$Relaxation behavior of laser-peening residual stress under tensile loading investigated by X-ray and neutron diffraction$
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Relaxation behavior of laser-peening residual stress under tensile loading investigated by X-ray and neutron diffraction

Compressive residual stresses induced by peening techniques improve the strength properties of steels, such as fatigue and stress corrosion cracking. However, the compressive residual stress might be reduced owing to thermal and mechanical loading in-service. In this study, the behavior of surface a...

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Autores principales:	Koichi AKITA, Kengo HAYASHI, Kazuya TAKEDA, Yuji SANO, Hiroshi SUZUKI, Atsushi MORIAI, Shin-ichi OHYA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2014
Materias:	laser-peening residual stress relaxation tensile loading neutron diffraction x-ray stress measurement Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/e4a8bcc53c0744d58da45076c2fa3fc5
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spelling	oai:doaj.org-article:e4a8bcc53c0744d58da45076c2fa3fc52021-11-26T06:09:52ZRelaxation behavior of laser-peening residual stress under tensile loading investigated by X-ray and neutron diffraction2187-974510.1299/mej.2014smm0029https://doaj.org/article/e4a8bcc53c0744d58da45076c2fa3fc52014-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/1/4/1_2014smm0029/_pdf/-char/enhttps://doaj.org/toc/2187-9745Compressive residual stresses induced by peening techniques improve the strength properties of steels, such as fatigue and stress corrosion cracking. However, the compressive residual stress might be reduced owing to thermal and mechanical loading in-service. In this study, the behavior of surface and internal residual stresses of a laser-peened ferritic steel under quasi-static tensile loading was investigated by X-ray and neutron diffraction. The complementary use of these diffraction techniques provided decisive experimental evidence for elucidating the relaxation process. As the applied tensile stress increases, the inside of the sample yields before the surface yielding at the critical applied stress (the applied stress for the onset of relaxation of the surface residual stress). The internal yielding causes the redistribution of residual stress, resulting in the relaxation of the surface compressive residual stress. Therefore, the relaxation of the surface compressive residual stress under tensile loading starts before the surface yielding. The critical applied stress of peened samples subjected to a tensile loading can be estimated from the von Mises yield criterion with the maximum tensile residual stress inside the sample. The FWHM of X-ray diffraction profile of the sample surface was increased by laser-peening, and it was further increased by further plastic deformation after peening.Koichi AKITAKengo HAYASHIKazuya TAKEDAYuji SANOHiroshi SUZUKIAtsushi MORIAIShin-ichi OHYAThe Japan Society of Mechanical Engineersarticlelaser-peeningresidual stress relaxationtensile loadingneutron diffractionx-ray stress measurementMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 1, Iss 4, Pp SMM0029-SMM0029 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	laser-peening residual stress relaxation tensile loading neutron diffraction x-ray stress measurement Mechanical engineering and machinery TJ1-1570
spellingShingle	laser-peening residual stress relaxation tensile loading neutron diffraction x-ray stress measurement Mechanical engineering and machinery TJ1-1570 Koichi AKITA Kengo HAYASHI Kazuya TAKEDA Yuji SANO Hiroshi SUZUKI Atsushi MORIAI Shin-ichi OHYA Relaxation behavior of laser-peening residual stress under tensile loading investigated by X-ray and neutron diffraction
description	Compressive residual stresses induced by peening techniques improve the strength properties of steels, such as fatigue and stress corrosion cracking. However, the compressive residual stress might be reduced owing to thermal and mechanical loading in-service. In this study, the behavior of surface and internal residual stresses of a laser-peened ferritic steel under quasi-static tensile loading was investigated by X-ray and neutron diffraction. The complementary use of these diffraction techniques provided decisive experimental evidence for elucidating the relaxation process. As the applied tensile stress increases, the inside of the sample yields before the surface yielding at the critical applied stress (the applied stress for the onset of relaxation of the surface residual stress). The internal yielding causes the redistribution of residual stress, resulting in the relaxation of the surface compressive residual stress. Therefore, the relaxation of the surface compressive residual stress under tensile loading starts before the surface yielding. The critical applied stress of peened samples subjected to a tensile loading can be estimated from the von Mises yield criterion with the maximum tensile residual stress inside the sample. The FWHM of X-ray diffraction profile of the sample surface was increased by laser-peening, and it was further increased by further plastic deformation after peening.
format	article
author	Koichi AKITA Kengo HAYASHI Kazuya TAKEDA Yuji SANO Hiroshi SUZUKI Atsushi MORIAI Shin-ichi OHYA
author_facet	Koichi AKITA Kengo HAYASHI Kazuya TAKEDA Yuji SANO Hiroshi SUZUKI Atsushi MORIAI Shin-ichi OHYA
author_sort	Koichi AKITA
title	Relaxation behavior of laser-peening residual stress under tensile loading investigated by X-ray and neutron diffraction
title_short	Relaxation behavior of laser-peening residual stress under tensile loading investigated by X-ray and neutron diffraction
title_full	Relaxation behavior of laser-peening residual stress under tensile loading investigated by X-ray and neutron diffraction
title_fullStr	Relaxation behavior of laser-peening residual stress under tensile loading investigated by X-ray and neutron diffraction
title_full_unstemmed	Relaxation behavior of laser-peening residual stress under tensile loading investigated by X-ray and neutron diffraction
title_sort	relaxation behavior of laser-peening residual stress under tensile loading investigated by x-ray and neutron diffraction
publisher	The Japan Society of Mechanical Engineers
publishDate	2014
url	https://doaj.org/article/e4a8bcc53c0744d58da45076c2fa3fc5
work_keys_str_mv	AT koichiakita relaxationbehavioroflaserpeeningresidualstressundertensileloadinginvestigatedbyxrayandneutrondiffraction AT kengohayashi relaxationbehavioroflaserpeeningresidualstressundertensileloadinginvestigatedbyxrayandneutrondiffraction AT kazuyatakeda relaxationbehavioroflaserpeeningresidualstressundertensileloadinginvestigatedbyxrayandneutrondiffraction AT yujisano relaxationbehavioroflaserpeeningresidualstressundertensileloadinginvestigatedbyxrayandneutrondiffraction AT hiroshisuzuki relaxationbehavioroflaserpeeningresidualstressundertensileloadinginvestigatedbyxrayandneutrondiffraction AT atsushimoriai relaxationbehavioroflaserpeeningresidualstressundertensileloadinginvestigatedbyxrayandneutrondiffraction AT shinichiohya relaxationbehavioroflaserpeeningresidualstressundertensileloadinginvestigatedbyxrayandneutrondiffraction
_version_	1718409814934028288

Relaxation behavior of laser-peening residual stress under tensile loading investigated by X-ray and neutron diffraction

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