Journal ArticleDOI
Observations on the Stress Corrosion Cracking of an Al-5%Zn-2.5%Mg Ternary and Various Quaternary Alloys
J. A. S. Green,W. G. Montague +1 more
TLDR
In this paper, the authors test a concept of controlling stress corrosion crack propagation in Al-Zn-Mg alloys through the use of minor alloying additions of elements known to retard hydrogen ion recombination.Abstract:
Studies were undertaken to test a concept of controlling stress corrosion crack propagation in Al-Zn-Mg alloys through the use of minor alloying additions of elements known to retard hydrogen ion recombination. Previous work suggested that the recombination of hydrogen ions governs the rate of anodic dissolution and, in turn, the rate of crack propagation in these alloys. Results indicated that the concept was invalid since the minor alloying additions themselves exerted a more profound influence on the grain boundary microstructure. Specifically, the microstructural features of grain boundary particle size and interparticle spacing were found to correlate with stress corrosion susceptibility. Auger electron spectroscope studies also revealed a correlation between the concentration of Zn and Mg within the precipitate-free zone and the susceptibility to cracking.read more
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Book ChapterDOI
The Role of Metallurgical Variables in Hydrogen-Assisted Environmental Fracture
TL;DR: In this paper, two kinds of environmental fracture, stress corrosion cracking (SCC) and hydrogen embrittlement, and the role in such failures of a number of metallurgical variables are discussed.
Journal ArticleDOI
The role of magnesium segregation in the intergranular stress corrosion cracking of aluminium alloys
TL;DR: In this article, the grain boundary segregation of magnesium is examined with reference to both direct and indirect experimental evidence for magnesium segregation, and evidence to support both equilibrium and non-equilibrium segregation is presented.
Journal ArticleDOI
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Effect of Homogenization and Aging Treatment on Mechanical Properties and Stress-Corrosion Cracking of 7050 Alloys
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Journal ArticleDOI
New interatomic potential for Mg-Al-Zn alloys with specific application to dilute Mg-based alloys
TL;DR: In this paper, a modified embedded atom method (MEAM) zinc potential was proposed for the Mg-Al-Zn system, which relaxes the condition that hcp be the lowest energy structure.