Cleavage-dissolution assisted stress corrosion cracking under elastic loads

Abstract As a significant cause of disastrous accidents, stress corrosion cracking (SCC) under elastic loads was investigated in type 316 L single-crystal stainless steel immersed in a boiling 45 wt% MgCl2 solution. Three-dimensional microcrack morphologies, characterized using synchrotron-based X-r...

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Autores principales:	Longkui Zhu, Yao Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/0cbe9968d5f0448898bd9fd32f2985c5
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spelling	oai:doaj.org-article:0cbe9968d5f0448898bd9fd32f2985c52021-12-02T16:51:31ZCleavage-dissolution assisted stress corrosion cracking under elastic loads10.1038/s41529-021-00172-72397-2106https://doaj.org/article/0cbe9968d5f0448898bd9fd32f2985c52021-05-01T00:00:00Zhttps://doi.org/10.1038/s41529-021-00172-7https://doaj.org/toc/2397-2106Abstract As a significant cause of disastrous accidents, stress corrosion cracking (SCC) under elastic loads was investigated in type 316 L single-crystal stainless steel immersed in a boiling 45 wt% MgCl2 solution. Three-dimensional microcrack morphologies, characterized using synchrotron-based X-ray computed tomography, indicate that the SCC advanced along the cleavage planes (1 0 0) with the lowest free surface energy. The first-principles simulations show that synergistic adsorption of H and Cl atoms in the octahedral interstices minimized the surface energy of the cleavage planes (0 0 1) owing to a 73% reduction. Afterwards, the cleavage-dissolution mechanism is put forward, proposing that the SCC essentially originates from preferential brittle rupture of the corrosive environment particle adsorbed low-surface-energy cleavage planes in the elastic stress concentration zones, and anodic dissolution along the crack fronts. Besides, the corrosive environment particles primarily consist of the hydrogen atoms and the electronegative ions such as the chlorine ions.Longkui ZhuYao LiNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ENnpj Materials Degradation, Vol 5, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Longkui Zhu Yao Li Cleavage-dissolution assisted stress corrosion cracking under elastic loads
description	Abstract As a significant cause of disastrous accidents, stress corrosion cracking (SCC) under elastic loads was investigated in type 316 L single-crystal stainless steel immersed in a boiling 45 wt% MgCl2 solution. Three-dimensional microcrack morphologies, characterized using synchrotron-based X-ray computed tomography, indicate that the SCC advanced along the cleavage planes (1 0 0) with the lowest free surface energy. The first-principles simulations show that synergistic adsorption of H and Cl atoms in the octahedral interstices minimized the surface energy of the cleavage planes (0 0 1) owing to a 73% reduction. Afterwards, the cleavage-dissolution mechanism is put forward, proposing that the SCC essentially originates from preferential brittle rupture of the corrosive environment particle adsorbed low-surface-energy cleavage planes in the elastic stress concentration zones, and anodic dissolution along the crack fronts. Besides, the corrosive environment particles primarily consist of the hydrogen atoms and the electronegative ions such as the chlorine ions.
format	article
author	Longkui Zhu Yao Li
author_facet	Longkui Zhu Yao Li
author_sort	Longkui Zhu
title	Cleavage-dissolution assisted stress corrosion cracking under elastic loads
title_short	Cleavage-dissolution assisted stress corrosion cracking under elastic loads
title_full	Cleavage-dissolution assisted stress corrosion cracking under elastic loads
title_fullStr	Cleavage-dissolution assisted stress corrosion cracking under elastic loads
title_full_unstemmed	Cleavage-dissolution assisted stress corrosion cracking under elastic loads
title_sort	cleavage-dissolution assisted stress corrosion cracking under elastic loads
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0cbe9968d5f0448898bd9fd32f2985c5
work_keys_str_mv	AT longkuizhu cleavagedissolutionassistedstresscorrosioncrackingunderelasticloads AT yaoli cleavagedissolutionassistedstresscorrosioncrackingunderelasticloads
_version_	1718382901400174592

Cleavage-dissolution assisted stress corrosion cracking under elastic loads

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