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The effects of ultra-fine-grained structure and cryogenic temperature on adiabatic shear localization in titanium

Journal Article · · Acta Materialia
 [1];  [2];  [3];  [4];  [5];  [6];  [5]
  1. Univ. of California, San Diego, La Jolla, CA (United States); The Regents of the University of California, U.C. San Diego
  2. Univ. of California, Berkeley, CA (United States)
  3. Central South Univ., Changsha (China)
  4. Univ. of California, San Diego, La Jolla, CA (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
  5. Univ. of California, San Diego, La Jolla, CA (United States)
  6. Ufa State Aviation Technical Univ., Ufa (Russia)

The deformation at low temperatures (173 K and 77 K) in ultrafine-grained (100 and 500 nm) titanium is investigated and its effect on adiabatic shear localization is established. In comparison with coarse grained titanium, the strength of ultrafine-grained titanium is higher due to the classic Hall-Petch effect while the strain hardening approaches zero. Our results show that shear localization in dynamic deformation is also altered. The width of the shear band of coarse-grained titanium decreases from 30 to 18 mm (by 40%) with decreasing the initial deformation temperature to 77 K. In contrast, for 100 nm titanium, the width of shear band decreases more significantly, from 4 mmat room temperature to 1 mm (a 75% decrease) at 77 K. This difference is attributed to the combined effects of the decrease in the thermal conductivity and specific heat capacity, and the increase in thermal softening rate. These changes in the width are consistent with the predictions of the Grady and Bai-Dodd theories. Ultrafine- and nanorecrystallized grains are observed inside the bands which are dependent on initial grain size and initial deformation temperature. Here, the dislocation evolution is evaluated for the different conditions using a Kocks-Mecking formulation; the rotational dynamic recrystallization mechanism responsible for forming the ultrafine/nanosized grains (40-250 nm) is successfully modeled incorporating the differences in initial temperature and grain size. Our results and analysis are important in enhancing the understanding of the structural evolution processes under high strain-rates and cryogenic temperatures.

Research Organization:
Univ. of California, San Diego, La Jolla, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003842; NA0002080
OSTI ID:
1634201
Alternate ID(s):
OSTI ID: 1570793
OSTI ID: 1573200
Journal Information:
Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 181; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (64)

Ueber die Wärme-Leitungsfähigkeit der Metalle journal January 1853
Zur Theorie der spezifischen Wärmen journal January 1912
Adiabatic shear localization in titanium and Ti-6 pct Al-4 pct V alloy journal May 1985
A model for microstructure evolution in adiabatic shear bands journal January 1998
The structure of adiabatic shear bands in a titanium alloy journal April 1985
Observation of an adiabatic shear band in titanium by high-voltage transmission electron microscopy journal December 1986
The structure of adiabatic shear bands in metals: A critical review journal February 1987
The thermal and electrical conductivity of titanium and its alloys journal June 1961
On the adiabatic shear of Ti6Al4V ballistic targets journal April 1983
Evolution of microstructure and shear-band formation in α-hcp titanium journal March 1994
Dissipation in adiabatic shear bands journal March 1994
The dependence of grain size on stress during dynamic recrystallisation journal May 1991
Dynamic recrystallization in high-strain, high-strain-rate plastic deformation of copper journal September 1994
Adiabatic shear bands in a TI-6Al-4V titanium alloy journal October 1998
Physics and phenomenology of strain hardening: the FCC case journal January 2003
Shear localization in dynamic deformation of materials: microstructural evolution and self-organization journal October 2001
Spontaneous and forced shear localization in high-strain-rate deformation of tantalum journal August 1999
Combined atomistic and mesoscale simulation of grain growth in nanocrystalline thin films journal April 2002
Quantifying the Microstructures of Pure Cu Subjected to Dynamic Plastic Deformation at Cryogenic Temperature journal August 2011
Self-organization of shear bands in titanium and Ti–6Al–4V alloy journal February 2002
Effects of nanocrystalline and ultrafine grain sizes on constitutive behavior and shear bands in iron journal July 2003
The high-strain-rate response of alpha-titanium: experiments, deformation mechanisms and modeling journal January 1998
Microstructure of high-strain, high-strain-rate deformed tantalum journal February 1998
Mechanical properties and deformation mechanisms of a commercially pure titanium journal October 1999
Nanostructured materials: basic concepts and microstructure journal January 2000
On the grain size softening in nanocrystalline materials journal May 2000
Advanced mechanical properties of pure titanium with ultrafine grained structure journal October 2001
Failure mode and dynamic behavior of nanophase iron under compression journal December 1999
Adiabatic shear banding in ultrafine-grained Fe processed by severe plastic deformation journal April 2004
Nucleation and propagation of dislocations in nanocrystalline fcc metals journal April 2006
Ultrafine-grain-sized zirconium by dynamic deformation journal September 2006
Microstructural evolution and nanostructure formation in copper during dynamic plastic deformation at cryogenic temperatures journal January 2008
High-strain-rate response of ultra-fine-grained copper journal July 2008
Effect of the Zener–Hollomon parameter on the microstructures and mechanical properties of Cu subjected to plastic deformation journal February 2009
Perspectives on Titanium Science and Technology journal February 2013
Dynamic deformation and failure of ultrafine-grained titanium journal February 2017
EBSD analysis of grain-refinement mechanisms operating during equal-channel angular pressing of commercial-purity titanium journal July 2019
Investigation of the shear response and geometrically necessary dislocation densities in shear localization in high-purity titanium journal May 2017
Continuous dynamic recrystallization during severe plastic deformation journal November 2015
Evolution of microstructure, macrotexture and mechanical properties of commercially pure Ti during ECAP-conform processing and drawing journal February 2013
A comparative study on the microstructure and mechanical behavior of titanium: Ultrafine grain vs. coarse grain journal July 2016
Microstructure evolution and strengthening mechanisms in commercial-purity titanium subjected to equal-channel angular pressing journal July 2017
Annealing behavior of severely-deformed titanium Grade 4 journal January 2019
Mechanical properties of nanocrystalline materials journal May 2006
Principles of equal-channel angular pressing as a processing tool for grain refinement journal September 2006
An analysis of the strain hardening behavior of ultra-fine grain pure titanium journal May 2006
Grain size effect on deformation twinning propensity in ultrafine-grained hexagonal close-packed titanium journal September 2013
Examination of thermal properties by scanning thermal microscopy in ultrafine-grained pure titanium surface layer produced by surface mechanical attrition treatment journal September 2004
Materials science: Nanomaterial advantage journal October 2002
Nanostructuring of metals by severe plastic deformation for advanced properties journal August 2004
Playing with defects in metals journal June 2017
Deformation behavior and plastic instabilities of ultrafine-grained titanium journal July 2001
Low-temperature deformation and fracture of bulk nanostructural titanium obtained by intense plastic deformation using equal channel angular pressing journal November 2002
Effect of Strain Rate Upon Plastic Flow of Steel journal January 1944
A model for the effect of grain size on the yield stress of metals journal November 1982
Adiabatic shear of titanium and polymethylmethacrylate journal April 1975
Temperature Rise Associated with Adiabatic Shear Band: Causality Clarified journal January 2019
Theory of Dislocations (2nd ed.) journal June 1983
Strengthening Materials by Engineering Coherent Internal Boundaries at the Nanoscale journal April 2009
Revealing the Maximum Strength in Nanotwinned Copper journal January 2009
Width of adiabatic shear bands formed under combined stresses journal June 1989
Compressive Deformation Behaviors of Coarse- and Ultrafine-Grained Pure Titanium at Different Temperatures: A Comparative Study journal January 2011
60 Years of Hall-Petch: Past to Present Nano-Scale Connections journal January 2014
Thermal expansion of titanium journal February 1943

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