6533b86efe1ef96bd12cb560

RESEARCH PRODUCT

The Grain Boundary Wetting Phenomena in the Ti-Containing High-Entropy Alloys: A Review

Gregory GersteinAnna KornevaGabriel A. LópezBoris B. StraumalAlexei KuzminEugen RabkinA. S. GornakovaAlexander B. Straumal

subject

010302 applied physicsPhase transitionMaterials scienceMining engineering. MetallurgyHigh entropy alloysMetals and AlloysTN1-997Titanium alloyThermodynamics02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesphase transitionsContact anglePhase (matter)titanium alloys0103 physical sciencesgrain boundary wettingGeneral Materials ScienceGrain boundaryWetting0210 nano-technologyphase diagramsPhase diagramhigh-entropy alloys

description

In this review, the phenomenon of grain boundary (GB) wetting by melt is analyzed for multicomponent alloys without principal components (also called high-entropy alloys or HEAs) containing titanium. GB wetting can be complete or partial. In the former case, the liquid phase forms the continuous layers between solid grains and completely separates them. In the latter case of partial GB wetting, the melt forms the chain of droplets in GBs, with certain non-zero contact angles. The GB wetting phenomenon can be observed in HEAs produced by all solidification-based technologies. GB leads to the appearance of novel GB tie lines Twmin and Twmax in the multicomponent HEA phase diagrams. The so-called grain-boundary engineering of HEAs permits the use of GB wetting to improve the HEAs’ properties or, alternatively, its exclusion if the GB layers of a second phase are detrimental. This research was funded by the Russian Ministry of Science and Higher Education (contract no. 075-15-2021-945 grant no. 13.2251.21.0013). Support from the University of the Basque Country under the GIU19/019 project is also acknowledged.

yearjournalcountryeditionlanguage
2021-11-18
http://hdl.handle.net/10810/54224