Investigations of the Residual Stresses and Surface Integrity Generated by a Novel Mechanical Surface Strengthening
D.T. Ardi, W. Wei, I. Parr, G. Feldmann, A. Aramcharoen, C.C. Wongdownload PDF
Abstract. A novel mechanical surface treatment has been investigated for its ability to introduce compressive residual stresses as well as low cold work and surface roughness to metallic components, all of which are known to contribute to fatigue performance enhancement. Comprehensive evaluation of the surface integrity is therefore crucial for surfaces of load bearing components where fatigue life is a concern. The novel treatment involves submerging a work piece within a vibratory chamber filled with hardened stainless steel media, analogous to the mass finishing process. During the treatment, the work piece’s surface is peened and polished simultaneously through the normal and shear stresses generated by impacts between the work piece and steel media. The surface integrity generated by this treatment is intimately related to the processing parameters. This work focuses on measurements of residual stresses and cold work distribution in the near-surface layers as well as surface topography generated at different stages of processing. Such measurements allow for process optimisation as well as a better understanding on the contribution of the different aspects of surface integrity to mechanical performance, particularly fatigue.
Cold Work, Electron Back-Scatter Diffraction, Residual Stress, RR1000, Surface Strengthening, X-Ray Diffraction
Published online 12/22/2016, 6 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: D.T. Ardi, W. Wei, I. Parr, G. Feldmann, A. Aramcharoen, C.C. Wong, ‘Investigations of the Residual Stresses and Surface Integrity Generated by a Novel Mechanical Surface Strengthening’, Materials Research Proceedings, Vol. 2, pp 311-316, 2017
The article was published as article 53 of the book Residual Stresses 2016
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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