Characterization of Residual Stresses and Retained Austenite on 416 Stainless Steel via X-Ray Diffraction Techniques

Characterization of Residual Stresses and Retained Austenite on 416 Stainless Steel via X-Ray Diffraction Techniques

T. Simmons, G. Grodzicki, J. Pineault, J. Taptich, M. Belassel, J. Nantais, M. Brauss

Abstract. Residual stress (RS) and retained austenite (RA) measurements performed using x-ray diffraction (XRD) techniques have been useful to assist in evaluating the quality of parts both in the field and in production environments for decades. Single spot checks at critical locations are often performed providing basic information for a given testing requirement at a specific location. Although this is useful information, the highest levels of RS or RA present in the component may be missed when performing single spot checks only if surface RS or RA gradients are present. To achieve a more in depth understanding of the range and distribution of RS and RA in a component, a relatively large area was characterized using the mapping approach on a heated and quenched 416 stainless steel sample. The results found using this characterization technique indicate that RS and RA levels are not uniform over the area examined; thus it has been demonstrated that the one point approach is not adequate in this instance since the lowest and highest levels of RS and RA would be missed without mapping. For this reason, it is recommended that the mapping approach be adopted whenever gradients are present to fully and efficiently characterize RS and RA and subsequently to help correctly assess the quality of the part.

Keywords
Residual Stress, Retained Austenite, X-Ray Diffraction, Mapping, Stainless Steel

Published online 9/11/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: T. Simmons, G. Grodzicki, J. Pineault, J. Taptich, M. Belassel, J. Nantais, M. Brauss, ‘Characterization of Residual Stresses and Retained Austenite on 416 Stainless Steel via X-Ray Diffraction Techniques’, Materials Research Proceedings, Vol. 6, pp 159-164, 2018

DOI: https://dx.doi.org/10.21741/9781945291890-25

The article was published as article 25 of the book Residual Stresses 2018

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] C. F. Jatczak et. al, “Retained Austenite and its Measurements by X-Ray Diffraction”, SAE SP-453, SAE, 1980.
[2] I. C. Noyan and J. B. Cohen, “Residual Stress – Measurement by Diffraction and Interpretation”, Springer-Verlag, New York, 1987.
[3] B. D. Cullity, “Elements of X-ray Diffraction”, Second Edition, Addison-Wesley, Reading Massachusetts, 1978.
[4] M.E. Hilley et.al, “Residual Stress Measurement by X-ray Diffraction” SAE HS-784, SAE, 2003.
[5] H.P. Klug, L.E. Alexander, “X-ray Diffraction Procedures for Polycrystalline and Amorphous Materials”, Second Edition, Wiley-Interscience, New York, 1974.
[6] ASTM E975-03, “Standard Practice for X-Ray Determination of Retained Austenite in Steel with Near Random Crystallographic Orientation”, 2008.