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Estimation of grain boundary segregation enthalpy and its role in stable nanocrystalline alloy design

Journal Article · · Journal of Materials Research
DOI:https://doi.org/10.1557/jmr.2013.211· OSTI ID:1386990
 [1];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering
Grain boundary segregation provides a method for stabilization of nanocrystalline metals—an alloying element that will segregate to the boundaries can lower the grain boundary energy, attenuating the driving force for grain growth. The segregation strength relative to the mixing enthalpy of a binary system determines the propensity for segregation stabilization. This relationship has been codified for the design space of positive enthalpy alloys; unfortunately, quantitative values for the grain boundary segregation enthalpy exist in only very few material systems, hampering the prospect of nanocrystalline alloy design. We present a Miedema-type model for estimation of grain boundary segregation enthalpy, with which potential nanocrystalline phase-forming alloys can be rapidly screened. Calculations of the necessary enthalpies are made for ~2500 alloys and used to make predictions about nanocrystalline stability.
Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0001299
OSTI ID:
1386990
Alternate ID(s):
OSTI ID: 1160718
Journal Information:
Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 16 Vol. 28; ISSN 0884-2914
Publisher:
Materials Research SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (18)

Thermal Stability of Cryomilled Al-Mg-Er Powders journal January 2017
Simultaneous Enhancement of Mechanical and Magnetic Properties in Extremely-Fine Nanograined Ni-P Alloys journal October 2018
Achieving Ultrahigh Hardness in Electrodeposited Nanograined Ni-Based Binary Alloys journal April 2019
Achieving Ultralow Wear with Stable Nanocrystalline Metals journal June 2018
Nanocrystalline Materials at Equilibrium: A Thermodynamic Review journal September 2015
Extreme creep resistance in a microstructurally stable nanocrystalline alloy journal September 2016
Manipulating the interfacial structure of nanomaterials to achieve a unique combination of strength and ductility journal February 2016
Mechanical properties of stabilized nanocrystalline FCC metals journal September 2019
Thermal stability of nanocrystalline materials: thermodynamics and kinetics journal November 2016
Strain-stress relationship and dislocation evolution of W–Cu bilayers from a constructed n -body W–Cu potential journal May 2019
Lower bound on grain boundary solubility in immiscible alloys journal February 2019
Radiation tolerance of La-doped nanocrystalline steel under heavy-ion irradiation at different temperatures journal October 2018
Reducing Grain-Boundary Resistivity of Copper Nanowires by Doping journal May 2016
Higher Temperatures Yield Smaller Grains in a Thermally Stable Phase-Transforming Nanocrystalline Alloy journal October 2018
Thermodynamic stabilization of precipitates through interface segregation: Chemical effects journal September 2017
Structure of vacuum Cu–Ta condensates journal February 2017
Recent trends and open questions in grain boundary segregation journal July 2018
Coupled oxidation resistance and thermal stability in sputter deposited nanograined alloys journal November 2018

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