Studies of hydrogen embrittlement and stress-corrosion cracking in an aluminum-zinc-magnesium alloy. [5. 6 Zn - 2. 6 Mg]
Year: 1980
Type: report
Abstract: Tensile tests have been carried out on a high-purity A1-5.6 Zn-2.6 Mg alloy hydrogenated by exposure to moist air. Results indicate that internal hydrogen embrittlement occurs by the formation and rupture of a stress-induced hydride at the grain boundaries. The hydride, identified by electron diffraction as A1H/sub 3/, is shown to be unstable in laboratory air, reverting to aluminum. The hydride phase was not detected in specimens failed by SCC, despite evidence that hydrogen is transported ahead of advancing stress-corrosion cracks, and this leads to the possibility that a basically different mechanism may be responsible for SCC in this alloy.
DOI: 10.2172/6768362
Authors: S.W. Ciaraldi, J.L. Nelson, R.A. Yeske, E.N. Pugh
Language: English
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4229664810