Influence of compositional complexity on interdiffusion in Ni-containing concentrated solid-solution alloys
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
- 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
Web of Science
A Mystery of "Sluggish Diffusion" in High-Entropy Alloys: The Truth or a Myth?
|
journal | July 2018 |
Similar Records
Impact of alloy composition on one-dimensional glide of small dislocation loops in concentrated solid solution alloys
Intrinsic properties and strengthening mechanism of monocrystalline Ni-containing ternary concentrated solid solutions