工程科学学报2017，Vol.39Issue(4)：542-549,8.DOI:10.13374/j.issn2095-9389.2017.04.009
二氧化硫复合盐雾环境下2024-T351铝合金应力腐蚀开裂
Stress corrosion cracking of 2024-T351 aluminum alloy in SO2 mixed salt spray environment
满成 1张欢 1董超芳 1余强 1肖葵 1李晓刚1
作者信息
- 1. 北京科技大学腐蚀与防护中心,北京 100083
- 折叠
摘要
Abstract
The stress corrosion cracking of 2024-T351 aluminum alloy was investigated by finite element simulation analysis,scanning electron microscopy/energy dispersive spectrometry,and X-ray photoelectron spectroscopy through SO2 mixed salt spray test.Results indicate that stress corrosion cracking initiates preferentially at the region of stress concentration of the C-ring top for 2024-T351 aluminum alloy.The morphologies of loose corrosion products change from fine rod-like and flocculent to plate-like.Secondary cracks form in the internal corrosion crack after 6h,when the corrosion time increases to 480h,and the fractures and cracks in the surface of the C-ring side penetrate the whole sample.The C-ring sample completely breaks after 720h.The opening crack propagation is a mixed mode of transgranular and intergranular,while the main cracks extend along the normal of the C-ring and the secondary cracks extend mainly along the grain boundaries.关键词
铝合金/大气腐蚀/二氧化硫/应力腐蚀开裂Key words
aluminum alloy/atmospheric corrosion/sulfur dioxide/stress corrosion cracking分类
矿业与冶金引用本文复制引用
满成,张欢,董超芳,余强,肖葵,李晓刚..二氧化硫复合盐雾环境下2024-T351铝合金应力腐蚀开裂[J].工程科学学报,2017,39(4):542-549,8.
