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In situ measurement of lattice strain using synchrotron radiation and a conical slit system

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Title: In situ measurement of lattice strain using synchrotron radiation and a conical slit system
Author(s): Obstalecki, Mark
Advisor(s): Beaudoin, Armand J.
Department / Program: Mechanical Sci & Engineering
Discipline: Mechanical Engineering
Degree Granting Institution: University of Illinois at Urbana-Champaign
Degree: M.S.
Genre: Thesis
Subject(s): Conical Slit In situ Sychrotron X-ray Advanced Photon Source Triaxiality Lattice Strain Error Sources AA2195 Aluminum-lithium
Abstract: An experiment utilizing synchrotron radiation to measure lattice strain components from an aluminum-lithium sample during tensile loading is presented in detail. The conical slit system at Argonne National Laboratory’s Advanced Photon Source is utilized to isolate a single grain with an orientation of interest from the highly textured alloy. A total of 39 reflections contribute to the calculation of the strain tensor for each load step. Trends were realized in all six independent components of stain, and reveal an elevated initial triaxiality which approached the expected value for tensile loading of an isotropic material as the sample was loaded. Potential error sources are discussed in relation to strain measurements and considerations when using the conical slit system are presented.
Issue Date: 2011-08-25
Rights Information: Copyright 2011 Mark Obstalecki
Date Available in IDEALS: 2011-08-25
Date Deposited: 2011-08

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