UM  > Faculty of Science and Technology  > DEPARTMENT OF ELECTROMECHANICAL ENGINEERING
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Friction surfacing of AISI 904L super austenitic stainless steel coatings: Microstructure and properties
Guo, D.W.; Kwok, C. T.; Chan, S.L.I.; Tam, L. M.
2021-02-25
Source PublicationSurface and Coatings Technology
ISSN0257-8972
Pages126811----
AbstractMicrostructure, texture, pitting corrosion resistance and hardness of surfaces and cross-sections of the friction surfaced (FSed) super austenitic stainless steel 904L coatings fabricated at various spindle speeds were investigated. The microstructure of the coatings was governed by both dynamic recovery (DRV) and continuous dynamic recrystallization (cDRX) owing to the high stacking fault energy (SFE) of 904L. The grain orientations in DRV were in A2* shear texture component, while the rotated cube textures were related to the cDRXed grains. Immersion tests of the FSed coatings in 3.07 mol/L Cl􀀀 solution showed that the corrosion pits were slightly preferred to generate at the {111} DRVed grains on the coating surfaces, since these grains were likely to have a higher elastic strain during FS. Compared with AISI 304, the pitting potential of the FSed coatings in 3.5 wt% NaCl solution was significantly shifted to nobler direction and also insensitive to spindle speed owing to the high SFE of 904L. However, the passive films of the FSed coatings were thinner and more difficult to reform, as evidenced by slightly larger average pit diameters and lower protection potentials owing to the high residual stress caused by FS.
KeywordFriction surfacing Super austenitic stainless steel Pitting corrosion Hardness
Language英語English
The Source to ArticlePB_Publication
PUB ID58754
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorKwok, C. T.
Recommended Citation
GB/T 7714
Guo, D.W.,Kwok, C. T.,Chan, S.L.I.,et al. Friction surfacing of AISI 904L super austenitic stainless steel coatings: Microstructure and properties[J]. Surface and Coatings Technology,2021:126811----.
APA Guo, D.W.,Kwok, C. T.,Chan, S.L.I.,&Tam, L. M..(2021).Friction surfacing of AISI 904L super austenitic stainless steel coatings: Microstructure and properties.Surface and Coatings Technology,126811----.
MLA Guo, D.W.,et al."Friction surfacing of AISI 904L super austenitic stainless steel coatings: Microstructure and properties".Surface and Coatings Technology (2021):126811----.
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