Title: The origin and stability of nanostructural hierarchy in crystalline solids

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4];  [5]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States). Materials Science and Engineering Department; DOE/OSTI
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States). Fuels Modeling and Simulation
  3. Federal-Mogul Powertrain, Plymouth, MI (United States)
  4. Univ. of California, Santa Barbara, CA (United States). Materials Department
  5. Univ. of Michigan, Ann Arbor, MI (United States)

The structural hierarchy exhibited by materials on more than one length scale can play a major part in determining bulk material properties. Understanding the hierarchical structure can lead to new materials with physical properties tailored for specific applications. We have used a combined experimental and phase-field modeling approach to explore such a hierarchical structure at nanoscale for enhanced coarsening resistance of ordered γ' precipitates in an experimental, multicomponent, high-refractory nickel-base superalloy. The hierarchical microstructure formed experimentally in this alloy is composed of a γ matrix with γ' precipitates that contain embedded, spherical γ precipitates, which do not directionally coarsen during high-temperature annealing but do delay coarsening of the larger γ' precipitates. Chemical mapping via atom probe tomography suggests that the supersaturation of Co, Ru, and Re in the γ' phase is the driving force for the phase separation, leading to the formation of this hierarchical microstructure. Representative phase-field modeling highlights the importance of larger γ' precipitates to promote stability of the embedded γ phase and to delay coarsening of the encompassing γ' precipitates. Our results suggest that the hierarchical material design has the potential to influence the high-temperature stability of precipitate strengthened metallic materials.

Research Organization:
UT-Battelle LLC/ORNL, Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC07-05ID14517
OSTI ID:
1625982
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 11 Vol. 4; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

References (44)

Coarsening of γ (Ni–Al solid solution) precipitates in a γ′ (Ni3Al) matrix journal August 2007
Phase-field simulation of coarsening of γ precipitates in an ordered γ′ matrix journal October 2007
A quantitative phase-field model for two-phase elastically inhomogeneous systems journal March 2015
Strengthening of an L12-ordered γ′-intermetallic by disordered γ-particles. Part II: Measurements of the CRSS and TEM observations of dislocation processes in Ni69Co9Al18Ti4 journal June 2001
A low-cost hierarchical nanostructured beta-titanium alloy with high strength journal April 2016
Mapping the evolution of hierarchical microstructures in a Ni-based superalloy journal December 2013
Evaluation of interfacial excess contributions in different phase-field models for elastically inhomogeneous systems journal June 2013
Combining phase field approach and homogenization methods for modelling phase transformation in elastoplastic media journal October 2009
Electron Tomography Imaging and Analysis ofγ′ andγ Domains in Ni-based Superalloys journal May 2008
Interfacial free energies and solute diffusivities from data on Ostwald ripening journal January 1995
Lattice misfits in four binary Ni-Base γ/γ1 alloys at ambient and elevated temperatures journal October 1996
Temperature and composition dependence of the elastic constants of Ni3Al journal September 1999
Studies on the Solidification Path of Single Crystal Superalloys journal January 2016
Ostwald ripening in concentrated alloys journal March 1994
The dynamics of precipitate evolution in elastically stressed solids—I. Inverse coarsening journal May 1996
Thermodynamic re-assessment of the ternary system Al-Cr-Ni journal June 2001
Thermo-Calc & DICTRA, computational tools for materials science journal June 2002
Strengthening of an L12-ordered γ′-intermetallic by disordered γ-particles. Part II: Measurements of the CRSS and TEM observations of dislocation processes in Ni69Co9Al18Ti4 journal June 2001
Elastic Constants of a Ni-12.69 AT. % Al Alloy From 295 to 1300 K journal December 1997
Effects of rhenium addition on the temporal evolution of the nanostructure and chemistry of a model Ni–Cr–Al superalloy. II: Analysis of the coarsening behavior journal February 2007
Coarsening of γ (Ni–Al solid solution) precipitates in a γ′ (Ni3Al) matrix journal August 2007
Phase-field simulation of coarsening of γ precipitates in an ordered γ′ matrix journal October 2007
Precipitation kinetics of γ phase in an inverse Ni–Al alloy journal June 2017
A quantitative phase-field model for two-phase elastically inhomogeneous systems journal March 2015
Disorder strengthening of ordered L1 2 alloys by face centered cubic (A1) precipitates journal September 2017
Primary and secondary precipitates in a hierarchical-precipitate-strengthened ferritic alloy journal June 2017
Coarsening behaviours of coherent γ′ and γ precipitates in elastically constrained Ni–Al–Ti alloys journal May 2004
Elemental partitioning in Ru-containing nickel-base single crystal superalloys journal May 2007
Coarsening of Ni–Ge solid-solution precipitates in “inverse” Ni3Ge alloys journal July 2012
A Pt-modified Ni-base superalloy with high temperature precipitate stability journal July 2015
MOOSE: A parallel computational framework for coupled systems of nonlinear equations journal October 2009
Phase-field Simulation of Microstructural Evolution of γ Precipitate in γ′ Matrix in Binary Ni-Al Alloys journal January 2012
Coarsening of ? (Ni?Al solid solution) precipitates in a ?? (NiAl) matrix; a striking contrast in behavior from normal ?/?? alloys journal June 2005
Evolution of nanoscale clusters in γ′ precipitates of a Ni–Al–Ti model alloy journal December 2015
A low-cost hierarchical nanostructured beta-titanium alloy with high strength journal April 2016
Mapping the evolution of hierarchical microstructures in a Ni-based superalloy journal December 2013
Ferritic Alloys with Extreme Creep Resistance via Coherent Hierarchical Precipitates journal November 2015
Evaluation of interfacial excess contributions in different phase-field models for elastically inhomogeneous systems journal June 2013
Phase-field model for binary alloys journal December 1999
Life Estimation of Pressurized-Air Solar-Thermal Receiver Tubes journal October 2012
Design of a creep resistant nickel base superalloy for power plant applications: Part 1 - Mechanical properties modelling journal March 2003
Phase Transformations in Metals and Alloys (Revised Reprint) book February 2009
Combining phase field approach and homogenization methods for modelling phase transformation in elastoplastic media journal January 2009
Gamma/Gamma-Prime Microstructure Formed by Phased Separation of Gamma-Prime Precipitates in a Ni-Al-Ti Alloy conference January 2004