Fatigue life estimation of SAC solder based on inelastic strain analysis using stepped ramp wave loading

The fatigue life of solder alloys for the slow-fast cyclic loading condition is much shorter than that for the fast-slow cyclic loading condition, despite the two loading conditions having almost the same inelastic strain amplitudes. This means that the inelastic strain amplitude is not the best par...

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Autores principales:	Ken-ichi OHGUCHI, Katsuhiko SASAKI, Yuki YUZE, Kohei FUKUCHI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2019
Materias:	sac solder low-cycle fatigue strain rate dependency elastic-plastic-creep model fatigue failure surface life estimation stepped ramp wave loading Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/1c36fcb075dd406195517f8baec13949
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spelling	oai:doaj.org-article:1c36fcb075dd406195517f8baec139492021-11-29T05:47:04ZFatigue life estimation of SAC solder based on inelastic strain analysis using stepped ramp wave loading2187-974510.1299/mej.19-00137https://doaj.org/article/1c36fcb075dd406195517f8baec139492019-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/6/5/6_19-00137/_pdf/-char/enhttps://doaj.org/toc/2187-9745The fatigue life of solder alloys for the slow-fast cyclic loading condition is much shorter than that for the fast-slow cyclic loading condition, despite the two loading conditions having almost the same inelastic strain amplitudes. This means that the inelastic strain amplitude is not the best parameter used for estimating the fatigue life which shows the strain rate dependency. Then, the authors have previously proposed a fatigue life estimation method for Sn-3.0Ag-0.5Cu (SAC) solder using the creep strain amplitude obtained from the inelastic strain analysis using the stepped ramp wave (SW) loading. In this study, the fatigue tests for SAC solder under 16 loading conditions at RT and the SEM observations for the fatigue failure surfaces were conducted to give experimental supports to both the strain analysis method and the life estimation method. The inelastic strain analyses for all the tests showed that the analysis results were well correlated with the aspects of the fracture surfaces, and that the creep strain amplitudes obtained from the inelastic strain analysis were highly correlated with the strain-rate-dependent fatigue lives of SAC solder at RT. Also it was found that the relational expression between the creep strain amplitude and the fatigue life formulated at RT could be used for estimating the fatigue lives at 398 K.Ken-ichi OHGUCHIKatsuhiko SASAKIYuki YUZEKohei FUKUCHIThe Japan Society of Mechanical Engineersarticlesac solderlow-cycle fatiguestrain rate dependencyelastic-plastic-creep modelfatigue failure surfacelife estimationstepped ramp wave loadingMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 6, Iss 5, Pp 19-00137-19-00137 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	sac solder low-cycle fatigue strain rate dependency elastic-plastic-creep model fatigue failure surface life estimation stepped ramp wave loading Mechanical engineering and machinery TJ1-1570
spellingShingle	sac solder low-cycle fatigue strain rate dependency elastic-plastic-creep model fatigue failure surface life estimation stepped ramp wave loading Mechanical engineering and machinery TJ1-1570 Ken-ichi OHGUCHI Katsuhiko SASAKI Yuki YUZE Kohei FUKUCHI Fatigue life estimation of SAC solder based on inelastic strain analysis using stepped ramp wave loading
description	The fatigue life of solder alloys for the slow-fast cyclic loading condition is much shorter than that for the fast-slow cyclic loading condition, despite the two loading conditions having almost the same inelastic strain amplitudes. This means that the inelastic strain amplitude is not the best parameter used for estimating the fatigue life which shows the strain rate dependency. Then, the authors have previously proposed a fatigue life estimation method for Sn-3.0Ag-0.5Cu (SAC) solder using the creep strain amplitude obtained from the inelastic strain analysis using the stepped ramp wave (SW) loading. In this study, the fatigue tests for SAC solder under 16 loading conditions at RT and the SEM observations for the fatigue failure surfaces were conducted to give experimental supports to both the strain analysis method and the life estimation method. The inelastic strain analyses for all the tests showed that the analysis results were well correlated with the aspects of the fracture surfaces, and that the creep strain amplitudes obtained from the inelastic strain analysis were highly correlated with the strain-rate-dependent fatigue lives of SAC solder at RT. Also it was found that the relational expression between the creep strain amplitude and the fatigue life formulated at RT could be used for estimating the fatigue lives at 398 K.
format	article
author	Ken-ichi OHGUCHI Katsuhiko SASAKI Yuki YUZE Kohei FUKUCHI
author_facet	Ken-ichi OHGUCHI Katsuhiko SASAKI Yuki YUZE Kohei FUKUCHI
author_sort	Ken-ichi OHGUCHI
title	Fatigue life estimation of SAC solder based on inelastic strain analysis using stepped ramp wave loading
title_short	Fatigue life estimation of SAC solder based on inelastic strain analysis using stepped ramp wave loading
title_full	Fatigue life estimation of SAC solder based on inelastic strain analysis using stepped ramp wave loading
title_fullStr	Fatigue life estimation of SAC solder based on inelastic strain analysis using stepped ramp wave loading
title_full_unstemmed	Fatigue life estimation of SAC solder based on inelastic strain analysis using stepped ramp wave loading
title_sort	fatigue life estimation of sac solder based on inelastic strain analysis using stepped ramp wave loading
publisher	The Japan Society of Mechanical Engineers
publishDate	2019
url	https://doaj.org/article/1c36fcb075dd406195517f8baec13949
work_keys_str_mv	AT kenichiohguchi fatiguelifeestimationofsacsolderbasedoninelasticstrainanalysisusingsteppedrampwaveloading AT katsuhikosasaki fatiguelifeestimationofsacsolderbasedoninelasticstrainanalysisusingsteppedrampwaveloading AT yukiyuze fatiguelifeestimationofsacsolderbasedoninelasticstrainanalysisusingsteppedrampwaveloading AT koheifukuchi fatiguelifeestimationofsacsolderbasedoninelasticstrainanalysisusingsteppedrampwaveloading
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Fatigue life estimation of SAC solder based on inelastic strain analysis using stepped ramp wave loading

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