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Article: Revealing hydrogen-induced delayed fracture in ferrite-containing quenching and partitioning steels

TitleRevealing hydrogen-induced delayed fracture in ferrite-containing quenching and partitioning steels
Authors
KeywordsQP steels
Hydrogen embrittlement
Deep-drawn cups
Slow strain rate tests
Retained austenite
Issue Date2018
PublisherElsevier Ltd. The Journal's web site is located at https://www.journals.elsevier.com/materialia
Citation
Materialia, 2018, v. 4, p. 260-267 How to Cite?
AbstractHydrogen-induced delayed fracture (HIDF) of two ferrite-containing quenching and partitioning (QP) steels, QP980 and QP1180, has been studied by deep-drawn cup tests and slow strain rate tests (SSRT) in the present work. It is found that QP980 has better delayed fracture resistance than QP1180 due to both volume fraction and distribution of ferrite. Other factors, such as residual stress, plastic strain, retained austenite and strain-induced fresh martensite, are also carefully considered, but cannot account for the difference. In the QP steels, hydrogen-induced cracks nucleate in sensitive regions such as retained austenite or strain-induced fresh martensite, and prefer to propagate along prior austenite grain boundaries (PAGBs) and martensite packet boundaries. We also found that ferrite in QP steels can be used to blunt hydrogen-induced cracks, and interrupt the continuity of PAGBs and packet boundaries. QP980 steel has a higher volume fraction of interconnected ferrite, and discontinuous PAGBs and martensite packet boundaries, which are the main mechanisms responsible for the better HIDF resistance of QP980. Therefore, it is proposed that an appropriate volume fraction and distribution of ferrite phase should be present in QP steels for better HIDF resistance.
Persistent Identifierhttp://hdl.handle.net/10722/289363
ISSN
2023 Impact Factor: 3.0
2023 SCImago Journal Rankings: 0.833
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWANG, Z-
dc.contributor.authorLUO, ZC-
dc.contributor.authorHuang, MX-
dc.date.accessioned2020-10-22T08:11:35Z-
dc.date.available2020-10-22T08:11:35Z-
dc.date.issued2018-
dc.identifier.citationMaterialia, 2018, v. 4, p. 260-267-
dc.identifier.issn2589-1529-
dc.identifier.urihttp://hdl.handle.net/10722/289363-
dc.description.abstractHydrogen-induced delayed fracture (HIDF) of two ferrite-containing quenching and partitioning (QP) steels, QP980 and QP1180, has been studied by deep-drawn cup tests and slow strain rate tests (SSRT) in the present work. It is found that QP980 has better delayed fracture resistance than QP1180 due to both volume fraction and distribution of ferrite. Other factors, such as residual stress, plastic strain, retained austenite and strain-induced fresh martensite, are also carefully considered, but cannot account for the difference. In the QP steels, hydrogen-induced cracks nucleate in sensitive regions such as retained austenite or strain-induced fresh martensite, and prefer to propagate along prior austenite grain boundaries (PAGBs) and martensite packet boundaries. We also found that ferrite in QP steels can be used to blunt hydrogen-induced cracks, and interrupt the continuity of PAGBs and packet boundaries. QP980 steel has a higher volume fraction of interconnected ferrite, and discontinuous PAGBs and martensite packet boundaries, which are the main mechanisms responsible for the better HIDF resistance of QP980. Therefore, it is proposed that an appropriate volume fraction and distribution of ferrite phase should be present in QP steels for better HIDF resistance.-
dc.languageeng-
dc.publisherElsevier Ltd. The Journal's web site is located at https://www.journals.elsevier.com/materialia-
dc.relation.ispartofMaterialia-
dc.subjectQP steels-
dc.subjectHydrogen embrittlement-
dc.subjectDeep-drawn cups-
dc.subjectSlow strain rate tests-
dc.subjectRetained austenite-
dc.titleRevealing hydrogen-induced delayed fracture in ferrite-containing quenching and partitioning steels-
dc.typeArticle-
dc.identifier.emailHuang, MX: mxhuang@hku.hk-
dc.identifier.authorityHuang, MX=rp01418-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.mtla.2018.09.022-
dc.identifier.scopuseid_2-s2.0-85061031935-
dc.identifier.hkuros317296-
dc.identifier.volume4-
dc.identifier.spage260-
dc.identifier.epage267-
dc.identifier.isiWOS:000535869200029-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl2589-1529-

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