A methodology to determine the elastic moduli of crystals by matching experimental and simulated lattice strain pole figures using discrete harmonics

Wielewski, E. , Boyce, D. E., Park, J.-S., Miller, M. P. and Dawson, P. R. (2017) A methodology to determine the elastic moduli of crystals by matching experimental and simulated lattice strain pole figures using discrete harmonics. Acta Materialia, 126, pp. 469-480. (doi:10.1016/j.actamat.2016.12.026)

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Abstract

Determining reliable single crystal material parameters for complex polycrystalline materials is a significant challenge for the materials community. In this work, a novel methodology for determining those parameters is outlined and successfully applied to the titanium alloy, Ti-6Al-4V. Utilizing the results from a lattice strain pole figure experiment conducted at the Cornell High Energy Synchrotron Source, an iterative approach is used to optimize the single crystal elastic moduli by comparing experimental and simulated lattice strain pole figures at discrete load steps during a uniaxial tensile test. Due to the large number of unique measurements taken during the experiments, comparisons were made by using the discrete spherical harmonic modes of both the experimental and simulated lattice strain pole figures, allowing the complete pole figures to be used to determine the single crystal elastic moduli.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Wielewski, Dr Euan and Dawson, Professor Paul
Authors: Wielewski, E., Boyce, D. E., Park, J.-S., Miller, M. P., and Dawson, P. R.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Acta Materialia
Publisher:Elsevier
ISSN:1359-6454
ISSN (Online):1873-2453
Published Online:14 January 2017
Copyright Holders:Copyright © 2017 Elsevier Ltd.
First Published:First published in Acta Materialia 126:469-480
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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