Investigations of the Residual Stresses and Surface Integrity Generated by a Novel Mechanical Surface Strengthening

Article PDF

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. Wong

download 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.

Keywords
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

DOI: http://dx.doi.org/10.21741/9781945291173-53

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.

References
[1] D. Novovic, R. C. Dewes, D. K. Aspinwall, W. Voice and P. Bowen, The effect of machined topography and integrity on fatigue life, Int. J. Machine Tools & Manufacture 44 (2004) 125-134. http://dx.doi.org/10.1016/j.ijmachtools.2003.10.018
[2] D. T. Ardi, Y. G. Li, K. H. K. Chan, L. Blunt and M. R. Bache, Surface topography and the impact on fatigue performance, Surface Topography Metrology and Properties 3 (2015) no. 1.
[3] L. Wagner, Mechanical surface treatments on titanium, aluminium and magnesium alloys, Materials Science and Engineering A 263 (1999) 210-216. http://dx.doi.org/10.1016/S0921-5093(98)01168-X
[4] K. A. Soady, Life assessment methodologies incorporating shot peening process effects: mechanistics consideration of residual stresses and strain hardening part 1, Materials Science and Technology 29 (2013) no. 6.
[5] V. Schulze, Modern mechanical surface treatment: States, Stability, Effects, Wiley, 2005. http://dx.doi.org/10.1002/3527607811
[6] M. C. Hardy, C. Herbert, J. Kwong, W. Li, D. A. Axinte, A. R. C. Sharman, A. Encinas-Oropesa and P. J. Withers, Characterising the integrity of machined surfaces in a powder nickel alloy used in aircraft engines, Procedia CIRP 13 (2014) 411-416. http://dx.doi.org/10.1016/j.procir.2014.04.070
[7] G. G. Feldmann and T. Haubold, Mechanical surface treatment technologies for improving HCF strength and surface roughness of blisk rotors, Materials Science Forum 768-769 (2013) 510-518. http://dx.doi.org/10.4028/www.scientific.net/MSF.768-769.510
[8] G. Feldmann, W. Wei, T. Haubold and C. C. Wong, Application of vibropeening on aero-engine component, Procedia CIRP 13 (2014) 423-428. http://dx.doi.org/10.1016/j.procir.2014.04.072
[9] M. D. Sangid, J. A. Stori and P. M. Ferriera, Process characterization of vibrostrengthening and application to fatigue enhancement of aluminum aerospace components – Part I. Experimental study of process parameters, Int. J. Adv. Manufacturing Technology 53 (2010) 545-560. http://dx.doi.org/10.1007/s00170-010-2857-2
[10] M. D. Sangid, J. A. Stori and P. M. Ferriera, Process characterization of vibrostrengthening and application to fatigue enhancement of aluminum aerospace components – Part II: Process visualisation and modelling, Int. J. Adv. Manufacturing Technology 53 (2011) 461-575. http://dx.doi.org/10.1007/s00170-010-2858-1
[11] M. Kamaya, A. J. Wilkinson and J. M. Titchmarsh, Quantification of plastic strain of stainless steel and nickel alloy by electron backscatter diffraction, Acta materialia 54 (2006) 539-548. http://dx.doi.org/10.1016/j.actamat.2005.08.046
[12] D.J.Child, G.D.West and R.C.Thomson, Assessment of surface hardening effects from shot peening on a Ni-based alloy using electron backscatter diffraction techniques, Acta Materialia 59 (2011) 4825-4834. http://dx.doi.org/10.1016/j.actamat.2011.04.025
[13] W.Li, P.J.Withers, D.Axinte, M.Preuss and P.Andrews, Residual stresses in face finish turning of high strength nickel-based superalloy, J. Mat. Processing Technology 209 (2009) 4896-4902. http://dx.doi.org/10.1016/j.jmatprotec.2009.01.012
[14] P.S.Prevey, The effect of cold work on thermal stability of residual compression in surface enhanced IN718, Metal Finishing News 6 (2005).