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Influence of Crystallographic Texture on Young's Modulus of Various Alloy 82H Welds

Published online by Cambridge University Press:  08 April 2011

Steven R. Claves  and
William J. Mills
Steven R. Claves*
Affiliation:
Materials Technology, Bechtel Marine Propulsion Corporation, West Mifflin, PA 15221, USA
William J. Mills
Affiliation:
Materials Technology, Bechtel Marine Propulsion Corporation, West Mifflin, PA 15221, USA
*
Corresponding author. E-mail: [email protected]
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Abstract

Electron backscatter diffraction (EBSD) was employed to analyze the microstructure and texture of four different Alloy 82H gas tungsten arc welds that previously underwent static and dynamic modulus testing. The Young's moduli were shown to differ among the various welds, but also within each weld, dependent upon the direction measured. These differences were attributed to anisotropy of the crystallographic textures, which were described using inverse pole figures with respect to each of the weld's three orthogonal axes. The Young's modulus demonstrated a strong correlation with the texture, consistent with single crystal experiments. Sample directions containing a large population of {100} orientations had the lowest Young's modulus, while those with {111} grains possessed the highest. Microstructures with {110} textures were closer to the average modulus value of 207 GPa (30.0 Msi). X-ray diffraction texture measurements on four samples were used to verify the EBSD results.

Keywords

EBSDYoung's modulusmicrotextureAlloy 82HweldsGTAanisotropy
Type
Electron Backscatter Diffraction Special Section
Information
Microscopy and Microanalysis , Volume 17 , Issue 3 , June 2011 , pp. 341 - 349
Copyright
Copyright © Microscopy Society of America 2011

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References

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