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Title: Physically-based strength model of tantalum incorporating effects of temperature, strain rate and pressure

Journal Article · · Modelling and Simulation in Materials Science and Engineering
 [1];  [1];  [1];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Drexel Univ., Philadelphia, PA (United States)

In this work, we develop a tantalum strength model that incorporates e ects of temperature, strain rate and pressure. Dislocation kink-pair theory is used to incorporate temperature and strain rate e ects while the pressure dependent yield is obtained through the pressure dependent shear modulus. Material constants used in the model are parameterized from tantalum single crystal tests and polycrystalline ramp compression experiments. It is shown that the proposed strength model agrees well with the temperature and strain rate dependent yield obtained from polycrystalline tantalum experiments. Furthermore, the model accurately reproduces the pressure dependent yield stresses up to 250 GPa. The proposed strength model is then used to conduct simulations of a Taylor cylinder impact test and validated with experiments. This approach provides a physically-based multi-scale strength model that is able to predict the plastic deformation of polycrystalline tantalum through a wide range of temperature, strain and pressure regimes.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1259532
Report Number(s):
SAND-2015-9807J; 607815
Journal Information:
Modelling and Simulation in Materials Science and Engineering, Vol. 24, Issue 5; ISSN 0965-0393
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

References (48)

Some surprising features of the plastic deformation of body-centered cubic metals and alloys journal July 1983
Thermally-activated deformation of BCC metals and alloys journal January 1992
Plastic anisotropy in b.c.c. transition metals journal March 1998
Simulation and modelling of forest hardening in body centre cubic crystals at low temperature journal September 1999
Slip planes in bcc transition metals journal June 2013
Constitutive equations for hot-working of metals journal January 1985
Fracture characteristics of three metals subjected to various strains, strain rates, temperatures and pressures journal January 1985
Dislocation‐mechanics‐based constitutive relations for material dynamics calculations journal March 1987
A constitutive description of the deformation of copper based on the use of the mechanical threshold stress as an internal state variable journal January 1988
Behaviors of three BCC metal over a wide range of strain rates and temperatures: experiments and modeling journal January 1999
Constitutive behavior of tantalum and tantalum-tungsten alloys journal October 1996
A constitutive model for metals applicable at high‐strain rate journal March 1980
A constitutive model for strain rates from 10 4 to 10 6 s 1 journal February 1989
Model of plastic deformation for extreme loading conditions journal January 2003
Temperature and strain-rate dependence of the flow stress of ultrapure tantalum single crystals journal November 1987
Why anomalous slip in body-centred cubic metals? journal December 2001
Kinetics of flow stress in crystals with high intrinsic lattice friction journal August 2007
The Flow Stress of High-Purity Refractory Body-Centred Cubic Metals and its Modification by Atomic Defects journal November 1995
Work hardening and flow stress of ultrapure molybdenum single crystals journal December 2001
Analysis of flow-stress measurements of high-purity tungsten single crystals journal June 2000
The plastic properties of high-purity W single crystals journal February 2000
Strain-Rate and Temperature Dependence of the Tensile Flow Stress of High-Purity α-Iron above 250 K (Regime I) Studied by Means of Stress-Relaxation Tests journal March 1991
Temperature and Strain-Rate Dependence of the Tensile Flow Stress of High-Purity α-Iron below 250 K II. Stress/Temperature Regime II and Its Transitions to Regimes I and III journal May 1991
Temperature- and strain-rate dependence of the flow stress of ultrapure niobium single crystals in cyclic deformation journal September 1983
A physically based model of temperature and strain rate dependent yield in BCC metals: Implementation into crystal plasticity journal January 2015
A multi-scale model of dislocation plasticity in α-Fe: Incorporating temperature, strain rate and non-Schmid effects journal October 2015
Flow strength of tantalum under ramp compression to 250 GPa journal January 2014
ALEGRA: An Arbitrary Lagrangian-Eulerian Multimaterial, Multiphysics Code conference June 2012
The Mechanism of Plastic Deformation of Crystals. Part I. Theoretical journal July 1934
Mechanical properties of tantalum under high pressure journal October 2005
Yield strength of tantalum for shockless compression to 18 GPa journal October 2009
A multiscale strength model for extreme loading conditions journal April 2011
Peierls potential of screw dislocations in bcc transition metals: Predictions from density functional theory journal February 2013
Plastic deformation of b.c.c. polycrystals journal February 1964
The relation between polycrystal deformation and single-crystal deformation journal May 1970
Calculation of the taylor factor and lattice rotations for bcc metals deforming by pencil glide journal December 1971
On the relationship between uniaxial yield strength and resolved shear stress in polycrystalline materials journal December 2000
The temperature and strain rate dependence of the flow stress of tantalum journal August 1977
A coupled temperature and strain rate dependent yield function for dynamic deformations of bcc metals journal August 2006
A unified constitutive model for quasi-static flow responses of pure Ta and Ta–W alloys journal January 2011
Shock-induced deformation twinning in tantalum journal January 1997
The use of flat-ended projectiles for determining dynamic yield stress I. Theoretical considerations journal September 1948
The mechanical threshold stress constitutive-strength model description of HY-100 steel journal August 2000
Laws for Work-Hardening and Low-Temperature Creep journal January 1976
On the modeling of the Taylor cylinder impact test for orthotropic textured materials: experiments and simulations journal March 1999
Low-symmetry plastic deformation in BCC tantalum: experimental observations, modeling and simulations journal April 2003
Elastic-viscoplastic anisotropic modeling of textured metals and validation using the Taylor cylinder impact test journal June 2007
Interplay of dislocation slip and deformation twinning in tantalum at high strain rates journal November 2013

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Anisotropy and Strain Localization in Dynamic Impact Experiments of Tantalum Single Crystals journal April 2018

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