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Advances in Tribology
Volume 2012, Article ID 723919, 12 pages
Research Article

Surface Layer Properties after Successive EDM or EDA and Then Superficial Roto-Peen Machining

Institute of Manufacturing Technology, Warsaw University of Technology, 02-524 Warsaw, Poland

Received 19 December 2011; Revised 3 April 2012; Accepted 3 April 2012

Academic Editor: J. Paulo Davim

Copyright © 2012 Agnieszka Dmowska et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The paper presents the results of the influence of basic electrical discharge machining EDM parameters and electrical discharge alloying EDA parameters on surface layer properties and on selected performance properties of machine parts after such machining but also the influence of superficial cold-work treatment applied after the EDM of EDA on modification of these properties. The investigations included texture of the surface, metallographic microstructure, microhardness distribution, fatigue strength, and resistance to abrasive wear. It was proved that the application of the roto-peen after the EDM and the EDA resulted in lowering roughness height up to 70%, the elevation of surface layer microhardness by 300–700 μHV, and wear resistance uplifting by 300%.