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Effect of surface mechanical attrition treatment on the microstructure of cobalt–chromium–molybdenum biomedical alloy
Author(s) -
Nkonta Daniella Tchana,
Drevet Richard,
Fauré Joël,
Benhayoune Hicham
Publication year - 2021
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.23580
Subject(s) - materials science , microstructure , selected area diffraction , molybdenum , alloy , scanning electron microscope , metallurgy , transmission electron microscopy , crystal twinning , electron diffraction , phase (matter) , electron backscatter diffraction , diffraction , composite material , nanotechnology , chemistry , optics , physics , organic chemistry
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.