Instability analysis and free volume simulations of shear band directions and arrangements in notched metallic glasses

Li, Weidong; Gao, Yanfei; Bei, Hongbin

doi:10.1038/srep34878

Title: Instability analysis and free volume simulations of shear band directions and arrangements in notched metallic glasses

Abstract

As a commonly used method to enhance the ductility in bulk metallic glasses (BMGs), the introduction of geometric constraints blocks and confines the propagation of the shear bands, reduces the degree of plastic strain on each shear band so that the catastrophic failure is prevented or delayed, and promotes the formation of multiple shear bands. The clustering of multiple shear bands near notches is often interpreted as the reason for improved ductility. Experimental works on the shear band arrangements in notched metallic glasses have been extensively carried out, but a systematic theoretical study is lacking. Using instability theory that predicts the onset of strain localization and the free-volume- based nite element simulations that predict the evolution of shear bands, this work reveals various categories of shear band arrangements in double edge notched BMGs with respect to the mode mixity of the applied stress fields. In conclusion, a mechanistic explanation is thus provided to a number of related experiments and especially the correlation between various types of shear bands and the stress state.

Authors:

Li, Weidong ^[1]; Gao, Yanfei ^[2]; Bei, Hongbin ^[3]

Univ. of Tennessee, Knoxville, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Mon Oct 10 00:00:00 EDT 2016

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1329121

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Scientific Reports

Additional Journal Information:: Journal Volume: 6; Journal ID: ISSN 2045-2322

Publisher:: Nature Publishing Group

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; condensed-matter physics; glasses

Citation Formats


                    Li, Weidong, Gao, Yanfei, and Bei, Hongbin. Instability analysis and free volume simulations of shear band directions and arrangements in notched metallic glasses.  United States: N. p., 2016. 
Web.  doi:10.1038/srep34878.

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                    Li, Weidong, Gao, Yanfei, & Bei, Hongbin. Instability analysis and free volume simulations of shear band directions and arrangements in notched metallic glasses.  United States.  https://doi.org/10.1038/srep34878

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                    Li, Weidong, Gao, Yanfei, and Bei, Hongbin. Mon .  
"Instability analysis and free volume simulations of shear band directions and arrangements in notched metallic glasses".  United States.  https://doi.org/10.1038/srep34878.  https://www.osti.gov/servlets/purl/1329121.

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@article{osti_1329121,

  title        = {Instability analysis and free volume simulations of shear band directions and arrangements in notched metallic glasses},

  author       = {Li, Weidong and Gao, Yanfei and Bei, Hongbin},

  abstractNote = {As a commonly used method to enhance the ductility in bulk metallic glasses (BMGs), the introduction of geometric constraints blocks and confines the propagation of the shear bands, reduces the degree of plastic strain on each shear band so that the catastrophic failure is prevented or delayed, and promotes the formation of multiple shear bands. The clustering of multiple shear bands near notches is often interpreted as the reason for improved ductility. Experimental works on the shear band arrangements in notched metallic glasses have been extensively carried out, but a systematic theoretical study is lacking. Using instability theory that predicts the onset of strain localization and the free-volume- based nite element simulations that predict the evolution of shear bands, this work reveals various categories of shear band arrangements in double edge notched BMGs with respect to the mode mixity of the applied stress fields. In conclusion, a mechanistic explanation is thus provided to a number of related experiments and especially the correlation between various types of shear bands and the stress state.},

  doi          = {10.1038/srep34878},

  journal      = {Scientific Reports},

  number       = ,

  volume       = 6,

  place        = {United States},

  year         = {Mon Oct 10 00:00:00 EDT 2016},

  month        = {Mon Oct 10 00:00:00 EDT 2016}

}

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Steif, P. S.; Spaepen, F.; Hutchinson, J. W.
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Conditions for the localization of deformation in pressure-sensitive dilatant materials
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Rudnicki, J. W.; Rice, J. R.
Journal of the Mechanics and Physics of Solids, Vol. 23, Issue 6
DOI: 10.1016/0022-5096(75)90001-0

On the mechanism and the length scales involved in the ductile fracture of a bulk metallic glass
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Tandaiya, Parag; Narasimhan, R.; Ramamurty, U.
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Cavitation in brittle metallic glasses – Effects of stress state and distributed weak zones
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Singh, I.; Guo, T. F.; Narasimhan, R.
International Journal of Solids and Structures, Vol. 51, Issue 25-26
DOI: 10.1016/j.ijsolstr.2014.09.005

Mechanical and Structural Investigation of Porous Bulk Metallic Glasses
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Sarac, Baran; Sopu, Daniel; Park, Eunmi
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Works referencing / citing this record:

Dynamic interaction of multiple shear bands
journal, October 2018

Giarola, Diana; Capuani, Domenico; Bigoni, Davide
Scientific Reports, Vol. 8, Issue 1
DOI: 10.1038/s41598-018-34322-w

Remarks on the Notch Sensitivity of Bulk Metallic Glasses
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Zhao, Yanchun; Gao, Yanfei
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Giarola, Diana; Capuani, Domenico; Bigoni, Davide
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Similar Records

Title: Instability analysis and free volume simulations of shear band directions and arrangements in notched metallic glasses

Abstract

Citation Formats

Cavitation in brittle metallic glasses – Effects of stress state and distributed weak zones journal, December 2014

Thin-film metallic glasses for substrate fatigue-property improvements journal, June 2014

Initiation and propagation of shear bands in Zr-based bulk metallic glass under quasi-static and dynamic shear loadings journal, October 2005

On the correlation between microscopic structural heterogeneity and embrittlement behavior in metallic glasses journal, October 2015

Mixed mode (I and II) crack tip fields in bulk metallic glasses journal, November 2009

Deformation-induced spatiotemporal fluctuation, evolution and localization of strain fields in a bulk metallic glass journal, August 2015

Origin of anomalous inverse notch effect in bulk metallic glasses journal, November 2015

Plastic deformability of metallic glass by artificial macroscopic notches journal, September 2010

Is the compression of tapered micro- and nanopillar samples a legitimate technique for the identification of deformation mode change in metallic glasses? journal, May 2012

Mechanical and Structural Investigation of Porous Bulk Metallic Glasses journal, June 2015

Intergranular strain evolution near fatigue crack tips in polycrystalline metals journal, November 2011

Notch strengthening or weakening governed by transition of shear failure to normal mode fracture journal, May 2015

Designing tensile ductility in metallic glasses journal, July 2013

Structural heterogeneity induced plasticity in bulk metallic glasses: From well-relaxed fragile glass to metal-like behavior journal, October 2013

Comparison of compressive deformation and fracture behaviors of Zr- and Ti-based metallic glasses with notches journal, March 2011

Conditions for the localization of deformation in pressure-sensitive dilatant materials journal, December 1975

On the shear-band direction in metallic glasses journal, June 2011

Strain localization in amorphous metals journal, February 1982

Cavitation in materials with distributed weak zones: Implications on the origin of brittle fracture in metallic glasses journal, April 2013

On the mechanism and the length scales involved in the ductile fracture of a bulk metallic glass journal, March 2013

Interface Constraints on Shear Band Patterns in Bonded Metallic Glass Films Under Microindentation journal, January 2012

Controlled normal/shear loading and shear fracture in bulk metallic glasses journal, October 2009

Flow serration in a Zr-based bulk metallic glass in compression at low strain rates journal, June 2008

A microscopic mechanism for steady state inhomogeneous flow in metallic glasses journal, April 1977

Shear fracture of bulk metallic glasses with controlled applied normal stresses journal, July 2008

Notch-sensitivity and shear bands in brittle matrix composites journal, September 1994

Numerical study of mixed-mode fracture in concrete journal, January 2002

Metallic glasses: Notch-insensitive materials journal, May 2012

An implicit finite element method for simulating inhomogeneous deformation and shear bands of amorphous alloys based on the free-volume model journal, October 2006

Mean stress effects on flow localization and failure in a bulk metallic glass journal, August 2001

Densification and Strain Hardening of a Metallic Glass under Tension at Room Temperature journal, September 2013

Strain localization in amorphous metals journal, February 1982

Conditions for the localization of deformation in pressure-sensitive dilatant materials journal, December 1975

On the mechanism and the length scales involved in the ductile fracture of a bulk metallic glass journal, March 2013

Cavitation in brittle metallic glasses – Effects of stress state and distributed weak zones journal, December 2014

Mechanical and Structural Investigation of Porous Bulk Metallic Glasses journal, June 2015

Dynamic interaction of multiple shear bands journal, October 2018

Remarks on the Notch Sensitivity of Bulk Metallic Glasses journal, December 2019

Dynamic interaction of multiple shear bands journal, October 2018

Cavitation in brittle metallic glasses – Effects of stress state and distributed weak zones
journal, December 2014

Thin-film metallic glasses for substrate fatigue-property improvements
journal, June 2014

Initiation and propagation of shear bands in Zr-based bulk metallic glass under quasi-static and dynamic shear loadings
journal, October 2005

On the correlation between microscopic structural heterogeneity and embrittlement behavior in metallic glasses
journal, October 2015

Mixed mode (I and II) crack tip fields in bulk metallic glasses
journal, November 2009

Deformation-induced spatiotemporal fluctuation, evolution and localization of strain fields in a bulk metallic glass
journal, August 2015

Origin of anomalous inverse notch effect in bulk metallic glasses
journal, November 2015

Plastic deformability of metallic glass by artificial macroscopic notches
journal, September 2010

Is the compression of tapered micro- and nanopillar samples a legitimate technique for the identification of deformation mode change in metallic glasses?
journal, May 2012

Mechanical and Structural Investigation of Porous Bulk Metallic Glasses
journal, June 2015

Intergranular strain evolution near fatigue crack tips in polycrystalline metals
journal, November 2011

Notch strengthening or weakening governed by transition of shear failure to normal mode fracture
journal, May 2015

Designing tensile ductility in metallic glasses
journal, July 2013

Structural heterogeneity induced plasticity in bulk metallic glasses: From well-relaxed fragile glass to metal-like behavior
journal, October 2013

Comparison of compressive deformation and fracture behaviors of Zr- and Ti-based metallic glasses with notches
journal, March 2011

Conditions for the localization of deformation in pressure-sensitive dilatant materials
journal, December 1975

On the shear-band direction in metallic glasses
journal, June 2011

Strain localization in amorphous metals
journal, February 1982

Cavitation in materials with distributed weak zones: Implications on the origin of brittle fracture in metallic glasses
journal, April 2013

On the mechanism and the length scales involved in the ductile fracture of a bulk metallic glass
journal, March 2013

Interface Constraints on Shear Band Patterns in Bonded Metallic Glass Films Under Microindentation
journal, January 2012

Controlled normal/shear loading and shear fracture in bulk metallic glasses
journal, October 2009

Flow serration in a Zr-based bulk metallic glass in compression at low strain rates
journal, June 2008

A microscopic mechanism for steady state inhomogeneous flow in metallic glasses
journal, April 1977

Shear fracture of bulk metallic glasses with controlled applied normal stresses
journal, July 2008

Notch-sensitivity and shear bands in brittle matrix composites
journal, September 1994

Numerical study of mixed-mode fracture in concrete
journal, January 2002

Metallic glasses: Notch-insensitive materials
journal, May 2012

An implicit finite element method for simulating inhomogeneous deformation and shear bands of amorphous alloys based on the free-volume model
journal, October 2006

Mean stress effects on flow localization and failure in a bulk metallic glass
journal, August 2001

Densification and Strain Hardening of a Metallic Glass under Tension at Room Temperature
journal, September 2013

Strain localization in amorphous metals
journal, February 1982

Conditions for the localization of deformation in pressure-sensitive dilatant materials
journal, December 1975

On the mechanism and the length scales involved in the ductile fracture of a bulk metallic glass
journal, March 2013

Cavitation in brittle metallic glasses – Effects of stress state and distributed weak zones
journal, December 2014

Mechanical and Structural Investigation of Porous Bulk Metallic Glasses
journal, June 2015

Dynamic interaction of multiple shear bands
journal, October 2018

Remarks on the Notch Sensitivity of Bulk Metallic Glasses
journal, December 2019

Dynamic interaction of multiple shear bands
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