In Situ Nanoindentation Studies on Detwinning and Work Hardening in Nanotwinned Monolithic Metals

Liu, Y.; Li, N.; Bufford, D.; Lee, J. H.; Wang, J.; Wang, H.; Zhang, X.

doi:10.1007/s11837-015-1518-1

Title: In Situ Nanoindentation Studies on Detwinning and Work Hardening in Nanotwinned Monolithic Metals

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Abstract

Certain nanotwinned (nt) metals have rare combinations of high mechanical strength and ductility. Here, we review recent in situ nanoindentation studies (using transmission electron microscopes) on the deformation mechanisms of nt face-centered cubic metals including Cu, Ni, and Al with a wide range of stacking fault energy (SFE). Moreover, in nt Cu with low-to-intermediate SFE, detwinning (accompanied by rapid twin boundary migration) occurs at ultralow stress. In Ni with relatively high SFE, coherent {111} twin boundaries lead to substantial work hardening. Twinned Al has abundant {112} incoherent twin boundaries, which induce significant work-hardening capability and plasticity in Al. Finally, twin boundaries in Al also migrate but at very high stresses. Furthermore, molecular dynamics simulations reveal the influence of SFE on deformation mechanisms in twinned metals.

Authors:

Liu, Y. ^[1]; Li, N. ^[2]; Bufford, D. ^[3]; Lee, J. H. ^[4]; Wang, J. ^[4]; Wang, H. ^[4]; Zhang, X. ^[4]

Texas A & M Univ., College Station, TX (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Texas A & M Univ., College Station, TX (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Texas A & M Univ., College Station, TX (United States)

Publication Date:: Tue Jul 14 00:00:00 EDT 2015

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1304707

Report Number(s):: LA-UR-15-23096
Journal ID: ISSN 1047-4838

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: Journal of The Minerals, Metals & Materials Society

Additional Journal Information:: Journal Volume: 68; Journal Issue: 1; Journal ID: ISSN 1047-4838

Publisher:: Springer

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; coherent and incoherent twin boundary; in situ nanoindentation; work hardening; detwinning

Citation Formats


                    Liu, Y., Li, N., Bufford, D., Lee, J. H., Wang, J., Wang, H., and Zhang, X. In Situ Nanoindentation Studies on Detwinning and Work Hardening in Nanotwinned Monolithic Metals.  United States: N. p., 2015. 
Web.  doi:10.1007/s11837-015-1518-1.

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                    Liu, Y., Li, N., Bufford, D., Lee, J. H., Wang, J., Wang, H., & Zhang, X. In Situ Nanoindentation Studies on Detwinning and Work Hardening in Nanotwinned Monolithic Metals.  United States.  https://doi.org/10.1007/s11837-015-1518-1

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                    Liu, Y., Li, N., Bufford, D., Lee, J. H., Wang, J., Wang, H., and Zhang, X. Tue .  
"In Situ Nanoindentation Studies on Detwinning and Work Hardening in Nanotwinned Monolithic Metals".  United States.  https://doi.org/10.1007/s11837-015-1518-1.  https://www.osti.gov/servlets/purl/1304707.

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@article{osti_1304707,

  title        = {In Situ Nanoindentation Studies on Detwinning and Work Hardening in Nanotwinned Monolithic Metals},

  author       = {Liu, Y. and Li, N. and Bufford, D. and Lee, J. H. and Wang, J. and Wang, H. and Zhang, X.},

  abstractNote = {Certain nanotwinned (nt) metals have rare combinations of high mechanical strength and ductility. Here, we review recent in situ nanoindentation studies (using transmission electron microscopes) on the deformation mechanisms of nt face-centered cubic metals including Cu, Ni, and Al with a wide range of stacking fault energy (SFE). Moreover, in nt Cu with low-to-intermediate SFE, detwinning (accompanied by rapid twin boundary migration) occurs at ultralow stress. In Ni with relatively high SFE, coherent {111} twin boundaries lead to substantial work hardening. Twinned Al has abundant {112} incoherent twin boundaries, which induce significant work-hardening capability and plasticity in Al. Finally, twin boundaries in Al also migrate but at very high stresses. Furthermore, molecular dynamics simulations reveal the influence of SFE on deformation mechanisms in twinned metals.},

  doi          = {10.1007/s11837-015-1518-1},

  journal      = {Journal of The Minerals, Metals & Materials Society},

  number       = 1,

  volume       = 68,

  place        = {United States},

  year         = {Tue Jul 14 00:00:00 EDT 2015},

  month        = {Tue Jul 14 00:00:00 EDT 2015}

}

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