Microstructure evolution and formation mechanism of laser-ignited SHS joining between Cf/Al composites and TiAl alloys with Ni-Al-Ti interlayer-中国期刊网

摘要 Inthisstudy,C_f/AlcompositesandTiAlalloyswerejoinedbyanewmethodnamedlaser-ignitedselfpropagatingsynthesis(SHS).Mixedpowdersof63.0Ni-31.9Al-5.1Ti(wt%)wereusedasjoininginterlayer.Perfectjointwasgot.ThemicrostructureevolutionandformationmechanismoftheSHSjointwereinvestigatedbyscanningelectronmicroscopy(SEM),energy-dispersivespectroscopy(EDS)andX-raydiffraction(XRD).Resultsshowthatlocalizedmeltingoccursonbothsides.Oneγ-Ni_(0.35)Al_(0.30)Ti_(0.35)andtwoNi-Alreactionlayersform,respectively,intheTiAl/interlayerandC_f/Al/interlayerinterfaces.ThecombustionofNi-Al-TiinterlayerbeginswiththesharpreactionofNiandAl.TheinterlayerproductisaeutecticorganizationofNiAlandAl-richγ.

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Microstructure evolution and formation mechanism of laser-ignited SHS joining between Cf/Al composites and TiAl alloys with Ni-Al-Ti interlayer

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Microstructure evolution and formation mechanism of laser-ignited SHS joining between Cf/Al composites and TiAl alloys with Ni-Al-Ti interlayer

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