Direct imaging of short-range order and its impact on deformation in Ti-6Al

Zhang, Ruopeng; Zhao, Shiteng; Ophus, Colin; Deng, Yu; Vachhani, Shraddha J.; Ozdol, Burak; Traylor, Rachel; Bustillo, Karen C.; Morris, J. W.; Chrzan, Daryl C.; Asta, Mark; Minor, Andrew M.

doi:10.1126/sciadv.aax2799

Title: Direct imaging of short-range order and its impact on deformation in Ti-6Al

Abstract

Chemical short-range order (SRO) within a nominally single-phase solid solution is known to affect the mechanical properties of alloys. While SRO has been indirectly related to deformation, direct observation of the SRO domain structure, and its effects on deformation mechanisms at the nanoscale, has remained elusive. Here, we report the direct observation of SRO in relation to deformation using energy-filtered imaging in a transmission electron microscope (TEM). The diffraction contrast is enhanced by reducing the inelastically scattered electrons, revealing subnanometer SRO-enhanced domains. The destruction of these domains by dislocation planar slip is observed after ex situ and in situ TEM mechanical testing. These results confirm the impact of SRO in Ti-Al alloys on the scale of angstroms. The direct confirmation of SRO in relationship to dislocation plasticity in metals can provide insight into how the mechanical behavior of concentrated solid solutions by the material’s thermal history.

Authors:

^[1];

^[2]; Deng, Yu ^[3]; Vachhani, Shraddha J. ^[4]; Ozdol, Burak ^[2];

^[1];

^[2]; Morris, J. W. ^[5];

^[1];

^[1]

Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Nanjing Univ. (China)
Bruker Nano Surface, Minneapolis, MN (United States)
Univ. of California, Berkeley, CA (United States)

Publication Date:: Fri Dec 13 00:00:00 EST 2019

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); US Department of the Navy, Office of Naval Research (ONR)

OSTI Identifier:: 1591853

Grant/Contract Number:: AC02-05CH11231; N00014-16-1-2304

Resource Type:: Accepted Manuscript

Journal Name:: Science Advances

Additional Journal Information:: Journal Volume: 5; Journal Issue: 12; Journal ID: ISSN 2375-2548

Publisher:: AAAS

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Zhang, Ruopeng, Zhao, Shiteng, Ophus, Colin, Deng, Yu, Vachhani, Shraddha J., Ozdol, Burak, Traylor, Rachel, Bustillo, Karen C., Morris, J. W., Chrzan, Daryl C., Asta, Mark, and Minor, Andrew M. Direct imaging of short-range order and its impact on deformation in Ti-6Al.  United States: N. p., 2019. 
Web.  doi:10.1126/sciadv.aax2799.

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                    Zhang, Ruopeng, Zhao, Shiteng, Ophus, Colin, Deng, Yu, Vachhani, Shraddha J., Ozdol, Burak, Traylor, Rachel, Bustillo, Karen C., Morris, J. W., Chrzan, Daryl C., Asta, Mark, & Minor, Andrew M. Direct imaging of short-range order and its impact on deformation in Ti-6Al.  United States.  https://doi.org/10.1126/sciadv.aax2799

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                    Zhang, Ruopeng, Zhao, Shiteng, Ophus, Colin, Deng, Yu, Vachhani, Shraddha J., Ozdol, Burak, Traylor, Rachel, Bustillo, Karen C., Morris, J. W., Chrzan, Daryl C., Asta, Mark, and Minor, Andrew M. Fri .  
"Direct imaging of short-range order and its impact on deformation in Ti-6Al".  United States.  https://doi.org/10.1126/sciadv.aax2799.  https://www.osti.gov/servlets/purl/1591853.

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@article{osti_1591853,

  title        = {Direct imaging of short-range order and its impact on deformation in Ti-6Al},

  author       = {Zhang, Ruopeng and Zhao, Shiteng and Ophus, Colin and Deng, Yu and Vachhani, Shraddha J. and Ozdol, Burak and Traylor, Rachel and Bustillo, Karen C. and Morris, J. W. and Chrzan, Daryl C. and Asta, Mark and Minor, Andrew M.},

  abstractNote = {Chemical short-range order (SRO) within a nominally single-phase solid solution is known to affect the mechanical properties of alloys. While SRO has been indirectly related to deformation, direct observation of the SRO domain structure, and its effects on deformation mechanisms at the nanoscale, has remained elusive. Here, we report the direct observation of SRO in relation to deformation using energy-filtered imaging in a transmission electron microscope (TEM). The diffraction contrast is enhanced by reducing the inelastically scattered electrons, revealing subnanometer SRO-enhanced domains. The destruction of these domains by dislocation planar slip is observed after ex situ and in situ TEM mechanical testing. These results confirm the impact of SRO in Ti-Al alloys on the scale of angstroms. The direct confirmation of SRO in relationship to dislocation plasticity in metals can provide insight into how the mechanical behavior of concentrated solid solutions by the material’s thermal history.},

  doi          = {10.1126/sciadv.aax2799},

  journal      = {Science Advances},

  number       = 12,

  volume       = 5,

  place        = {United States},

  year         = {Fri Dec 13 00:00:00 EST 2019},

  month        = {Fri Dec 13 00:00:00 EST 2019}

}

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Title: Direct imaging of short-range order and its impact on deformation in Ti-6Al

Abstract

Citation Formats

Study of the nanostructure of Gum Metal using energy-filtered transmission electron microscopy journal, January 2009

Correcting nonlinear drift distortion of scanning probe and scanning transmission electron microscopies from image pairs with orthogonal scan directions journal, March 2016

Deformation and creep modeling in polycrystalline Ti–6Al alloys journal, September 2003

Observation and analysis of weak-fringing faults in Ti-6 wt% Al journal, March 2002

A new method for the detection of short-range order journal, September 1963

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Microstructural development in equiatomic multicomponent alloys journal, July 2004

Effects of Silicon Addition on Grain Boundary Segregation Behaviors and Mechanical Properties in α-Iron journal, March 1998

On the strengthening of titanium by aluminum journal, May 1973

Segregation and clustering of solutes at grain boundaries in Mg–rare earth solid solutions journal, October 2014

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Solute hardening of close-packed solid solutions journal, October 1958

On the strength of solid solution alloys journal, January 1954

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In situ nanobeam electron diffraction strain mapping of planar slip in stainless steel journal, March 2018

Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes journal, May 2004

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Diffraction contrast imaging using virtual apertures journal, August 2015

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The effect of aluminium on twinning in binary alpha-titanium journal, January 2016

Plastic behavior of titanium-aluminum alloys journal, February 1974

First-principles investigation of perfect and diffuse antiphase boundaries in HCP-based Ti-Al alloys journal, March 2002

Plastic deformation of single crystals of Ti 3 Al with D0 19 structure journal, May 1991

Observation and analysis of weak-fringing faults in Ti-6 wt% Al journal, March 2002

Precipitation Hardening journal, June 1969

Tunable stacking fault energies by tailoring local chemical order in CrCoNi medium-entropy alloys text, January 2018

First-Principles Investigation of Perfect and Diffuse Anti-Phase Boundaries in HCP-Based Ti-Al Alloys text, January 2003

Precipitation hardening journal, December 1985

On the origin of planar slip in f.c.c. alloys journal, August 1989

Grain-scale measurement of slip resistances in aluminum polycrystals using spherical nanoindentation journal, May 2015

TEM quantitative characterization of short-range order and its effects on the deformation micromechanims in a Ti-6Al-4V alloy journal, January 2017

Diffraction contrast imaging using virtual apertures journal, August 2015

Correcting nonlinear drift distortion of scanning probe and scanning transmission electron microscopies from image pairs with orthogonal scan directions journal, March 2016

Dislocation nucleation facilitated by atomic segregation journal, November 2017

Observation and analysis of weak-fringing faults in Ti-6 wt% Al journal, March 2002

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Quantitative Analysis of Short-Range Order Diffuse Scattering in Cu-27.5 at%Pd Alloy with Energy-Filtered Electron Diffraction journal, January 2000

Tunable stacking fault energies by tailoring local chemical order in CrCoNi medium-entropy alloys text, January 2018

Study of the nanostructure of Gum Metal using energy-filtered transmission electron microscopy
journal, January 2009

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journal, March 2016

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On the strengthening of titanium by aluminum
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Precipitation hardening in metals
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Microstructures and properties of high-entropy alloys
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Spherical nanoindentation stress–strain curves
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Deformation behavior of HCP Ti-Al alloy single crystals
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Grain-scale measurement of slip resistances in aluminum polycrystals using spherical nanoindentation
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Precipitation of the ordered α 2 phase in a near- α titanium alloy
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Dislocation nucleation facilitated by atomic segregation
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Dislocation locking versus easy glide in titanium and zirconium
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Diffraction contrast imaging using virtual apertures
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Chemical short-range orders and the induced structural transition in high-entropy alloys
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Plastic behavior of titanium-aluminum alloys
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First-principles investigation of perfect and diffuse antiphase boundaries in HCP-based Ti-Al alloys
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Plastic deformation of single crystals of Ti ₃ Al with D0 ₁₉ structure
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Observation and analysis of weak-fringing faults in Ti-6 wt% Al
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Precipitation Hardening
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Tunable stacking fault energies by tailoring local chemical order in CrCoNi medium-entropy alloys
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First-Principles Investigation of Perfect and Diffuse Anti-Phase Boundaries in HCP-Based Ti-Al Alloys
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Precipitation hardening
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On the origin of planar slip in f.c.c. alloys
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Grain-scale measurement of slip resistances in aluminum polycrystals using spherical nanoindentation
journal, May 2015

TEM quantitative characterization of short-range order and its effects on the deformation micromechanims in a Ti-6Al-4V alloy
journal, January 2017

Diffraction contrast imaging using virtual apertures
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Correcting nonlinear drift distortion of scanning probe and scanning transmission electron microscopies from image pairs with orthogonal scan directions
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Dislocation nucleation facilitated by atomic segregation
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Observation and analysis of weak-fringing faults in Ti-6 wt% Al
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Precipitation hardening in metals
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Quantitative Analysis of Short-Range Order Diffuse Scattering in Cu-27.5 at%Pd Alloy with Energy-Filtered Electron Diffraction
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Tunable stacking fault energies by tailoring local chemical order in CrCoNi medium-entropy alloys
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