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

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1328442
Grant/Contract Number:
AC02-06CH11357
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
International Journal of Solids and Structures
Additional Journal Information:
Journal Volume: 94-95; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-03 21:15:43; Journal ID: ISSN 0020-7683
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

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.. 2016. "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_1328442,
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 = {},
doi = {10.1016/j.ijsolstr.2016.05.010},
journal = {International Journal of Solids and Structures},
number = C,
volume = 94-95,
place = {United States},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.ijsolstr.2016.05.010

Citation Metrics:
Cited by: 5works
Citation information provided by
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  • 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 themore » 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.« less
  • This research is dedicated to the experimental investigation of the residual stress relaxation in girth-welded pipes due to quasi-static bending loads. Ferritic-pearlitic steel pipes are welded with two passes, resulting in a characteristic residual stress state with high tensile residual stresses at the weld root. Also, four-point bending is applied to generate axial load stress causing changes in the residual stress state. These are determined both on the outer and inner surfaces of the pipes, as well as in the pipe wall, using X-ray and neutron diffraction. Focusing on the effect of tensile load stress, it is revealed that notmore » only the tensile residual stresses are reduced due to exceeding the yield stress, but also the compressive residual stresses for equilibrium reasons. Furthermore, residual stress relaxation occurs both parallel and perpendicular to the applied load stress.« less
  • Shot-peening is a surface treatment for metals largely used to increase their fatigue resistance. According to some authors, shot-peening gives rise to residual compressive stress in the surface layers of the metals, which could explain the fatigue resistance improvement. This is quite reasonable as this compressive stress reduces the net effect of the tensile component of the applied cyclic loading. This effect increases the fatigue resistance. There is however another point of view on this subject that ascribes less importance to the residual compressive stress influence. It is based upon work which shows that cyclic loading promotes residual surface stressmore » modification by a mechanism of local plastic microdeformation. Since in this case a surface stress decrease would occur, these papers report that in the early applied cycles, residual stress could not have any influence on the ultimate fatigue behavior of the metal. This point of view highlights the need for a study to clarify the influence of plastic deformation upon relaxation as a function of variation of the initial surface residual stress. The aim of the present work is to provide a better understanding of these questions. Steel samples of 5Cr-0.5Mo (weight percent) were submitted to shot-penning in order to build up compressive surface residual stress. The samples were plastically deformed by uniaxial tensile test until complete fracture. Longitudinal and transverse residual stresses were measured before and during the test.« less