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Experimental determination of a representative texture and insight into the range of significant neighboring grain interactions via orientation and misorientation statistics

Bodelot, Laurence and Ravichandran, Guruswami (2014) Experimental determination of a representative texture and insight into the range of significant neighboring grain interactions via orientation and misorientation statistics. International Journal of Materials Research, 105 (2). pp. 117-129. ISSN 1862-5282. http://resolver.caltech.edu/CaltechAUTHORS:20140325-093954873

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Abstract

The mechanical response of polycrystalline metallic materials is heavily influenced by the orientations of their grains. To predict polycrystalline behavior more accurately, crystal plasticity models account for grain orientations and also, sometimes, for interactions between neighboring grains. However, these models often lack sound experimental input or validation. Furthermore, experimental studies themselves rarely tackle simply the concept of representativity in terms of texture; neither do they try to analyze up to what range neighbor interactions appear to be significant. In this article, we address both aforementioned issues in a single and easily implementable framework by performing extensive statistical analyses of discrete raw orientation and misorientation data respectively, obtained by means of electron back-scattered diffraction on thousand-grain microstructures. First, we show that the analysis of orientation statistics helps determine whether an experimental dataset can be considered as a microstructurally representative volume element in terms of texture. Second, we explain how the statistical processing of misorientations can shed some light on the range of neighbors that have a significant weight in the misorientation distributions and possibly on the grain interactions.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.3139/146.111007DOIArticle
http://www.hanser-elibrary.com/doi/abs/10.3139/146.111007PublisherArticle
Additional Information:© 2014 Carl Hanser Verlag GmbH & Co. Received May 6, 2013; accepted August 20, 2013; online since November 4, 2013. This paper is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DEFC52-08NA28613, which is gratefully acknowledged. The authors thank Professor Michael Ortiz for fruitful discussions. Electron Backscatter Diffraction was performed using the SEM facilities at the Geological and Planetary Science (GPS) Division at Caltech. The authors acknowledge Dr. Chi Ma from GPS for his valuable technical advice regarding EBSD as well as Dr. Eva Heripre from LMS who performed the EBSD scan on the aluminum sample.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Department of Energy (DOE) National Nuclear Security AdministrationDEFC52-08NA28613
Subject Keywords:Polycrystals; Electron back-scattered diffraction; Crystallographic orientations; Microstructure representative volume element; Neighbor interactions
Record Number:CaltechAUTHORS:20140325-093954873
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140325-093954873
Official Citation:Experimental determination of a representative texture and insight into the range of significant neighboring grain interactions via orientation and misorientation statistics Laurence Bodelot and Guruswami Ravichandran International Journal of Materials Research 2014 105:2, 117-129
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44492
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:25 Mar 2014 17:58
Last Modified:29 Sep 2016 23:16

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