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Analysis of Residual Stress States in Coarse Grained and Single Crystal Nickel-Base Superalloys

Published online by Cambridge University Press:  06 March 2019

W. Reimers
W. Reimers*
Affiliation:
Hahn-Meitner-Institut, Bereich Strukturforschung, Glienicker Str. 100, D -14 109 Berlin, Germany
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Abstract

The single crystal measuring and evaluation technique allows the analysis of stress states in large grained and single crystalline materials. The technique is based on the analysis of the orientation of crystallites under study. Using a fouf-circle-diffractometer, the knowledge of the orientation matrix allows the calculation of the diffractometer setting for every given reflection (hkl). After experimental determination of the precise diffraction angles 20 for at least six reflections of an individual crystallite, its strain tensor components can be obtained by applying least-squares methods. The stress tensor referred to the crystal axes system is calculated using the single crystal elastic constants.

The practical use of this measuring and evaluation technique is demonstrated on coarse grained and single crystal nickel-base superalloys and monocrystalline materials.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 39: Forty-Fourth Annual Conference on Applications of X-ray Analysis, July 31 - August 4, 1995 , 1995 , pp. 211 - 223
Copyright
Copyright © International Centre for Diffraction Data 1995

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