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Title: In-situ single-grain peak profile measurements on Ti-7Al during tensile deformation.

Abstract

High-energy three-dimensional X-ray diffraction with medium and high reciprocal space resolution was applied to study in situ tensile deformation of Ti-7Al specimens. Samples with planar and random dislocation microstructures were prepared and characterized by electron microscopy. Stress tensors of individual grains were obtained at several loads up to 2% deformation. The stress tensors were found to rotate, and resolved shear stresses were calculated. High-resolution reciprocal space maps of selected grains were recorded. Azimuthal and radial distributions were visualized and discussed in terms of idealized dislocation structures. Heterogeneous grain rotations were observed for the planar microstructure and found to be consistent with activation of the highest stressed basal slip system. Intra-granular strain gradients were detected in excess of the intrinsic radial dislocation peak broadening. The potential of combining the applied techniques with modeling to obtain multiple length-scale information during deformation of bulk specimens is discussed.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Federal Aviation Administration; US Department of the Navy, Office of Naval Research (ONR)
OSTI Identifier:
967946
Report Number(s):
ANL/XSD/JA-64602
Journal ID: ISSN 0921-5093; MSAPE3; TRN: US200924%%57
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Mater. Sci. Eng. A
Additional Journal Information:
Journal Volume: 524; Journal Issue: 1-2 ; Oct. 25, 2009; Journal ID: ISSN 0921-5093
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; TITANIUM BASE ALLOYS; ALUMINIUM ALLOYS; DEFORMATION; DISLOCATIONS; MICROSTRUCTURE; SHEAR; STRAINS; STRESSES; X-RAY DIFFRACTION; MATHEMATICAL MODELS

Citation Formats

Lienert, U, Brandes, M C, Bernier, J V, Weiss, J, Shastri, S D, Mills, M J, Miller, M P, US Naval Research Lab., LLNL,, Mechanical Solutions, Inc., Ohio State Univ., and Cornell Univ. In-situ single-grain peak profile measurements on Ti-7Al during tensile deformation.. United States: N. p., 2009. Web. doi:10.1016/j.msea.2009.06.047.
Lienert, U, Brandes, M C, Bernier, J V, Weiss, J, Shastri, S D, Mills, M J, Miller, M P, US Naval Research Lab., LLNL,, Mechanical Solutions, Inc., Ohio State Univ., & Cornell Univ. In-situ single-grain peak profile measurements on Ti-7Al during tensile deformation.. United States. doi:10.1016/j.msea.2009.06.047.
Lienert, U, Brandes, M C, Bernier, J V, Weiss, J, Shastri, S D, Mills, M J, Miller, M P, US Naval Research Lab., LLNL,, Mechanical Solutions, Inc., Ohio State Univ., and Cornell Univ. Sun . "In-situ single-grain peak profile measurements on Ti-7Al during tensile deformation.". United States. doi:10.1016/j.msea.2009.06.047.
@article{osti_967946,
title = {In-situ single-grain peak profile measurements on Ti-7Al during tensile deformation.},
author = {Lienert, U and Brandes, M C and Bernier, J V and Weiss, J and Shastri, S D and Mills, M J and Miller, M P and US Naval Research Lab. and LLNL, and Mechanical Solutions, Inc. and Ohio State Univ. and Cornell Univ.},
abstractNote = {High-energy three-dimensional X-ray diffraction with medium and high reciprocal space resolution was applied to study in situ tensile deformation of Ti-7Al specimens. Samples with planar and random dislocation microstructures were prepared and characterized by electron microscopy. Stress tensors of individual grains were obtained at several loads up to 2% deformation. The stress tensors were found to rotate, and resolved shear stresses were calculated. High-resolution reciprocal space maps of selected grains were recorded. Azimuthal and radial distributions were visualized and discussed in terms of idealized dislocation structures. Heterogeneous grain rotations were observed for the planar microstructure and found to be consistent with activation of the highest stressed basal slip system. Intra-granular strain gradients were detected in excess of the intrinsic radial dislocation peak broadening. The potential of combining the applied techniques with modeling to obtain multiple length-scale information during deformation of bulk specimens is discussed.},
doi = {10.1016/j.msea.2009.06.047},
journal = {Mater. Sci. Eng. A},
issn = {0921-5093},
number = 1-2 ; Oct. 25, 2009,
volume = 524,
place = {United States},
year = {2009},
month = {10}
}