Work

Study on hydrogen-assisted stress corrosion cracking behavior of 7050 aluminum alloy

Year: 2025

Type: article

Abstract: The effect of hydrogen on the stress corrosion cracking(SCC) susceptibility of 7050 aluminum alloy in 3.5% wt. NaCl solution was investigated by slow strain rate tensile (SSRT) tests with and without hydrogen pre-charging. The experimental results indicated that the stress corrosion cracking (SCC) mechanism of 7050 aluminum alloy is primarily dominated by anodic dissolution, while hydrogen-assisted anodic dissolution during the crack propagation process. The strength and ductility of the aluminum alloy was significantly influenced by hydrogen content. This phenomenon is attributed to hydrogen-induced Mg segregation at grain boundaries, which subsequently facilitates localized anodic dissolution in these regions.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2025.02.253

Authors: Qiang Zhang, Shanshan Shao, Yuhui Huang, Shan-Tung Tu

Institutions: East China University of Science and Technology, China Special Equipment Inspection and Research Institute

Language: English

Topic: Hydrogen embrittlement and corrosion behaviors in metals

Subfield: Metals and Alloys

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,640

Funder: National Natural Science Foundation of China