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Title: Role of microstructure on twin nucleation and growth in HCP titanium: A statistical study

Journal Article · · Acta Materialia

In this study, a detailed statistical analysis is performed using Electron Back Scatter Diffraction (EBSD) to establish the effect of microstructure on twin nucleation and growth in deformed commercial purity hexagonal close packed (HCP) titanium. Rolled titanium samples are compressed along rolling, transverse and normal directions to establish statistical correlations for {10–12}, {11–21}, and {11–22} twins. A recently developed automated EBSD-twinning analysis software is employed for the statistical analysis. Finally, the analysis provides the following key findings: (I) grain size and strain dependence is different for twin nucleation and growth; (II) twinning statistics can be generalized for the HCP metals magnesium, zirconium and titanium; and (III) complex microstructure, where grain shape and size distribution is heterogeneous, requires multi-point statistical correlations.

Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1427380
Alternate ID(s):
OSTI ID: 1548768; OSTI ID: 22744491
Report Number(s):
LA-UR-17-29637
Journal Information:
Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 148; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (34)

The high-strain-rate response of alpha-titanium: experiments, deformation mechanisms and modeling journal January 1998
Strain hardening due to deformation twinning in α-titanium: Constitutive relations and crystal-plasticity modeling journal July 2005
Numerical study of the stress state of a deformation twin in magnesium journal February 2015
Nucleation of paired twins at grain boundaries in titanium journal October 2010
Modeling bending of α-titanium with embedded polycrystal plasticity in implicit finite elements journal March 2013
A rationale for the strong dependence of mechanical twinning on grain size journal October 2008
Study of $$ \{ 11\bar{2} 1\} $$ Twinning in α-Ti by EBSD and Laue Microdiffraction journal April 2013
Slip, twinning, and fracture in hexagonal close-packed metals journal March 1981
Influence of temperature and strain rate on slip and twinning behavior of zr journal October 1995
Growth Twins and Deformation Twins in Metals journal July 2014
Strain hardening of titanium: role of deformation twinning journal August 2003
Sensitivity of deformation twinning to grain size in titanium and magnesium journal December 2011
Basal slip and twinning in α-titanium single crystals journal April 1975
Dislocation mediated variant selection for secondary twinning in compression of pure titanium journal February 2017
Deformation twinning in h.c.p. metals and alloys journal May 1991
The importance of mechanical twinning in the stress-strain behavior of swaged high purity fine-grained titanium below 424°K journal October 1971
Twin Nucleation by Slip Transfer across Grain Boundaries in Commercial Purity Titanium journal November 2009
Mechanical properties and deformation mechanisms of a commercially pure titanium journal October 1999
Effect of Grain Size on the Tensile Deformation Mechanisms of Commercial Pure Titanium as Revealed by Acoustic Emission journal March 2015
Effect of deformation twinning on microstructure and texture evolution during cold rolling of CP-titanium journal May 2005
Effect of local stress fields on twin characteristics in HCP metals journal September 2016
A multi-scale statistical study of twinning in magnesium journal March 2011
In Situ Characterization of Twin Nucleation in Pure Ti Using 3D-XRD journal November 2013
Growth of { 11 2 ¯ 2 } twins in titanium: A combined experimental and modelling investigation of the local state of deformation journal March 2017
A statistical analysis of the influence of microstructure and twin–twin junctions on twin nucleation and twin growth in Zr journal August 2015
The Influence of Grain Size on Twinning and Microstructure Refinement During Cold Rolling of Commercial-Purity Titanium journal August 2016
Initiation and accommodation of primary twins in high-purity titanium journal June 2014
Grain size constraints on twin expansion in hexagonal close packed crystals journal October 2016
Statistical analyses of deformation twinning in magnesium journal May 2010
Grain size effect on deformation twinning propensity in ultrafine-grained hexagonal close-packed titanium journal September 2013
Low-cycle fatigue behaviors of commercial-purity titanium journal August 1998
Strain hardening due to deformation twinning in α-titanium: Mechanisms journal January 2006
Nucleation and growth of twins in Zr: A statistical study journal December 2009
Effect of grain size on mechanical property of Mg–3Al–1Zn alloy journal July 2008

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