MICROSCOPIC MORPHOLOGY AND MICROSTRUCTURE OFTi-NANDTi-NiPHASE BETWEEN THE DILUTION ZONE AND THE CLAD ZONE IN LASER REMELTINGNiCrBSi/TiNLAYER ONTi-6Al-4VALLOY SURFACE

Rongxiang Liu (), Lixin Guo and Tingquan Lei
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Rongxiang Liu: School of Material Science and Engineering, Harbin Institute of Technology, P. O. Box 433, Harbin 150001, P. R. China
Lixin Guo: School of Material Science and Engineering, Harbin Institute of Technology, P. O. Box 433, Harbin 150001, P. R. China
Tingquan Lei: School of Material Science and Engineering, Harbin Institute of Technology, P. O. Box 433, Harbin 150001, P. R. China

Surface Review and Letters (SRL), 2004, vol. 11, issue 06, 497-502

Abstract: The microscopic morphology and microstructure ofTi-NandTi-Niphase between the dilution zone and the clad zone in laser remeltingNiCrBSi/TiNlayer on aTi-6Al-4Valloy were characterized using TEM and SEM. The experimental results showed that during laser irradiation heating,TiNparticles were partially dissolved into the meltedNi-base alloy, and the dissolvedTiandNatoms were precipitated in the form ofTiN,TiN0.3.Tiexhibits height activity, it combines withNiformingTi2Ni,TiNimatrix intermetallic during laser remelting, faults exist in theTi2NiandTiNiphase, and crystal lattice ofTiNiphase is superlattice. Lastly, the cause of the formation of theTi-NandTi-Niphase is discussed.

Keywords: Titanium alloys; microstructure; laser remelting; interface (search for similar items in EconPapers)
Date: 2004
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DOI: 10.1142/S0218625X04006530

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