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Title: 4-D XRD for strain in many grains using triangulation

Abstract

Determination of the strains in a polycrystalline materialusing 4-D XRD reveals sub-grain and grain-to-grain behavior as a functionof stress. Here 4-D XRD involves an experimental procedure usingpolychromatic micro-beam X-radiation (micro-Laue) to characterizepolycrystalline materials in spatial location as well as with increasingstress. The in-situ tensile loading experiment measured strain in a modelaluminum-sapphire metal matrix composite using the Advanced Light Source,Beam-line 7.3.3. Micro-Laue resolves individual grains in thepolycrystalline matrix. Results obtained from a list of grains sorted bycrystallographic orientation depict the strain states within and amongindividual grains. Locating the grain positions in the planeperpendicular to the incident beam is trivial. However, determining theexact location of grains within a 3-D space is challenging. Determiningthe depth of the grains within the matrix (along the beam direction)involved a triangulation method tracing individual rays that producespots on the CCD back to the point of origin. Triangulation wasexperimentally implemented by simulating a 3-D detector capturingmultiple diffraction images while increasing the camera to sampledistance. Hence by observing the intersection of rays from multiple spotsbelonging to the corresponding grain, depth is calculated. Depthresolution is a function of the number of images collected, grain to beamsize ratio, and the pixel resolution of the CCD. The 4DXRD methodprovides grain morphologies, strainmore » behavior of each grain, andinteractions of the matrix grains with each other and the centrallylocated single crystal fiber.« less

Authors:
; ;
Publication Date:
Research Org.:
COLLABORATION - Oklahoma StateU.
Sponsoring Org.:
USDOE
OSTI Identifier:
922825
Report Number(s):
LBNL-62844
Journal ID: ISSN 0885-7156; PODIE2; R&D Project: A580ES; BnR: KC0204016; TRN: US0801758
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Powder Diffraction; Journal Volume: 21; Journal Issue: 2; Related Information: Journal Publication Date: 2006
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADVANCED LIGHT SOURCE; CAMERAS; DIFFRACTION; MONOCRYSTALS; ORIENTATION; ORIGIN; RESOLUTION; STRAINS; X RADIATION; X-RAY DIFFRACTION; strain composite microdiffraction

Citation Formats

Bale, Hrishikesh A., Hanan, Jay C., and Tamura, Nobumichi. 4-D XRD for strain in many grains using triangulation. United States: N. p., 2006. Web. doi:10.1154/1.2219885.
Bale, Hrishikesh A., Hanan, Jay C., & Tamura, Nobumichi. 4-D XRD for strain in many grains using triangulation. United States. doi:10.1154/1.2219885.
Bale, Hrishikesh A., Hanan, Jay C., and Tamura, Nobumichi. Sun . "4-D XRD for strain in many grains using triangulation". United States. doi:10.1154/1.2219885. https://www.osti.gov/servlets/purl/922825.
@article{osti_922825,
title = {4-D XRD for strain in many grains using triangulation},
author = {Bale, Hrishikesh A. and Hanan, Jay C. and Tamura, Nobumichi},
abstractNote = {Determination of the strains in a polycrystalline materialusing 4-D XRD reveals sub-grain and grain-to-grain behavior as a functionof stress. Here 4-D XRD involves an experimental procedure usingpolychromatic micro-beam X-radiation (micro-Laue) to characterizepolycrystalline materials in spatial location as well as with increasingstress. The in-situ tensile loading experiment measured strain in a modelaluminum-sapphire metal matrix composite using the Advanced Light Source,Beam-line 7.3.3. Micro-Laue resolves individual grains in thepolycrystalline matrix. Results obtained from a list of grains sorted bycrystallographic orientation depict the strain states within and amongindividual grains. Locating the grain positions in the planeperpendicular to the incident beam is trivial. However, determining theexact location of grains within a 3-D space is challenging. Determiningthe depth of the grains within the matrix (along the beam direction)involved a triangulation method tracing individual rays that producespots on the CCD back to the point of origin. Triangulation wasexperimentally implemented by simulating a 3-D detector capturingmultiple diffraction images while increasing the camera to sampledistance. Hence by observing the intersection of rays from multiple spotsbelonging to the corresponding grain, depth is calculated. Depthresolution is a function of the number of images collected, grain to beamsize ratio, and the pixel resolution of the CCD. The 4DXRD methodprovides grain morphologies, strain behavior of each grain, andinteractions of the matrix grains with each other and the centrallylocated single crystal fiber.},
doi = {10.1154/1.2219885},
journal = {Powder Diffraction},
number = 2,
volume = 21,
place = {United States},
year = {Sun Dec 31 00:00:00 EST 2006},
month = {Sun Dec 31 00:00:00 EST 2006}
}
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