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Microstructure and dry sliding wear behavior of laser clad AlCrNiSiTi multi-principal element alloy coatings 被引量:7
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作者 Can Huang yi-zhou tang +4 位作者 Yong-Zhong Zhang An-Ping Dong Jian Tu Lin-Jiang Chai Zhi-Ming Zhou 《Rare Metals》 SCIE EI CAS CSCD 2017年第7期562-568,共7页
The approximately equimolar ratio A1CrNiSiTi multi-principal element alloy (MPEA) coatings were fab- ricated by laser cladding on Ti-6Al-4V (Ti64) alloy. Scanning electron microscopy (SEM), equipped with an ener... The approximately equimolar ratio A1CrNiSiTi multi-principal element alloy (MPEA) coatings were fab- ricated by laser cladding on Ti-6Al-4V (Ti64) alloy. Scanning electron microscopy (SEM), equipped with an energy-dispersive spectroscopy (EDS), and X-ray diffrac- tion (XRD) were used to characterize the microstructure and composition. Investigations show that the coatings consist of (Ti, Cr)5Si3 and NiA1 phases, formed by in situ reaction. The phase composition is initially explicated according to obtainable binary and ternary phase diagrams, and the formation Gibbs energy of TisSi3, VsSi3 and CrsSi3. Dry sliding reciprocating friction and wear tests of the A1CrNiSiTi coating and Ti64 alloy substrate without coating were evaluated. A surface mapping profiler was used to evaluate the wear volume. The worn surface was characterized by SEM-EDS. The hardness and wear resistance of the A1CrNiSiTi coating are well compared with that of the basal material (Ti64). The main wear mechanism of the AICrNiSiTi coating is slightly adhesive transfer from GCrl5 counterpart, and a mixed layer com- posed of transferred materials and oxide is formed. 展开更多
关键词 Laser cladding Multi-principal element alloy MICROSTRUCTURE Wear behavior
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