Effects of Surface Softening on the Mechanical Properties of an AISI 316L Stainless Steel under Cyclic Loading

The effects of surface softening on fatigue behavior of AISI 316L stainless steel were investigated. Using cold-rolling and electromagnetic induction heating treatment, a gradient structure was fabricated on AISI 316L stainless steel within which the grain size decreased exponentially from micromete...

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Autores principales:	Tiehui Fang, Feng Cai
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	surface softening fatigue crack initiation AISI 316L stainless steel cyclic deformation Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/87bf41d37d9d4dc1ad32e99022f44f45
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id	oai:doaj.org-article:87bf41d37d9d4dc1ad32e99022f44f45
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spelling	oai:doaj.org-article:87bf41d37d9d4dc1ad32e99022f44f452021-11-25T18:21:57ZEffects of Surface Softening on the Mechanical Properties of an AISI 316L Stainless Steel under Cyclic Loading10.3390/met111117882075-4701https://doaj.org/article/87bf41d37d9d4dc1ad32e99022f44f452021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1788https://doaj.org/toc/2075-4701The effects of surface softening on fatigue behavior of AISI 316L stainless steel were investigated. Using cold-rolling and electromagnetic induction heating treatment, a gradient structure was fabricated on AISI 316L stainless steel within which the grain size decreased exponentially from micrometers to nanometers to mimic the surface softening. Stress-controlled fatigue tests were applied to both the gradient and homogeneous structures. Compared with the homogeneous sample, surface softening had no evident effect on fatigue behavior when the stress amplitude was greater than 400 MPa, but significantly deteriorated the fatigue behavior at stress amplitude ≤400 MPa. At high-stress amplitude, fatigue behavior is dominated by crack propagation. When the stress amplitude is lowered, strength reduction and stress concentration caused by surface softening accelerate crack initiation and propagation, resulting in an inferior fatigue behavior.Tiehui FangFeng CaiMDPI AGarticlesurface softeningfatiguecrack initiationAISI 316L stainless steelcyclic deformationMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1788, p 1788 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	surface softening fatigue crack initiation AISI 316L stainless steel cyclic deformation Mining engineering. Metallurgy TN1-997
spellingShingle	surface softening fatigue crack initiation AISI 316L stainless steel cyclic deformation Mining engineering. Metallurgy TN1-997 Tiehui Fang Feng Cai Effects of Surface Softening on the Mechanical Properties of an AISI 316L Stainless Steel under Cyclic Loading
description	The effects of surface softening on fatigue behavior of AISI 316L stainless steel were investigated. Using cold-rolling and electromagnetic induction heating treatment, a gradient structure was fabricated on AISI 316L stainless steel within which the grain size decreased exponentially from micrometers to nanometers to mimic the surface softening. Stress-controlled fatigue tests were applied to both the gradient and homogeneous structures. Compared with the homogeneous sample, surface softening had no evident effect on fatigue behavior when the stress amplitude was greater than 400 MPa, but significantly deteriorated the fatigue behavior at stress amplitude ≤400 MPa. At high-stress amplitude, fatigue behavior is dominated by crack propagation. When the stress amplitude is lowered, strength reduction and stress concentration caused by surface softening accelerate crack initiation and propagation, resulting in an inferior fatigue behavior.
format	article
author	Tiehui Fang Feng Cai
author_facet	Tiehui Fang Feng Cai
author_sort	Tiehui Fang
title	Effects of Surface Softening on the Mechanical Properties of an AISI 316L Stainless Steel under Cyclic Loading
title_short	Effects of Surface Softening on the Mechanical Properties of an AISI 316L Stainless Steel under Cyclic Loading
title_full	Effects of Surface Softening on the Mechanical Properties of an AISI 316L Stainless Steel under Cyclic Loading
title_fullStr	Effects of Surface Softening on the Mechanical Properties of an AISI 316L Stainless Steel under Cyclic Loading
title_full_unstemmed	Effects of Surface Softening on the Mechanical Properties of an AISI 316L Stainless Steel under Cyclic Loading
title_sort	effects of surface softening on the mechanical properties of an aisi 316l stainless steel under cyclic loading
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/87bf41d37d9d4dc1ad32e99022f44f45
work_keys_str_mv	AT tiehuifang effectsofsurfacesofteningonthemechanicalpropertiesofanaisi316lstainlesssteelundercyclicloading AT fengcai effectsofsurfacesofteningonthemechanicalpropertiesofanaisi316lstainlesssteelundercyclicloading
_version_	1718411269545918464

Effects of Surface Softening on the Mechanical Properties of an AISI 316L Stainless Steel under Cyclic Loading

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