Ultrasonic impact treatment of CoCrMo alloy: Surface composition and properties
作者： S.P. Chenakin , V.S. Filatova , I.N. Makeeva , M.A. Vasylyev
DOI: 10.1016/J.APSUSC.2017.03.004
关键词:
摘要: Abstract X-ray photoelectron spectroscopy, time-of-flight secondary ion mass spectrometry and diffraction were employed to study the effect of intense mechanical treatment on surface chemical state, composition structure a commercial biomedical CoCrMo alloy (‘Bondi-Loy’). The ultrasonic impact in air with duration up 30 s was found cause deformation-enhanced oxidation deformation-induced segregation components impurities from bulk. compositionally inhomogeneous mixed oxide layer formed under composed mainly Cr 2 O 3 silicon admixture CoO, MoO , iron oxide/hydroxide, latter being transferred onto steel pin. promoted progressive accumulation carbon due its bulk uptake hydrocarbons ambient; concurrently, dissolution/refinement carbides originally present as-cast occurred. gave rise two-fold increase volume fraction martensitic hcp e-phase, 30% microhardness improved resistance corrosion solution artificial saliva compared as-polished alloy.
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