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Title: Influence of compositional complexity on interdiffusion in Ni-containing concentrated solid-solution alloys

Journal Article · · Materials Research Letters
 [1];  [2];  [2]; ORCiD logo [1]
  1. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
  2. CompuTherm LLC, Middleton, WI, USA

To investigate the compositional effects on thermal-diffusion kinetics in concentrated solid-solution alloys, interdiffusion in seven diffusion couples with alloys from binary to quinary is systematically studied. The alloys with higher compositional complexity exhibit in general lower diffusion coefficients against homologous temperature, however, an exception is found that diffusion in NiCoFeCrPd is faster than in NiCoFeCr and NiCoCr. While the derived diffusion parameters suggest that diffusion in medium and high entropy alloys is overall more retarded than in pure metals and binary alloys, they strongly depend on specific constituents. The comparative features are captured by computational thermodynamics approaches using a self-consistent database.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1483309
Alternate ID(s):
OSTI ID: 1424448
Journal Information:
Materials Research Letters, Journal Name: Materials Research Letters Vol. 6 Journal Issue: 5; ISSN 2166-3831
Publisher:
Informa UK LimitedCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (1)

A Mystery of "Sluggish Diffusion" in High-Entropy Alloys: The Truth or a Myth? journal July 2018


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