文超,李周..RRA处理对1973铝合金晶间腐蚀与剥蚀的影响[J].中南大学学报（自然科学版）,2012,43(7):2520-2527,8.基金项目
国家高技术研究发展计划(“863”计划)项目(2006AA032517) （“863”计划）
湖南省博士生科研创新项目(CX2010B044) （CX2010B044）
