Journal
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
Volume 25, Issue 11, Pages 1286-1293Publisher
SPRINGER
DOI: 10.1007/s12613-018-1681-9
Keywords
multicomponent equiatomic; high-entropy alloys; microstructure; oxidation resistance
Categories
Funding
- National Natural Science Foundation of China [51564005]
- Program for the Distinguished Young Scientific Talents of Guizhou [(2017) 5633]
- New Process Engineering Research Center of Process industry, Guizhou Province [(2017) 021]
- Key Laboratory of Light Metal Materials Processing of Guizhou Province [[2016]5104]
- Scientific&Technological Innovation Talent Team of Guizhou Province [[2015]4008]
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CoCrCuFeNi-TiO was prepared by arc melting of the pure elements and Ti2CO powder under an Ar atmosphere. Both CoCrCu-FeNi and CoCrCuFeNi-TiO alloys are composed of a face-centered cubic (fcc) solid solution, whereas the alloys of CoCrCuFeNi-TiO are basically composed of an fcc solid solution and TiO crystals. The microstructures of CoCrCuFeNi-TiO are identified as dendrite and interdendrite structures such as CoCrCuFeNi. The morphology of TiO is identified as an equiaxed crystal with a small amount of added Ti2CO. By increasing the amount of Ti2CO added, the TiO content was dramatically increased and part of the equiaxed crystals changed to a dendrite structure. A test of the oxidation resistance demonstrates that the oxidation resistance of CoCrCuFeNi-TiO is better than that of CoCr-CuFeNi. However, as the TiO content increases further, a corresponding decrease is observed in the oxidation resistance.
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