Observation of stress corrosion cracking using real-time in situ high-speed atomic force microscopy and correlative techniques

Abstract Contact-mode high-speed atomic force microscopy (HS-AFM) has been utilised to measure in situ stress corrosion cracking (SCC) with nanometre resolution on AISI Type 304 stainless steel in an aggressive salt solution. SCC is an important failure mode in many metal systems but has a complicat...

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Autores principales:	S. Moore, R. Burrows, D. Kumar, M. B. Kloucek, A. D. Warren, P. E. J. Flewitt, L. Picco, O. D. Payton, T. L. Martin
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/b7ce14f459c64c0e93f2ebeb97050f0d
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spelling	oai:doaj.org-article:b7ce14f459c64c0e93f2ebeb97050f0d2021-12-02T13:56:55ZObservation of stress corrosion cracking using real-time in situ high-speed atomic force microscopy and correlative techniques10.1038/s41529-020-00149-y2397-2106https://doaj.org/article/b7ce14f459c64c0e93f2ebeb97050f0d2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41529-020-00149-yhttps://doaj.org/toc/2397-2106Abstract Contact-mode high-speed atomic force microscopy (HS-AFM) has been utilised to measure in situ stress corrosion cracking (SCC) with nanometre resolution on AISI Type 304 stainless steel in an aggressive salt solution. SCC is an important failure mode in many metal systems but has a complicated mechanism that makes failure difficult to predict. Prior to the in situ experiments, the contributions of microstructure, environment and stress to SCC were independently studied using HS-AFM. During SCC measurements, uplift of grain boundaries before cracking was observed, indicating a subsurface contribution to the cracking mechanism. Focussed ion beam milling revealed a network of intergranular cracks below the surface lined with a thin oxide, indicating that the SCC process is dominated by local stress at oxide-weakened boundaries. Subsequent analysis by atom probe tomography of a crack tip showed a layered oxide composition at the surface of the crack walls. Oxide formation is posited to be mechanistically linked to grain boundary uplift. This study shows how in situ HS-AFM observations in combination with complementary techniques can give important insights into the mechanisms of SCC.S. MooreR. BurrowsD. KumarM. B. KloucekA. D. WarrenP. E. J. FlewittL. PiccoO. D. PaytonT. L. MartinNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ENnpj Materials Degradation, Vol 5, Iss 1, Pp 1-10 (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 S. Moore R. Burrows D. Kumar M. B. Kloucek A. D. Warren P. E. J. Flewitt L. Picco O. D. Payton T. L. Martin Observation of stress corrosion cracking using real-time in situ high-speed atomic force microscopy and correlative techniques
description	Abstract Contact-mode high-speed atomic force microscopy (HS-AFM) has been utilised to measure in situ stress corrosion cracking (SCC) with nanometre resolution on AISI Type 304 stainless steel in an aggressive salt solution. SCC is an important failure mode in many metal systems but has a complicated mechanism that makes failure difficult to predict. Prior to the in situ experiments, the contributions of microstructure, environment and stress to SCC were independently studied using HS-AFM. During SCC measurements, uplift of grain boundaries before cracking was observed, indicating a subsurface contribution to the cracking mechanism. Focussed ion beam milling revealed a network of intergranular cracks below the surface lined with a thin oxide, indicating that the SCC process is dominated by local stress at oxide-weakened boundaries. Subsequent analysis by atom probe tomography of a crack tip showed a layered oxide composition at the surface of the crack walls. Oxide formation is posited to be mechanistically linked to grain boundary uplift. This study shows how in situ HS-AFM observations in combination with complementary techniques can give important insights into the mechanisms of SCC.
format	article
author	S. Moore R. Burrows D. Kumar M. B. Kloucek A. D. Warren P. E. J. Flewitt L. Picco O. D. Payton T. L. Martin
author_facet	S. Moore R. Burrows D. Kumar M. B. Kloucek A. D. Warren P. E. J. Flewitt L. Picco O. D. Payton T. L. Martin
author_sort	S. Moore
title	Observation of stress corrosion cracking using real-time in situ high-speed atomic force microscopy and correlative techniques
title_short	Observation of stress corrosion cracking using real-time in situ high-speed atomic force microscopy and correlative techniques
title_full	Observation of stress corrosion cracking using real-time in situ high-speed atomic force microscopy and correlative techniques
title_fullStr	Observation of stress corrosion cracking using real-time in situ high-speed atomic force microscopy and correlative techniques
title_full_unstemmed	Observation of stress corrosion cracking using real-time in situ high-speed atomic force microscopy and correlative techniques
title_sort	observation of stress corrosion cracking using real-time in situ high-speed atomic force microscopy and correlative techniques
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b7ce14f459c64c0e93f2ebeb97050f0d
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Observation of stress corrosion cracking using real-time in situ high-speed atomic force microscopy and correlative techniques

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