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Title: Mechanism-based modeling of thermal and irradiation creep behavior: An application to ferritic/martensitic HT9 steel

Journal Article · · International Journal of Plasticity

In this work, the creep behavior of HT9 steel in both thermal and irradiation environments is predicted using an integrated modeling framework. Multiple physical mechanisms such as diffusional creep and dislocation climb are incorporated into crystal plasticity calculations using the Visco-Plastic Self-Consistent (VPSC) approach. Climb velocities are informed by mean field rate theory laws in place of empirical power law formulations. More interestingly, the climb velocities explicitly consider the contribution of irradiation-induced point defects, i.e., stress induced preferential absorption (SIPA) effect. The developed expressions are shown to apply under conventional thermal creep and to the more complex irradiation conditions as well. This physically-informed, mechanism-based model is used to simulate the creep strain evolution of HT9 pressurized tubes under various loading conditions. Furthermore, it is demonstrated that the experimental behavior of this material reported in the literature is well described by this theoretical framework. The role of each relevant mechanism is discussed.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1581575
Alternate ID(s):
OSTI ID: 2325521
Report Number(s):
LA-UR-19-28064; TRN: US2100871
Journal Information:
International Journal of Plasticity, Vol. 126, Issue C; ISSN 0749-6419
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

References (50)

Precipitate design for creep strengthening of 9% Cr tempered martensitic steel for ultra-supercritical power plants journal January 2008
Phase stability of an HT-9 duct irradiated in FFTF journal November 2012
A dislocation-based constitutive model for viscoplastic deformation of fcc metals at very high strain rates journal January 2011
MD description of damage production in displacement cascades in copper and α-iron journal December 2003
A combined APT and SANS investigation of α′ phase precipitation in neutron-irradiated model FeCrAl alloys journal May 2017
The stress-induced point defect-dislocation interaction and its relevance to irradiation creep journal April 1975
Atom probe study of irradiation-enhanced α′ precipitation in neutron-irradiated Fe–Cr model alloys journal July 2015
A Model for Boundary Diffusion Controlled Creep in Polycrystalline Materials journal June 1963
Scaling of Dislocation Strengthening by Multiple Obstacle Types journal June 2010
Microstructural evolution of ferritic-martensitic steels irradiated in the fast breeder reactor Phénix journal October 1993
Irradiation-enhanced α′ precipitation in model FeCrAl alloys journal April 2016
Irradiation creep and interrelation with swelling in austenitic stainless steels journal September 1981
Dislocation theory based constitutive modelling: foundations and applications journal August 1998
Radiation tolerance of neutron-irradiated model Fe–Cr–Al alloys journal October 2015
Multislip in f.c.c. crystals a theoretical approach compared with experimental data journal August 1982
The co-evolution of microstructure features in self-ion irradiated HT9 at very high damage levels journal February 2017
Free Energy Generalization of the Peierls Potential in Iron journal August 2013
Entropy Factors for Thermally Activated Unpinning of Dislocations journal September 1964
Analysis of the asymptotic properties of X-ray line broadening caused by dislocations journal December 2000
Steady-state irradiation creep journal May 1974
Microstructural analysis of neutron-irradiated martensitic steels journal June 1996
A crystallographic dislocation model for describing hardening of polycrystals during strain path changes. Application to low carbon steels journal July 2013
Elevated temperature ferritic and martensitic steels and their application to future nuclear reactors journal October 2005
A Statistical Theory of Solid Solution Hardening journal January 1970
Double strengthening of copper by dissolved gold-atoms and by incoherent SiO2-particles: how do the two strengthening contributions superimpose? journal September 2000
Self-consistent modelling of the mechanical behaviour of viscoplastic polycrystals incorporating intragranular field fluctuations journal August 2007
Modeling the mechanical response of polycrystals deforming by climb and glide journal February 2010
A self-consistent anisotropic approach for the simulation of plastic deformation and texture development of polycrystals: Application to zirconium alloys journal September 1993
Solute strengthening at high temperatures journal July 2016
Plane wave simulation of elastic-viscoplastic single crystals journal September 2014
Characterization and comparative analysis of the tensile properties of five tempered martensitic steels and an oxide dispersion strengthened ferritic alloy irradiated at ≈295 °C to ≈6.5 dpa journal January 2016
Irradiation creep models — an overview journal October 1988
Molecular dynamics study of self-diffusion in bcc Fe journal October 2009
A mechanism for the negative strain-rate sensitivity of dilute solid solutions journal July 2004
Kinetics of α’-phase nucleation during thermal aging of Fe–22% Cr alloy journal March 2016
Microstructural analysis of an HT9 fuel assembly duct irradiated in FFTF to 155dpa at 443°C journal September 2009
Cascade morphology transition in bcc metals journal May 2015
Single-mechanism rate theory for dynamic strain aging in fcc metals journal September 2008
Solute strengthening of both mobile and forest dislocations: The origin of dynamic strain aging in fcc metals journal September 2008
Analysis of Obstacle Hardening Models Using Dislocation Dynamics: Application to Irradiation-Induced Defects journal May 2015
Irradiation creep of 11Cr–0.5Mo–2W,V,Nb ferritic–martensitic, modified 316, and 15Cr–20Ni austenitic S.S. irradiated in FFTF to 103–206 dpa journal December 2000
A crystal plasticity model based on transition state theory journal June 2017
Stress and strain relaxation in magnesium AZ31 rolled plate: In-situ neutron measurement and elastic viscoplastic polycrystal modeling journal April 2016
Mechanical behavior of low carbon steel subjected to strain path changes: Experiments and modeling journal June 2016
A Physics-Based Crystallographic Modeling Framework for Describing the Thermal Creep Behavior of Fe-Cr Alloys journal February 2017
Mechanism-based modeling of solute strengthening: Application to thermal creep in Zr alloy journal July 2018
The determination of density and distribution of dislocations in deformed single crystals from broadened X-ray diffraction profiles journal June 1970
Irradiation creep due to elastodiffusion journal February 1984
Dislocation motion in a random solid solution journal October 2002
Radiation induced segregation and precipitation behavior in self-ion irradiated Ferritic/Martensitic HT9 steel journal August 2017

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