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Simultaneous Residual Stress and Retained Austenite Measurement by X-Ray Diffraction

  • C. O. Ruud
  • G. H. Pennington
  • E. M. Brauss
  • S. D. Weedman
Conference paper

Abstract

A new fiber optic based XRD instrument is described that is capable of measuring simultaneously both residual stresses and phase composition present in steels. The hardening of steel requires that the material first be heated to a high enough temperature to produce a face-centered cubic polycrystalline solid solution called austenite. The material is then rapidly quenched to form a hard, metastable body-centered tetragonal solid solution called martensite. In practice, the transformation is incomplete, leaving some austenite at room temperature. Because the presence of austenite is often detrimental to the quality of the steel, it is of considerable interest to be able to quantitatively determine the amount of the austenite phase present (the retained austenite), as well as the amount of residual stress induced in the martensite.

This paper describes a new three detector XRD instrument that is capable of making simultaneous measurement of both residual stresses and retained austenite in steels at the same location on the sample in a few seconds.

Keywords

Residual Stress Residual Stress Measurement Diffract Radiation Short Measurement Time Untransformed Austenite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    SAE, Residual Stress Measurement by X-Ray Diffraction -J784a (Soc. of Auto. Eng., Warrendale, PA, 1971 ).Google Scholar
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    C. O. Ruud, in Nondestructive Methods for Material •..,’, edited by C. O. Ruud and R. E. Green, Jr. (Plenum Press, New York, 1984), Vol. 1, pp. 32–37.Google Scholar
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    B. D. Cullity, Elements of X-Ray Diffraction Second Edition ( Addison-Wesley, Reading, MA, 1978 ).Google Scholar
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Copyright information

© Springer-Verlag Berlin Heidelberg 1989

Authors and Affiliations

  • C. O. Ruud
    • 1
  • G. H. Pennington
    • 2
  • E. M. Brauss
    • 3
  • S. D. Weedman
    • 1
  1. 1.Materials Research LaboratoryThe Pennsylvania State UniversityUniversity ParkUSA
  2. 2.Denver X-Ray Instruments, IncAltoonaUSA
  3. 3.Proto ManufacturingOld CastleCanada

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