skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Study of grain-level deformation and residual stresses in Ti-7Al under combined bending and tension using high energy diffraction microscopy (HEDM)

Abstract

In-situ high energy diffraction microscopy (HEDM) experiments are carried out to analyze the state of combined bending and tension in a Ti-7Al alloy under room temperature creep. Grain-level elastic strain tensors are evaluated from HEDM data. Atomistic calculations are used to predict elastic constants of Ti-7Al, to be used in determination of stress from strain. The stress gradient and residual stresses are successfully determined, which allows the demarcation between macro-/micro-level residual stresses. A cluster of three neighboring grains are identified that highlight the variation of mean and effective stress between grains. Crystallographic orientations and slip characteristics are analyzed for the selected grains. It is inferred that the interfaces between loaded grains with markedly different stress triaxiality and slip tendency are potential spots for material damage.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1336256
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Solids and Structures; Journal Volume: 94-95; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; High energy diffraction microscopy; Ti-7Al alloy; Stress gradient; Stress triaxiality; Slip tendency

Citation Formats

Chatterjee, K., Venkataraman, A., Garbaciak, T., Rotella, J., Sangid, M. D., Beaudoin, A. J., Kenesei, P., Park, J-S., and Pilchak, A. L. Study of grain-level deformation and residual stresses in Ti-7Al under combined bending and tension using high energy diffraction microscopy (HEDM). United States: N. p., 2016. Web. doi:10.1016/j.ijsolstr.2016.05.010.
Chatterjee, K., Venkataraman, A., Garbaciak, T., Rotella, J., Sangid, M. D., Beaudoin, A. J., Kenesei, P., Park, J-S., & Pilchak, A. L. Study of grain-level deformation and residual stresses in Ti-7Al under combined bending and tension using high energy diffraction microscopy (HEDM). United States. doi:10.1016/j.ijsolstr.2016.05.010.
Chatterjee, K., Venkataraman, A., Garbaciak, T., Rotella, J., Sangid, M. D., Beaudoin, A. J., Kenesei, P., Park, J-S., and Pilchak, A. L. Thu . "Study of grain-level deformation and residual stresses in Ti-7Al under combined bending and tension using high energy diffraction microscopy (HEDM)". United States. doi:10.1016/j.ijsolstr.2016.05.010.
@article{osti_1336256,
title = {Study of grain-level deformation and residual stresses in Ti-7Al under combined bending and tension using high energy diffraction microscopy (HEDM)},
author = {Chatterjee, K. and Venkataraman, A. and Garbaciak, T. and Rotella, J. and Sangid, M. D. and Beaudoin, A. J. and Kenesei, P. and Park, J-S. and Pilchak, A. L.},
abstractNote = {In-situ high energy diffraction microscopy (HEDM) experiments are carried out to analyze the state of combined bending and tension in a Ti-7Al alloy under room temperature creep. Grain-level elastic strain tensors are evaluated from HEDM data. Atomistic calculations are used to predict elastic constants of Ti-7Al, to be used in determination of stress from strain. The stress gradient and residual stresses are successfully determined, which allows the demarcation between macro-/micro-level residual stresses. A cluster of three neighboring grains are identified that highlight the variation of mean and effective stress between grains. Crystallographic orientations and slip characteristics are analyzed for the selected grains. It is inferred that the interfaces between loaded grains with markedly different stress triaxiality and slip tendency are potential spots for material damage.},
doi = {10.1016/j.ijsolstr.2016.05.010},
journal = {International Journal of Solids and Structures},
number = C,
volume = 94-95,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2016},
month = {Thu Sep 01 00:00:00 EDT 2016}
}