Phase constituents and microhardness of laser alloyed Ti–6Al–4 V alloy
作者： D. I. Adebiyi , A. P. I. Popoola , S. L. Pityana
DOI: 10.2351/1.4906388
关键词:
摘要: Ti-6Al-4 V alloy possesses excellent mechanical and chemical properties which make it a favorite material for the automobile, aerospace aeronautical industries, but has low hardenability poor wear resistance. This is because of its resistance to plastic shearing, work hardening protection offered by surface oxide. study was designed modify microstructure enhance microhardness two-phase alloy. The laser coated with premixed ratio Mo + Zr + Stellite 6 using 4.4 kW continuous wave Rofin Sinar Nd:YAG processing system fitted an off-axis nozzle powder feeding. Optical scanning electron microscopes were used microstructural evolution in coatings, while phase constituents identified studied x-ray diffractometer. A through-thickness hardness indentation measured Vickers tester. New intermetallic compounds phases precipitated confirmed metallurgical reaction between substrate mix. β-phase titanium retained. attributed presence Mo, beta stabilizer, There considerable increase from 357.6 HV0.1 native 1145.2 composite coating.
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