Residual Stress and Contact Force Study for Deep Cold Rolling of Aero-engine Material

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Residual Stress and Contact Force Study for Deep Cold Rolling of Aero-engine Material

A. Prithiviraja, W. Weib

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Abstract. Deep Cold Rolling (DCR) process is used in various industries to improve the fatigue life of metallic parts by introducing work hardening, deep layer of compressive residual stresses and polished surface finish. In this paper, the influences of the angled design for a hydrostatic tool and its indentation depth to impart compressive residual stresses are studied and compared to its straight tool counterpart for treatment of IN718 material. Residual stress depth profile measurements, using the XRD technique, were employed to determine differences caused by using the angled and straight tool design. Higher rolling forces are measured in an angled tool design with a high indentation depth as compared to a straight tool design caused by the slip stick effect on the internal parts of the tool. This leads to high plastic deformation in the test material significantly affecting the compressive residual stress depth profile depending on its exisiting state.

Keywords
Residual Stress, XRD, Deep Rolling, Burnishing, Mechanical Surface Treatment, IN718

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: A. Prithiviraja, W. Weib, ‘Residual Stress and Contact Force Study for Deep Cold Rolling of Aero-engine Material’, Materials Research Proceedings, Vol. 2, pp 247-252, 2017

DOI: http://dx.doi.org/10.21741/9781945291173-42

The article was published as article 42 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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