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Electron Backscatter Diffraction and Transmission Kikuchi Diffraction Analysis of an Austenitic Stainless Steel Subjected to Surface Mechanical Attrition Treatment and Plasma Nitriding

Published online by Cambridge University Press:  03 July 2015

Gwénaëlle Proust ,
Delphine Retraint ,
Mahdi Chemkhi ,
Arjen Roos  and
Clemence Demangel
Gwénaëlle Proust*
Affiliation:
School of Civil Engineering, The University of Sydney, NSW 2006, Australia
Delphine Retraint
Affiliation:
Charles Delaunay Institute, University of Technology of Troyes (UTT), LASMIS, UMR STMR CNRS 6279, 12 rue Marie Curie, CS 42060, 10004 Troyes Cedex, France
Mahdi Chemkhi
Affiliation:
Charles Delaunay Institute, University of Technology of Troyes (UTT), LASMIS, UMR STMR CNRS 6279, 12 rue Marie Curie, CS 42060, 10004 Troyes Cedex, France
Arjen Roos
Affiliation:
Charles Delaunay Institute, University of Technology of Troyes (UTT), LASMIS, UMR STMR CNRS 6279, 12 rue Marie Curie, CS 42060, 10004 Troyes Cedex, France
Clemence Demangel
Affiliation:
CRITT-MDTS, 3 bd J. Delautre, 08000 Charleville-Mézières, France
*
*Corresponding author. [email protected]
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Abstract

Austenitic 316L stainless steel can be used for orthopedic implants due to its biocompatibility and high corrosion resistance. Its range of applications in this field could be broadened by improving its wear and friction properties. Surface properties can be modified through surface hardening treatments. The effects of such treatments on the microstructure of the alloy were investigated here. Surface Mechanical Attrition Treatment (SMAT) is a surface treatment that enhances mechanical properties of the material surface by creating a thin nanocrystalline layer. After SMAT, some specimens underwent a plasma nitriding process to further enhance their surface properties. Using electron backscatter diffraction, transmission Kikuchi diffraction, energy dispersive spectroscopy, and transmission electron microscopy, the microstructural evolution of the stainless steel after these different surface treatments was characterized. Microstructural features investigated include thickness of the nanocrystalline layer, size of the grains within the nanocrystalline layer, and depth of diffusion of nitrogen atoms within the material.

Keywords

stainless steelsurface mechanical attrition treatment (SMAT)plasma nitridingelectron backscatter diffraction (EBSD)transmission Kikuchi diffraction (TKD)severe plastic deformation
Type
Materials Applications and Techniques
Information
Microscopy and Microanalysis , Volume 21 , Issue 4 , August 2015 , pp. 919 - 926
Copyright
© Microscopy Society of America 2015 

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