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Fabrication of stainless steel 316L/TiB2 composite coating via friction surfacing
Guo, D.1; Kwok, C. T.1,2; Chan, S. L. I.3
Conference NameInternational Thin Films Conference (TACT)
Conference DateOCT 15-18, 2017
Conference PlaceNatl Dong Hwa Univ, Hualien, TAIWAN
Publication PlacePO BOX 564, 1001 LAUSANNE, SWITZERLAND

Stainless steel 316L/TiB2 composite coatings were fabricated with different TiB2 contents using friction surfacing (FS) on the stainless steel 304 substrate. One or two blind holes were drilled at different positions axially on the cylindrical 316L consumable rods for keeping micron-size TiB2 powder as the reinforcement in the coatings. After FS, TiB2 was found to be embedded into the austenitic matrix and also partially decomposed leading to the formation of FeB2 and FeTi under high temperature and high strain rate. Compared with the friction-surfaced (FSed) 316L coating, the grain size of austenite in the TiB2 reinforced composite coating was refined from 7.8 to 0.64 mu m, where austenite grains closed to {111} tends to transform to FeTi. Compared with monolithic 316L coating, the hardness of the FSed 316L/TiB2 coating was significantly increased from 219 to 1056 HV0.2 owing to the presence of TiB2 and intermetallic phases, finer austenitic grains and higher misorientation density. The pitting corrosion resistance of the FSed 316L coating was improved due to the elimination of MnS inclusions whereas the FSed 316L/TiB2 coating possessed lower pitting resistance due to the presence of FeTi. Moreover, the passivity of the 316L/TiB2 coating in 3.5% NaCl solution was preserved but the capability of re-passivation was degraded.

KeywordFriction Surfacing Stainless Steel Titanium Diboride Metal Matrix Composite Pitting Corrosion Crystallography
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Indexed BySCI ; CPCI
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000444660500097
The Source to ArticleWOS
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Cited Times [WOS]:8   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
Affiliation1.Department of Electromechanical Engineering, University of Macau, China
2.Institute of Applied Physics and Materials Engineering, University of Macau, China
3.School of Materials Science and Engineering, University of New South Wales, Sydney, Australia
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Guo, D.,Kwok, C. T.,Chan, S. L. I.. Fabrication of stainless steel 316L/TiB2 composite coating via friction surfacing[C]. PO BOX 564, 1001 LAUSANNE, SWITZERLAND:ELSEVIER SCIENCE SA,2018:936-948.
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