航空材料学报2012，Vol.32Issue(5)：43-48,6.DOI:10.3969/j.issn.1005-5053.2012.5.007
强化固溶对含Sr 7085型铝合金晶间腐蚀和剥落腐蚀性能的影响
Effect of Enhanced-Solid-Solution on Intergranular Corrosion and Exfoliation Corrosion Properties of 7085 Type Aluminum Alloy Containing Strontium
摘要
Abstract
The effect of enhanced-solid-solution treatment on the hardness, electrical conductivity, intergranular corrosion and exfoliation corrosion properties of strontium (Sr) microalloyed 7085 type aluminum alloy (Al-7. 95Zn-l. 80Mg-l. 59Cu-0. 15Zr-0. 024Sr) was investigated by using microhardness testing, electrical conductivity testing, intergranular/exfoliation corrosion experiments, and optical and scanning electron microscopy observation. The results show that compared with the conventional solid-solution treatment (470 (C/ 2 h) , the enhanced-solid-solution treatment (470 ℃/2 h +480 ℃/2h +490 ℃/2 h) advances the dissolution of coarse second phases. After being treated by the conventional T6 (121 ℃/2 h) ageing, relative to the conventional solid-solution treated alloy, the enhanced-solid-solution alloy exhibites a slightly lower hardness, slightly higher electrical conductivity, and a considerable improvement in intergranular corrosion and exfoliation corrosion resistances. The present experimental results demonstrate that the enhanced-solid-solution treatment is an effective tool to improve the anti-corrosion, especially the anti-exfoliation corrosion properties of Sr microalloyed 7085 type aluminum alloy.关键词
7085型铝合金/强化固溶处理/锶/晶间腐蚀/剥落腐蚀Key words
7085 type aluminum alloy/ enhanced solid-solution treatment/ strontium (Sr) / intergranular corrosion/ exfoliation corrosion分类
矿业与冶金引用本文复制引用
罗勇,许晓静,张允康,宋涛,王宏宇,张振强,张福豹,吴桂潮,吴瑶..强化固溶对含Sr 7085型铝合金晶间腐蚀和剥落腐蚀性能的影响[J].航空材料学报,2012,32(5):43-48,6.基金项目
江苏省工业科技支撑计划项目(BE2008118) （BE2008118）
江苏大学优秀青年学术骨干培育专项基金(1211110001)资助 （1211110001）
江苏省高校研究生科研创新计划项目(CXLX110563) （CXLX110563）
