Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Effect of High Energy Shot Peening on Properties of Stellite 6 Layer Coated on AISI 316 Using Electro-Spark Deposition

Document Type : Original Reaearch Article

Authors
Mahdi Gholampour 1
Mohamad Hasan Ameri 2
1 Assistant Professor, Department of Physics, Faculty of Basic Sciences, Imam Ali University, Tehran, Tehran, Iran
2 M. Sc., Department of Physics, Faculty of Basic Sciences, Imam Ali University, Tehran, Tehran, Iran
10.30501/jamt.2021.243604.1115
Abstract
Stellite-6 alloy was deposited on a SS316 stainless steel substrate by Electro-Spark Deposition; subsequently, the thickness of deposition layer was around 100 ± 10 micron. High Energy Shot Peening process was applied to improve coated layer properties. Microstructure, chemical composition, micro hardness variation in cross sections, wear properties and visual check for discontinuities of coated layer were studied by employing Field Emission Scanning Electron Microscopy, Optical Microscopy, EDS line scan and pin on disk wear test, before and after the high energy shot peening process. The results show decreasing the surface roughness from 14 to 4.5 micron and improving the micro-hardness of coated layer from 450 to 540 HVN due to High Energy Shot Peening process on the Electro-Spark Deposition coated layers. On the other hand, the wear properties of the coating are improved, the number of defects such as porosities is reduced, and micro-cracks and defects in melts are healed due to compressive residual stress and severe wax deformation.

Subjects

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Journal of Advanced Materials and Technologies
Volume 10, Issue 2
Summer 2021
Pages 83-96

  • Receive Date 14 September 2020
  • Revise Date 10 November 2020
  • Accept Date 04 October 2021