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Title: Shock and Microstructural Characterization of the α-ω Phase Transition in Titanium Crystals

Journal Article · · Journal of Dynamic Behavior of Materials

In this paper, a multicrystal comprised of a small number of large crystals of high-purity titanium and a [ 0001 ] oriented high-purity single crystal titanium sample were shock loaded using gas gun plate impact experiments. Tests were performed at stresses above the α ω phase transition stress (for high-purity polycrystalline specimens) to observe the behavior of oriented crystals under similar conditions. Post-mortem characterization of the shocked microstructure was conducted on the single crystal sample to measure textures, and quantify phases and twinning. The apparent activation of plastic and transformation mechanisms was dependent upon crystal orientation. Specifically, the [ 0001 ] crystal showed a higher Hugoniot elastic limit than the [ 10 1 ¯ 0 ] or [ 3 1 ¯ 4 ¯ 4 ] orientations. The slope of velocity as a function of time was lower in the [ 0001 ] orientation than the other orientations during plastic deformation, indicating sluggish transformation kinetics for the α to ω phase transition for the [ 0001 ] oriented crystal. Finally, microtexture measurements of a recovered [ 0001 ] oriented single crystal revealed the presence of retained ω phase after unloading, with orientations of the constituent phase fractions indicative of the forward α→ω transition, rather than the reverse ω→α transition, suggesting that the material never achieved a state of 100% ω phase.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1458953
Report Number(s):
LA-UR-16-29363
Journal Information:
Journal of Dynamic Behavior of Materials, Vol. 3, Issue 4; ISSN 2199-7446
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (57)

Micro-cantilever testing of ⟨a⟩ prismatic slip in commercially pure Ti journal March 2011
Anisotropic shock response of titanium: Reorientation and transformation mechanisms journal February 2014
Orientation Effect on Mechanical Properties of Commercially Pure Titanium at Room Temperature journal February 2007
Examination of the α-ω two-phase shock-induced microstructure in zirconium and titanium
  • Morrow, Benjamin M.; Escobedo, J. Pablo; Field, Robert D.
  • SHOCK COMPRESSION OF CONDENSED MATTER - 2015: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/1.4971658
conference January 2017
Microscopic and crystallographic aspects of retained omega phase in shock-loaded zirconium and its formation mechanism journal February 1995
Compact system for high-speed velocimetry using heterodyne techniques journal August 2006
An examination of the use of the Modified Jogged-Screw model for predicting creep behavior in Zircaloy-4 journal July 2013
Flow asymmetry and nucleation stresses of twinning and non-basal slip in magnesium journal May 2013
Transmission Electron Microscope In Situ Straining Technique to Directly Observe Defects and Interfaces During Deformation in Magnesium journal May 2015
Strain hardening of titanium: role of deformation twinning journal August 2003
Stochastic modeling of twin nucleation in polycrystals: An application in hexagonal close-packed metals journal May 2014
Computational design of recovery experiments for ductile metals journal August 2005
Omega phase formation in shock-loaded zirconium conference January 1994
Shear banding in commercial pure titanium deformed by dynamic compression journal October 2014
Experimental study on the dynamic tensile behavior of a poly-crystal pure titanium at elevated temperatures journal January 2007
Orientation Relations During the α - ω Phase Transition of Zirconium: In Situ Texture Observations at High Pressure and Temperature journal November 2013
Toward understanding twin–twin interactions in hcp metals: Utilizing multiscale techniques to characterize deformation mechanisms in magnesium journal September 2014
Characterization and modeling of mechanical behavior of single crystal titanium deformed by split-Hopkinson pressure bar journal July 2016
The effects of deformation conditions on microstructure and texture of commercially pure Ti journal November 2009
Effect of twinning on microstructure and texture evolutions of pure Ti during dynamic plastic deformation journal March 2013
Structural phase stability in nanocrystalline titanium to 161 GPa journal September 2014
The Influence of Interstitial Oxygen on the Alpha to Omega Phase Transition in Titanium and Zirconium
  • Cerreta, E.
  • SHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/1.2263526
conference January 2006
In-Situ TEM Observation of Twinning and Detwinning During Cyclic Loading in Mg journal April 2013
The α–ω phase transition in shock-loaded titanium journal July 2017
Omega phase in materials journal January 1982
Collective nature of plasticity in mediating phase transformation under shock compression journal June 2014
The orientation relationship between the α- and ω-phases of titanium and zirconium journal September 1973
The use of X-ray diffraction to determine slip and twinning activity in commercial-purity (CP) titanium journal October 2008
Quantitative analysis of deformation twinning in zirconium journal March 2009
Effects of high rates of loading on the deformation behavior and failure mechanisms of hexagonal close-packed metals and alloys journal March 2002
Pressure-induced transition in titanium metal a systematic study of the effects of uniaxial stress journal January 2005
Mechanical properties and deformation mechanisms of a commercially pure titanium journal October 1999
The influence of crystallographic texture and interstitial impurities on the mechanical behavior of zirconium journal August 2000
Alpha to Omega Transition in Shock Compressed Zirconium: Crystallographic Aspects journal August 2008
Foreword: Multiscale Perspectives on Plasticity in HCP Metals journal September 2014
Modeling Dynamic Phase Transitions in Ti and Zr
  • Greeff, C. W.
  • SHOCK COMPRESSION OF CONDENSED MATTER - 2003: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/1.1780218
conference January 2004
Constitutive description of dynamic deformation: physically-based mechanisms journal January 2002
A model for experimentally-observed high-strain-rate dynamic strain aging in titanium journal July 2000
Influence of Temperature upon the α→ω Transition in Titanium
  • Bezruchko, G. S.
  • SHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/1.2263296
conference January 2006
Influence of texture and test velocity on the dynamic, high-strain, tensile behavior of zirconium journal June 2012
Substructure evolution of Zircaloy-4 during creep and implications for the Modified Jogged-Screw model journal May 2016
Deformation twinning journal January 1995
Variability in EBSD statistics for textured zirconium journal July 2013
Anisotropic response of high-purity α-titanium: Experimental characterization and constitutive modeling journal April 2010
Inelastic deformation and phase transformation of shock compressed silicon single crystals journal November 2007
Hardening evolution of AZ31B Mg sheet journal January 2007
Observations of the Atomic Structure of Tensile and Compressive Twin Boundaries and Twin–Twin Interactions in Zirconium journal August 2014
Influence of impurities on the α to ω phase transition in zirconium under dynamic loading conditions journal December 2009
Shock-induced α–ω transition in titanium journal September 2001
The influence of phase and substructural evolution during dynamic loading on subsequent mechanical properties of zirconium journal December 2013
Adiabatic release measurements in α -quartz between 300 and 1200 GPa: Characterization of α -quartz as a shock standard in the multimegabar regime journal November 2013
Crystallography and a model of the α → ω phase transformation in zirconium journal April 1981
Dynamic mechanical behavior of pure titanium journal November 2004
Evolution of microstructure and shear-band formation in α-hcp titanium journal March 1994
A dislocation-based constitutive law for pure Zr including temperature effects journal May 2008
Impurities block the α to ω martensitic transformation in titanium journal January 2005
The high-strain-rate response of alpha-titanium: experiments, deformation mechanisms and modeling journal January 1998

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