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Friction-stir processing of AISI 440C high-carbon martensitic stainless steel for improving hardness and corrosion resistance
Pan,L.2; Kwok,C. T.1,2; Lo,K. H.1,2
2020-03-01
Source PublicationJournal of Materials Processing Technology
ISSN0924-0136
Volume277
AbstractFriction-stir processing (FSP) has been attempted to harden the surface of a high-carbon martensitic stainless steel (AISI 440C) and to improve its corrosion resistance. Owing to high input of heat, the penetration depth of the FSPed zone increases in the range from 1.5 to 2 mm when the translational speed decreases. As the translational speed increases, higher content of retained austenite in the advancing side and center of the processed zone are obtained due to higher cooling rate. The maximum hardness of the FSPed 440C is up to 779 HV and higher than that of the conventionally hardened sample austenitized at 1200 ℃ (618 HV). The pitting corrosion resistance of the sample processed at 300 mm·min in 3.5 wt% sodium chloride solution is the lowest among the FSPed samples. It is mainly attributed to the heterogeneous microstructures at the retreating side (martensite and carbides) and advancing side and center (with martensite and retained austenite) leading to selective attack occurred at the more active region, i.e. the retreating side.
KeywordFriction-stir surface hardening Microstructure Pitting Stainless steel
DOI10.1016/j.jmatprotec.2019.116448
URLView the original
Language英语
Scopus ID2-s2.0-85072925471
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Cited Times [WOS]:8   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Department of Electromechanical Engineering,University of Macau,China
2.Institute of Applied Physics and Materials Engineering,University of Macau,China
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Pan,L.,Kwok,C. T.,Lo,K. H.. Friction-stir processing of AISI 440C high-carbon martensitic stainless steel for improving hardness and corrosion resistance[J]. Journal of Materials Processing Technology,2020,277.
APA Pan,L.,Kwok,C. T.,&Lo,K. H..(2020).Friction-stir processing of AISI 440C high-carbon martensitic stainless steel for improving hardness and corrosion resistance.Journal of Materials Processing Technology,277.
MLA Pan,L.,et al."Friction-stir processing of AISI 440C high-carbon martensitic stainless steel for improving hardness and corrosion resistance".Journal of Materials Processing Technology 277(2020).
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