Effect of surface mechanical attrition treatment on the microstructure of cobalt-chromium-molybdenum biomedical alloy.

Autor: Nkonta DT; ITheMM, Université de Reims Champagne-Ardenne (URCA), Reims, France., Drevet R; CeRTEV, Universidade Federal de São Carlos (UFSCar), São Carlos, Brazil., Fauré J; ITheMM, Université de Reims Champagne-Ardenne (URCA), Reims, France., Benhayoune H; ITheMM, Université de Reims Champagne-Ardenne (URCA), Reims, France.
Jazyk: angličtina
Zdroj: Microscopy research and technique [Microsc Res Tech] 2021 Feb; Vol. 84 (2), pp. 238-245. Date of Electronic Publication: 2020 Sep 10.
DOI: 10.1002/jemt.23580
Abstrakt: This research work describes the impact of the surface mechanical attrition treatment (SMAT) on the microstructure of cobalt-chromium-molybdenum (CoCrMo), a biomedical alloy commonly used for orthopedic applications. This surface treatment induces crystalline phases transformations characterized by X-ray diffraction (XRD) and selected area electron diffraction (SAED). The corresponding structural changes are observed from cross-section images obtained by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that the SMAT process induces the martensitic transformation of the CoCrMo alloy (from γ-fcc phase to ε-hcp phase) related to an important grain refinement due to twinning and sliding.
(© 2020 Wiley Periodicals LLC.)
Databáze: MEDLINE
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