Effects of laser shock peening on \SCC\ behavior of Alloy 600 in tetrathionate solution
By Abhishek Telang and Amrinder S. Gill and Sebastien Teysseyre and Seetha R. Mannava and Dong Qian and Vijay K. Vasudevan
Published in Corrosion Science
NULL
2015
Abstract
In this study, the effects of laser shock peening (LSP) on stress corrosion cracking (SCC) behavior of nickel based Alloy 600 in tetrathionate solution were investigated. The \LSP\ induced compressive residual stresses and changes in the near surface microstructure, hardness were characterized. The effects of \LSP\ on \SCC\ susceptibility of Alloy 600 in tetrathionate solution were evaluated by slow strain rate tests and constant load tests. The results indicate a significantly longer time to failure and decreased susceptibility to SCC. These improvements were attributed to \LSP\ induced compressive residual stresses, increased yield strength and hardening caused by near-surface microstructural changes.
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