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Title: Group precipitation and age hardening of nanostructured Fe-based alloys with ultra-high strengths

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep21364· OSTI ID:1259853
 [1];  [1];  [2];  [1];  [1]
  1. City Univ. of Hong Kong, Hong Kong (China)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The precipitation of nanoparticles plays a key role in determining the properties of many structural materials, and the understanding of their formation and stabilization mechanisms has been a long standing interest in the material field. However, the critical issues involving the group precipitation of various nanoparticles and their cooperative hardening mechanism remain elusive in the newly discovered Fe-based alloys with nanostructures. Here we quantitatively elucidate the nucleation mechanism, evolution kinetics and hardening effects of the group-precipitated nanoparticles in the Fe-Cu-Ni-Al-based alloys by atom probe tomography together with both first-principles and thermodynamic calculations. Our results provide the compelling evidence for two interesting but complex group precipitation pathways of nanoparticles, i.e., the Cu-rich and NiAl-based precipitations. Lastly, the co-existence of the two precipitation pathways plays a key role in age hardening kinetics and ultimately enhances the hardening response, as compared to the single particle type of strengthening, therefore providing an effective new approach for strengthening materials for structural applications.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); City Univ. of Hong Kong (China)
Sponsoring Organization:
USDOE Office of Science (SC); City Univ. of Hong Kong (China); Research Grant Council, Hong Kong (China)
Grant/Contract Number:
AC05-00OR22725; 9380060; C1027-14E; 11205515
OSTI ID:
1259853
Alternate ID(s):
OSTI ID: 1335335
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

References (49)

The Future of Metals journal April 2010
Accelerated precipitation in the AFA stainless steel Fe–20Cr–30Ni–2Nb–5Al via cold working journal October 2014
Deformation mechanisms in a precipitation-strengthened ferritic superalloy revealed by in situ neutron diffraction studies at elevated temperatures journal January 2015
Atomic structure of nanoclusters in oxide-dispersion-strengthened steels journal October 2011
Origin of copper precipitation strengthening in steel revisited journal July 2005
A New Paradigm for Designing High-Fracture-Energy Steels journal October 2010
Nanoscale co-precipitation and mechanical properties of a high-strength low-carbon steel journal March 2011
The temporal evolution of the decomposition of a concentrated multicomponent Fe–Cu-based steel journal May 2008
Creep response and deformation processes in nanocluster-strengthened ferritic steels journal April 2008
Designing Heusler nanoprecipitates by elastic misfit stabilization in Fe–Mn maraging steels journal September 2014
Brittle intermetallic compound makes ultrastrong low-density steel with large ductility journal February 2015
New design aspects of creep-resistant NiAl-strengthened ferritic alloys journal March 2013
Advances in High Strength Steel Technology for Naval Hull Construction journal January 1993
Room temperature tensile properties of Fe-19wt.%Cr alloys precipitation hardened by the intermetallic compound NiAl journal December 1982
Coarsening and morphology of β′ particles in Fe-Ni-Al-Mo ferritic alloys journal May 1988
High-resolution electron microscopy studies of the structure of Cu precipitates in α-Fe journal July 1994
Structural changes of 9R copper precipitates in an aged Fe-Cu alloy journal March 2000
Interfacial segregation at Cu-rich precipitates in a high-strength low-carbon steel studied on a sub-nanometer scale journal February 2006
Precipitation in neutron-irradiated Fe–Cu and Fe–Cu–Mn model alloys: a comparison of APT and SANS data journal July 2003
Embrittlement of RPV steels: An atom probe tomography perspective journal September 2007
Synergistic effects of Cu and Ni on nanoscale precipitation and mechanical properties of high-strength steels journal September 2013
Creep-Resistant, Al2O3-Forming Austenitic Stainless Steels journal April 2007
Characterization of nanoscale NiAl-type precipitates in a ferritic steel by electron microscopy and atom probe tomography journal July 2010
Creep properties and microstructure of a precipitation-strengthened ferritic Fe–Al–Ni–Cr alloy journal June 2014
High-strength steels hardened mainly by nanoscale NiAl precipitates journal September 2014
Effects of Mn partitioning on nanoscale precipitation and mechanical properties of ferritic steels strengthened by NiAl nanoparticles journal February 2015
Aging characteristics and mechanical properties of 1600MPa body-centered cubic Cu and B2-NiAl precipitation-strengthened ferritic steel journal July 2014
Toroidal Lasing Spaser journal February 2013
Microstructure characterization of Cu-rich nanoprecipitates in a Fe–2.5 Cu–1.5 Mn–4.0 Ni–1.0 Al multicomponent ferritic alloy journal April 2013
Age-hardening effect and formation of nanoscale composite precipitates in a NiAlMnCu-containing steel journal March 2015
Precipitation mechanism and mechanical properties of an ultra-high strength steel hardened by nanoscale NiAl and Cu particles journal September 2015
Analysis of Three-dimensional Atom-probe Data by the Proximity Histogram journal September 2000
Identification of a Ni0.5(Al0.5−xMnx) B2 phase at the heterophase interfaces of Cu-rich precipitates in an α-Fe matrix journal December 2007
Site-distributions of Fe alloying additions to B2-ordered NiAl journal September 1999
Atomistic modeling of quaternary alloys: Ti and Cu in NiAl journal April 2002
The thermodynamics of hydride precipitation: The importance of entropy, enthalpy and disorder journal October 2014
Classification of Bulk Metallic Glasses by Atomic Size Difference, Heat of Mixing and Period of Constituent Elements and Its Application to Characterization of the Main Alloying Element journal January 2005
Fracture toughness of NiAl and NiAl-based composites journal June 1992
Effects of pre-strain on the compressive stress–strain response of Mo-alloy single-crystal micropillars journal October 2008
Effect of ternary elements on a martensitic transformation in β-NiAl journal May 2010
Temperature-dependent elastic anisotropy and mesoscale deformation in a nanostructured ferritic alloy journal October 2014
Design of Stable Nanocrystalline Alloys journal August 2012
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Projector augmented-wave method journal December 1994
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Generalized Gradient Approximation Made Simple journal October 1996
Special points for Brillouin-zone integrations journal June 1976
ATOM PROBE ANALYSIS OF β' PRECIPITATION IN A MODEL IRON-BASED Fe-Ni-Al-Mo SUPERALLOY journal November 1989

Cited By (2)

Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel journal August 2017
Kinetics of Early Decomposition Stages in Diluted bcc Fe–Сu–Ni–Al Alloy: MC+MD Simulation journal April 2019

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