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Title: Investigation of the shear response and geometrically necessary dislocation densities in shear localization in high-purity titanium

Abstract

The influence of microstructural anisotropy on shear response of high-purity titanium was studied using the compact forced-simple-shear specimen (CFSS) loaded under quasi-static loading conditions. Post-mortem characterization reveals significant difference in shear response of different directions in the same material due to material crystallographic texture anisotropy. Shear bands are narrower in specimens in which the shear zone is aligned along the direction with a strong {0001} basal texture. Twinning was identified as an active mechanism to accommodate strains in the shear region in both orientations. This paper confirms the applicability of the CFSS design for the investigation of differences in the shear response of materials as a function of process-induced crystallographic texture. A detailed, systematic approach to quantifying shear band evolution by evaluating geometrically necessary dislocations (GND) associated with crystallographic anisotropy is presented. Finally, the results show that: i) line average GND density profiles, for Ti samples that possess a uniform equiaxed-grain structure, but with strong crystallographic anisotropy, exhibit significant differences in GND density close to the shear band center; ii) GND profiles decrease steadily away from the shear band as the plastic strain diminishes, in agreement with Ashby's theory of work hardening, where the higher GND density in the through-thicknessmore » (TT) orientation is a result of restricted < a > type slip in the shear band compared with in-plane (IP) samples; iii) the anisotropy in deformation response is derived from initial crystallographic texture of the materials, where GND density of < a > GNDs are higher adjacent to the shear band in the through-thickness sample oriented away from easy slip, but the density of < c+a > type GNDs are very similar in these two samples; and iv) the increase in grain average GND density was determined to have strong correlation to an increase in the Euler Φ angle of the grain average orientation, indicating an increased misorientation angle evolution.« less

Authors:
ORCiD logo [1];  [2];  [1];  [2];  [2]; ORCiD logo [1]
  1. Univ. of California, San Diego, CA (United States). Dept. of NanoEngineering
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOD
OSTI Identifier:
1360700
Alternate Identifier(s):
OSTI ID: 1416626
Report Number(s):
LA-UR-16-22158
Journal ID: ISSN 0749-6419
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Plasticity
Additional Journal Information:
Journal Volume: 92; Journal ID: ISSN 0749-6419
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Shear banding; Geometrically necessary dislocations; CFSS sample; Crystallographic anisotropy

Citation Formats

Zhu, Chaoyi, Livescu, Veronica, Harrington, Tyler, Dippo, Olivia, Gray, George T., and Vecchio, Kenneth S. Investigation of the shear response and geometrically necessary dislocation densities in shear localization in high-purity titanium. United States: N. p., 2017. Web. doi:10.1016/j.ijplas.2017.03.009.
Zhu, Chaoyi, Livescu, Veronica, Harrington, Tyler, Dippo, Olivia, Gray, George T., & Vecchio, Kenneth S. Investigation of the shear response and geometrically necessary dislocation densities in shear localization in high-purity titanium. United States. https://doi.org/10.1016/j.ijplas.2017.03.009
Zhu, Chaoyi, Livescu, Veronica, Harrington, Tyler, Dippo, Olivia, Gray, George T., and Vecchio, Kenneth S. Fri . "Investigation of the shear response and geometrically necessary dislocation densities in shear localization in high-purity titanium". United States. https://doi.org/10.1016/j.ijplas.2017.03.009. https://www.osti.gov/servlets/purl/1360700.
@article{osti_1360700,
title = {Investigation of the shear response and geometrically necessary dislocation densities in shear localization in high-purity titanium},
author = {Zhu, Chaoyi and Livescu, Veronica and Harrington, Tyler and Dippo, Olivia and Gray, George T. and Vecchio, Kenneth S.},
abstractNote = {The influence of microstructural anisotropy on shear response of high-purity titanium was studied using the compact forced-simple-shear specimen (CFSS) loaded under quasi-static loading conditions. Post-mortem characterization reveals significant difference in shear response of different directions in the same material due to material crystallographic texture anisotropy. Shear bands are narrower in specimens in which the shear zone is aligned along the direction with a strong {0001} basal texture. Twinning was identified as an active mechanism to accommodate strains in the shear region in both orientations. This paper confirms the applicability of the CFSS design for the investigation of differences in the shear response of materials as a function of process-induced crystallographic texture. A detailed, systematic approach to quantifying shear band evolution by evaluating geometrically necessary dislocations (GND) associated with crystallographic anisotropy is presented. Finally, the results show that: i) line average GND density profiles, for Ti samples that possess a uniform equiaxed-grain structure, but with strong crystallographic anisotropy, exhibit significant differences in GND density close to the shear band center; ii) GND profiles decrease steadily away from the shear band as the plastic strain diminishes, in agreement with Ashby's theory of work hardening, where the higher GND density in the through-thickness (TT) orientation is a result of restricted < a > type slip in the shear band compared with in-plane (IP) samples; iii) the anisotropy in deformation response is derived from initial crystallographic texture of the materials, where GND density of < a > GNDs are higher adjacent to the shear band in the through-thickness sample oriented away from easy slip, but the density of < c+a > type GNDs are very similar in these two samples; and iv) the increase in grain average GND density was determined to have strong correlation to an increase in the Euler Φ angle of the grain average orientation, indicating an increased misorientation angle evolution.},
doi = {10.1016/j.ijplas.2017.03.009},
journal = {International Journal of Plasticity},
number = ,
volume = 92,
place = {United States},
year = {Fri Mar 31 00:00:00 EDT 2017},
month = {Fri Mar 31 00:00:00 EDT 2017}
}

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Works referenced in this record:

The process of shear band formation in plane strain compression of fcc metals: Effects of crystallographic texture
journal, March 1994


The deformation of plastically non-homogeneous materials
journal, February 1970

  • Ashby, M. F.
  • The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics, Vol. 21, Issue 170
  • DOI: 10.1080/14786437008238426

Texture Analysis with MTEX – Free and Open Source Software Toolbox
journal, February 2010


Characteristics and microstructure in the evolution of shear localization in Ti-6A1-4V alloy
journal, March 1994


The effect of crystal orientation on the indentation response of commercially pure titanium: experiments and simulations
journal, November 2009

  • Britton, T. B.; Liang, H.; Dunne, F. P. E.
  • Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 466, Issue 2115
  • DOI: 10.1098/rspa.2009.0455

Orientation gradients and geometrically necessary dislocations in ultrafine grained dual-phase steels studied by 2D and 3D EBSD
journal, April 2010

  • Calcagnotto, Marion; Ponge, Dirk; Demir, Eralp
  • Materials Science and Engineering: A, Vol. 527, Issue 10-11
  • DOI: 10.1016/j.msea.2010.01.004

Unstable shear failure in a 7075 aluminum alloy
journal, April 1977


The rate-dependent deformation and localization of fully dense and porous Ti-6Al-4V
journal, July 1997


Quantification of dislocation structure heterogeneity in deformed polycrystals by EBSD
journal, February 2012

  • Field, D. P.; Merriman, C. C.; Allain-Bonasso, N.
  • Modelling and Simulation in Materials Science and Engineering, Vol. 20, Issue 2
  • DOI: 10.1088/0965-0393/20/2/024007

Core structure of a screw dislocation in Ti from density functional theory and classical potentials
journal, February 2012


Anisotropy in the plastic flow properties of single-crystal α titanium determined from micro-cantilever beams
journal, November 2009


Compact forced simple-shear sample for studying shear localization in materials
journal, January 2016


Representation of orientation and disorientation data for cubic, hexagonal, tetragonal and orthorhombic crystals
journal, November 1991

  • Heinz, A.; Neumann, P.
  • Acta Crystallographica Section A Foundations of Crystallography, Vol. 47, Issue 6
  • DOI: 10.1107/S0108767391006864

Stress-state dependence of slip in Titanium-6Al-4V and other H.C.P. metals
journal, June 1981


Through thickness dynamic impact response in textured Ti–6Al–4V plates
journal, January 2002

  • Kad, Bimal K.; Schoenfeld, Scott E.; Burkins, Matthew S.
  • Materials Science and Engineering: A, Vol. 322, Issue 1-2
  • DOI: 10.1016/S0921-5093(01)01135-2

Flow Instabilities and fracture in Ti-6Al-4V deformed in compression at 298 K to 673 K
journal, October 1994

  • Kailas, Satish V.; Prasad, Y. V. R. K.; Biswas, S. K.
  • Metallurgical and Materials Transactions A, Vol. 25, Issue 10
  • DOI: 10.1007/BF02652318

Influence of initial texture on the microstructural instabilities during compression of commercial α-Titanium at 25 °C to 400 °C
journal, July 1994

  • Kailas, Satish V.; Prasad, Y. V. R. K.; Biswas, S. K.
  • Metallurgical and Materials Transactions A, Vol. 25, Issue 7
  • DOI: 10.1007/BF02665475

Deformation induced anisotropic responses of Ti–6Al–4V alloy. Part I: Experiments
journal, November 2012


Quasi-static and dynamic loading responses and constitutive modeling of titanium alloys
journal, December 2004


Multiaxial and non-proportional loading responses, anisotropy and modeling of Ti–6Al–4V titanium alloy over wide ranges of strain rates and temperatures
journal, June 2007


Deformation induced anisotropic responses of Ti–6Al–4V alloy Part II: A strain rate and temperature dependent anisotropic yield criterion
journal, November 2012


Quasi-static and dynamic shearing of sheet metals
journal, March 1999

  • Klepaczko, Janusz R.; Nguyen, Huu Viem; Nowacki, Wojciech K.
  • European Journal of Mechanics - A/Solids, Vol. 18, Issue 2
  • DOI: 10.1016/S0997-7538(99)80016-3

Experimental lower bounds on geometrically necessary dislocation density
journal, August 2010


Constitutive modeling and the effects of strain-rate and temperature on the formability of Ti–6Al–4V alloy sheet
journal, March 2014


Adiabatic shear failure under biaxial dynamic compression/ shear loading
journal, March 1994


Evolution of microstructure and shear-band formation in α-hcp titanium
journal, March 1994


The role of anisotropy in the response of the titanium alloy Ti–6Al–4V to shock loading
journal, January 2008

  • Millett, J. C. F.; Whiteman, G.; Bourne, N. K.
  • Journal of Applied Physics, Vol. 104, Issue 7
  • DOI: 10.1063/1.2991164

VESTA : a three-dimensional visualization system for electronic and structural analysis
journal, May 2008


Some geometrical relations in dislocated crystals
journal, March 1953


Novel Technique for Static and Dynamic Shear Testing of Ti6Al4V Sheet
journal, October 2011


Dynamic failure by adiabatic shear banding
journal, March 2010


Thermo-mechanical aspects of adiabatic shear failure of AM50 and Ti6Al4V alloys
journal, August 2008


A shear-compression specimen for large strain testing
journal, March 2002

  • Rittel, D.; Lee, S.; Ravichandran, G.
  • Experimental Mechanics, Vol. 42, Issue 1
  • DOI: 10.1007/BF02411052

Estimations of bulk geometrically necessary dislocation density using high resolution EBSD
journal, October 2013


Resolving geometrically necessary dislocation density onto individual dislocation types using EBSD-based continuum dislocation microscopy
journal, January 2016


Anisotropy of the hot plastic deformation of Ti–6Al–4V single-colony samples
journal, May 2009


Texture effects on shear response in Ti–6Al–4V plates
journal, April 2002


Observations of lattice curvature near the interface of a deformed aluminium bicrystal
journal, January 2000


Screw dislocation in hcp Ti : DFT dislocation excess energies and metastable core structures
journal, May 2014

  • Tarrat, Nathalie; Benoit, Magali; Caillard, Daniel
  • Modelling and Simulation in Materials Science and Engineering, Vol. 22, Issue 5
  • DOI: 10.1088/0965-0393/22/5/055016

On capturing the grain-scale elastic and plastic anisotropy of alpha-Ti with spherical nanoindentation and electron back-scattered diffraction
journal, September 2016


Metallographic features associated with the penetration of titanium alloy targets
journal, May 1979

  • Woodward, Raymond L.
  • Metallurgical Transactions A, Vol. 10, Issue 5
  • DOI: 10.1007/BF02658319

Shear Localization in Dynamic Deformation: Microstructural Evolution
journal, February 2008

  • Xu, Yongbo; Zhang, Jinghua; Bai, Yilong
  • Metallurgical and Materials Transactions A, Vol. 39, Issue 4
  • DOI: 10.1007/s11661-007-9431-z

Development of adiabatic shear bands in annealed 316L stainless steel: Part I. Correlation between evolving microstructure and mechanical behavior
journal, August 2006

  • Xue, Q.; Gray, G. T.
  • Metallurgical and Materials Transactions A, Vol. 37, Issue 8
  • DOI: 10.1007/BF02586217

Self-organization of shear bands in titanium and Ti–6Al–4V alloy
journal, February 2002


Formation mechanisms of nanostructures in stainless steel during high-strain-rate severe plastic deformation
journal, November 2005


Influence of shock prestraining on the formation of shear localization in 304 stainless steel
journal, June 2005

  • Xue, Q.; Gray, G. T.; Henrie, B. L.
  • Metallurgical and Materials Transactions A, Vol. 36, Issue 6
  • DOI: 10.1007/s11661-005-0239-4

Microstructural characteristics of post-shear localization in cold-rolled 316L stainless steel
journal, January 2007


EBSD characterization of dynamic shear band regions in pre-shocked and as-received 304 stainless steels
journal, January 2008

  • Xue, Q.; Bingert, J. F.; Henrie, B. L.
  • Materials Science and Engineering: A, Vol. 473, Issue 1-2
  • DOI: 10.1016/j.msea.2007.04.048

Modeling periodic adiabatic shear band evolution during high speed machining Ti-6Al-4V alloy
journal, January 2013


Analysis of strain localization for ductile materials with effect of void growth
journal, July 2004


Intrinsic anisotropy of strain rate sensitivity in single crystal alpha titanium
journal, October 2016


On the formation of adiabatic shear bands in textured HCP polycrystals
journal, April 2016


Determination of geometrically necessary dislocations in large shear strain localization in aluminum
journal, October 2016


Works referencing / citing this record:

Crystal symmetry determination in electron diffraction using machine learning
journal, January 2020

  • Kaufmann, Kevin; Zhu, Chaoyi; Rosengarten, Alexander S.
  • Science, Vol. 367, Issue 6477
  • DOI: 10.1126/science.aay3062

A comparison of adiabatic shear bands in wrought and additively manufactured 316L stainless steel using nanoindentation and electron backscatter diffraction
journal, September 2019

  • Weaver, Jordan S.; Livescu, Veronica; Mara, Nathan A.
  • Journal of Materials Science, Vol. 55, Issue 4
  • DOI: 10.1007/s10853-019-03994-8