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X-ray Micro Laue Diffraction and Neutron Diffraction Analysis of Residual Elastic Strains in a 1% Uniaxial Tensile Tested Nickel Alloy 600 Sample

Published online by Cambridge University Press:  01 February 2011

Jing Chao ,
Alison Mark ,
Marina Lynn Suominen Fuller ,
Rozaliya Barabash ,
N. Stewart McIntyre ,
Richard A. Holt ,
Robert J. Klassen  and
Wenjun Liu
Jing Chao
Affiliation:
[email protected], University of Western Ontario, Department of Chemistry, London, Canada
Alison Mark
Affiliation:
[email protected], Queen's University, Department of Mechanical and Materials Engineering, Kingston, Canada
Marina Lynn Suominen Fuller
Affiliation:
[email protected], University of Western Ontario, Department of Chemistry, Canada
Rozaliya Barabash
Affiliation:
[email protected], Oak Ridge National Laboratory, Materials Division, Oak Ridge, Tennessee, United States
N. Stewart McIntyre
Affiliation:
[email protected], University of Western Ontario, Department of Chemistry, London, Canada
Richard A. Holt
Affiliation:
[email protected], Queen's University, Department of Mechanical and Materials Engineering, Kingston, Canada
Robert J. Klassen
Affiliation:
[email protected], University of Western Ontario, Department of Mechanical and Materials Engineering, London, Canada
Wenjun Liu
Affiliation:
[email protected], Argonne National Laboratory, Advanced Photon Source, Argonne, Illinois, United States
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Abstract

The magnitude and distribution of elastic strain for a nickel alloy 600 (A600) sample that had been subjected to uniaxial tensile stress were measured by micro Laue diffraction (MLD) and neutron diffraction techniques. For a sample that had been dimensionally strained by 1%, both MLD and neutron diffraction data indicated that the global residual elastic strain was on the order of 10−4, however the micro-diffraction data indicated considerable grain-to-grain variability amongst individual components of the residual strain tensor. A more precise comparison was done by finding those grains in the MLD map that had appropriate <hkl> oriented in the specific directions matching those used in the neutron measurements and the strains were found to agree within the uncertainty. Large variations in strain values across the grains were noted during the MLD measurements which are reflected in the uncertainties. This is a possible explanation for the large uncertainty in the average strains measured from multiple grains during neutron diffraction.

Keywords

elastic propertiesx-ray diffraction (XRD)neutron scattering
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1137: Symposium EE – Nano-and Microscale Materials–Mechanical Properties and Behavior under Extreme Environments , 2008 , 1137-EE10-28
Copyright
Copyright © Materials Research Society 2009

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References

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