Direct synchrotron x-ray measurements of local strain fields in elastically and plastically bent metallic glasses

Wu, Yuan; Stoica, Alexandru Dan; Ren, Yang; Ma, Dong; Gao, Yanfei F.; Bei, Hongbin

doi:10.1016/j.intermet.2015.08.010

Title: Direct synchrotron x-ray measurements of local strain fields in elastically and plastically bent metallic glasses

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Abstract

In situ high-energy synchrotron X-ray diffraction was conducted on elastically and plastically bent bulk metallic glass (BMG) thin plates, from which distinct local elastic strain fields were mapped spatially. These directly measured residual strain fields can be nicely interpreted by our stress analysis, and also validate a previously proposed indirect residual-stress-measurement method by relating nanoindentation hardness to residual stresses. Local shear strain variations on the cross sections of these thin plates were found in the plastically bent BMG, which however cannot be determined from the indirect indentation method. As a result, this study has important implications in designing and manipulating internal strain fields in BMGs for the purpose of ductility enhancement.

Authors:

Wu, Yuan ^[1]; Stoica, Alexandru Dan ^[2]; Ren, Yang ^[3]; Ma, Dong ^[2]; Gao, Yanfei F. ^[4]; Bei, Hongbin ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Science and Technology Beijing, Beijing (China); Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

Publication Date:: Thu Sep 03 00:00:00 EDT 2015

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1238736

Alternate Identifier(s):: OSTI ID: 1245020; OSTI ID: 1250590

Grant/Contract Number:: AC05-00OR22725; AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Intermetallics

Additional Journal Information:: Journal Volume: 67; Journal Issue: C; Journal ID: ISSN 0966-9795

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; 36 MATERIALS SCIENCE; bulk metallic glass; synchrotron x-ray; residual stress; mechanical testing; metallic glasses

Citation Formats


                    Wu, Yuan, Stoica, Alexandru Dan, Ren, Yang, Ma, Dong, Gao, Yanfei F., and Bei, Hongbin. Direct synchrotron x-ray measurements of local strain fields in elastically and plastically bent metallic glasses.  United States: N. p., 2015. 
Web.  doi:10.1016/j.intermet.2015.08.010.

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                    Wu, Yuan, Stoica, Alexandru Dan, Ren, Yang, Ma, Dong, Gao, Yanfei F., & Bei, Hongbin. Direct synchrotron x-ray measurements of local strain fields in elastically and plastically bent metallic glasses.  United States.  https://doi.org/10.1016/j.intermet.2015.08.010

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                    Wu, Yuan, Stoica, Alexandru Dan, Ren, Yang, Ma, Dong, Gao, Yanfei F., and Bei, Hongbin. Thu .  
"Direct synchrotron x-ray measurements of local strain fields in elastically and plastically bent metallic glasses".  United States.  https://doi.org/10.1016/j.intermet.2015.08.010.  https://www.osti.gov/servlets/purl/1238736.

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@article{osti_1238736,

  title        = {Direct synchrotron x-ray measurements of local strain fields in elastically and plastically bent metallic glasses},

  author       = {Wu, Yuan and Stoica, Alexandru Dan and Ren, Yang and Ma, Dong and Gao, Yanfei F. and Bei, Hongbin},

  abstractNote = {In situ high-energy synchrotron X-ray diffraction was conducted on elastically and plastically bent bulk metallic glass (BMG) thin plates, from which distinct local elastic strain fields were mapped spatially. These directly measured residual strain fields can be nicely interpreted by our stress analysis, and also validate a previously proposed indirect residual-stress-measurement method by relating nanoindentation hardness to residual stresses. Local shear strain variations on the cross sections of these thin plates were found in the plastically bent BMG, which however cannot be determined from the indirect indentation method. As a result, this study has important implications in designing and manipulating internal strain fields in BMGs for the purpose of ductility enhancement.},

  doi          = {10.1016/j.intermet.2015.08.010},

  journal      = {Intermetallics},

  number       = C,

  volume       = 67,

  place        = {United States},

  year         = {Thu Sep 03 00:00:00 EDT 2015},

  month        = {Thu Sep 03 00:00:00 EDT 2015}

}

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