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Title: Understanding materials microstructure and behavior at the mesoscale

Abstract

Taking the mesoscale to mean length and time scales at which a material’s behavior is too complex to be understood by construction from the atomistic scale, we focus on three-dimensional characterization and modeling of mesoscale responses of polycrystals to thermal and mechanical loading. Both elastic and plastic internal structural responses are now accessible via high-energy x-ray probes. The combination of diffraction experiments and computed tomography, for example, is yielding new insights into how void formation correlates with microstructural features such as grain boundaries and higher-order junctions. The resulting large, combined data sets allow for validation of micromechanical and thermal simulations. As detectors improve in resolution, quantum efficiency, and speed of readout, data rates and data volumes present computational challenges. Spatial resolutions approach one micrometer, while data sets span a cubic millimeter. Examples are given of applications to tensile deformation of copper, grain growth in nickel and titanium, and fatigue cracks in superalloys.

Authors:
; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1349942
Resource Type:
Journal Article
Journal Name:
MRS Bulletin
Additional Journal Information:
Journal Volume: 40; Journal Issue: 11; Journal ID: ISSN 0883-7694
Publisher:
Materials Research Society
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE

Citation Formats

Rollett, A. D., Rohrer, G. S., and Suter, R. M. Understanding materials microstructure and behavior at the mesoscale. United States: N. p., 2015. Web. doi:10.1557/mrs.2015.262.
Rollett, A. D., Rohrer, G. S., & Suter, R. M. Understanding materials microstructure and behavior at the mesoscale. United States. doi:10.1557/mrs.2015.262.
Rollett, A. D., Rohrer, G. S., and Suter, R. M. Sun . "Understanding materials microstructure and behavior at the mesoscale". United States. doi:10.1557/mrs.2015.262.
@article{osti_1349942,
title = {Understanding materials microstructure and behavior at the mesoscale},
author = {Rollett, A. D. and Rohrer, G. S. and Suter, R. M.},
abstractNote = {Taking the mesoscale to mean length and time scales at which a material’s behavior is too complex to be understood by construction from the atomistic scale, we focus on three-dimensional characterization and modeling of mesoscale responses of polycrystals to thermal and mechanical loading. Both elastic and plastic internal structural responses are now accessible via high-energy x-ray probes. The combination of diffraction experiments and computed tomography, for example, is yielding new insights into how void formation correlates with microstructural features such as grain boundaries and higher-order junctions. The resulting large, combined data sets allow for validation of micromechanical and thermal simulations. As detectors improve in resolution, quantum efficiency, and speed of readout, data rates and data volumes present computational challenges. Spatial resolutions approach one micrometer, while data sets span a cubic millimeter. Examples are given of applications to tensile deformation of copper, grain growth in nickel and titanium, and fatigue cracks in superalloys.},
doi = {10.1557/mrs.2015.262},
journal = {MRS Bulletin},
issn = {0883-7694},
number = 11,
volume = 40,
place = {United States},
year = {2015},
month = {11}
}

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