Ultra Low-Cycle Fatigue Behavior Comparison between Additively Manufactured and Rolled 17-4 PH (AISI 630) Stainless Steels

This study investigates the mechanical behavior of additively manufactured (AM) 17-4 PH (AISI 630) stainless steels and compares their behavior to traditionally produced wrought counterparts. The goal of this study is to understand the key parameters influencing AM 17-4 PH steel fatigue life under U...

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Autores principales:	David Gonzalez-Nino, Timothy Strasser, Gary S. Prinz
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ultra low-cycle fatigue metal additive manufacturing selective laser melting Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/0275dc0fbba04c55adfccccfae866cea
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spelling	oai:doaj.org-article:0275dc0fbba04c55adfccccfae866cea2021-11-25T18:21:30ZUltra Low-Cycle Fatigue Behavior Comparison between Additively Manufactured and Rolled 17-4 PH (AISI 630) Stainless Steels10.3390/met111117262075-4701https://doaj.org/article/0275dc0fbba04c55adfccccfae866cea2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1726https://doaj.org/toc/2075-4701This study investigates the mechanical behavior of additively manufactured (AM) 17-4 PH (AISI 630) stainless steels and compares their behavior to traditionally produced wrought counterparts. The goal of this study is to understand the key parameters influencing AM 17-4 PH steel fatigue life under ULCF conditions and to develop simple predictive models for fatigue-life estimation in AM 17-4 steel components. In this study, both AM and traditionally produced (wrought) material samples are fatigue tested under fully reversed (R = −1) strain controlled (2–4% strain) loading and characterized using micro-hardness, x-ray diffraction, and fractography methods. Results indicate decreased fatigue life for AM specimens as compared to wrought 17-4 PH specimens due to fabrication porosity and un-melted particle defect regions which provide a mechanism for internal fracture initiation. Heat treatment processes performed in this work, to both the AM and wrought specimens, had no observable effect on ULCF behavior. Result comparisons with an existing fatigue prediction model (the Coffin–Manson universal slopes equation) demonstrated consistent over-prediction of fatigue life at applied strain amplitudes greater than 3%, likely due to inherent AM fabrication defects. An alternative empirical ULCF capacity equation is proposed herein to aid future fatigue estimations in AM 17-4 PH stainless steel components.David Gonzalez-NinoTimothy StrasserGary S. PrinzMDPI AGarticleultra low-cycle fatiguemetal additive manufacturingselective laser meltingMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1726, p 1726 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ultra low-cycle fatigue metal additive manufacturing selective laser melting Mining engineering. Metallurgy TN1-997
spellingShingle	ultra low-cycle fatigue metal additive manufacturing selective laser melting Mining engineering. Metallurgy TN1-997 David Gonzalez-Nino Timothy Strasser Gary S. Prinz Ultra Low-Cycle Fatigue Behavior Comparison between Additively Manufactured and Rolled 17-4 PH (AISI 630) Stainless Steels
description	This study investigates the mechanical behavior of additively manufactured (AM) 17-4 PH (AISI 630) stainless steels and compares their behavior to traditionally produced wrought counterparts. The goal of this study is to understand the key parameters influencing AM 17-4 PH steel fatigue life under ULCF conditions and to develop simple predictive models for fatigue-life estimation in AM 17-4 steel components. In this study, both AM and traditionally produced (wrought) material samples are fatigue tested under fully reversed (R = −1) strain controlled (2–4% strain) loading and characterized using micro-hardness, x-ray diffraction, and fractography methods. Results indicate decreased fatigue life for AM specimens as compared to wrought 17-4 PH specimens due to fabrication porosity and un-melted particle defect regions which provide a mechanism for internal fracture initiation. Heat treatment processes performed in this work, to both the AM and wrought specimens, had no observable effect on ULCF behavior. Result comparisons with an existing fatigue prediction model (the Coffin–Manson universal slopes equation) demonstrated consistent over-prediction of fatigue life at applied strain amplitudes greater than 3%, likely due to inherent AM fabrication defects. An alternative empirical ULCF capacity equation is proposed herein to aid future fatigue estimations in AM 17-4 PH stainless steel components.
format	article
author	David Gonzalez-Nino Timothy Strasser Gary S. Prinz
author_facet	David Gonzalez-Nino Timothy Strasser Gary S. Prinz
author_sort	David Gonzalez-Nino
title	Ultra Low-Cycle Fatigue Behavior Comparison between Additively Manufactured and Rolled 17-4 PH (AISI 630) Stainless Steels
title_short	Ultra Low-Cycle Fatigue Behavior Comparison between Additively Manufactured and Rolled 17-4 PH (AISI 630) Stainless Steels
title_full	Ultra Low-Cycle Fatigue Behavior Comparison between Additively Manufactured and Rolled 17-4 PH (AISI 630) Stainless Steels
title_fullStr	Ultra Low-Cycle Fatigue Behavior Comparison between Additively Manufactured and Rolled 17-4 PH (AISI 630) Stainless Steels
title_full_unstemmed	Ultra Low-Cycle Fatigue Behavior Comparison between Additively Manufactured and Rolled 17-4 PH (AISI 630) Stainless Steels
title_sort	ultra low-cycle fatigue behavior comparison between additively manufactured and rolled 17-4 ph (aisi 630) stainless steels
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0275dc0fbba04c55adfccccfae866cea
work_keys_str_mv	AT davidgonzaleznino ultralowcyclefatiguebehaviorcomparisonbetweenadditivelymanufacturedandrolled174phaisi630stainlesssteels AT timothystrasser ultralowcyclefatiguebehaviorcomparisonbetweenadditivelymanufacturedandrolled174phaisi630stainlesssteels AT garysprinz ultralowcyclefatiguebehaviorcomparisonbetweenadditivelymanufacturedandrolled174phaisi630stainlesssteels
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Ultra Low-Cycle Fatigue Behavior Comparison between Additively Manufactured and Rolled 17-4 PH (AISI 630) Stainless Steels

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