TiC-reinforced CoCrFeMnNi composite processed by cold-consolidation and subsequent annealing

[Display omitted] •Powder metallurgy-based fabrication route to produce HEA-matrix composites.•Cold consolidation using high-pressure torsion.•High densification of 99.5% and uniform distribution of TiC nanoparticles.•High hardness due to full densification, nano-grained HEA-matrix, and TiC particle...

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Bibliographic Details
Published inMaterials letters Vol. 303; p. 130503
Main Authors Asghari-Rad, Peyman, Nguyen, Nhung Thi-Cam, Kim, Yongju, Zargaran, Alireza, Sathiyamoorthi, Praveen, Kim, Hyoung Seop
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.11.2021
Elsevier BV
Subjects
Annealing
Cold-consolidation
Consolidation
Densification
Grain growth
Hardness
High entropy alloys
Materials science
Nanoparticles
Powder metallurgy
Titanium carbide
High-entropy alloys
Cold-consolidation
Grain growth
Powder metallurgy
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Summary:[Display omitted] •Powder metallurgy-based fabrication route to produce HEA-matrix composites.•Cold consolidation using high-pressure torsion.•High densification of 99.5% and uniform distribution of TiC nanoparticles.•High hardness due to full densification, nano-grained HEA-matrix, and TiC particles. Nanostructured CoCrFeMnNi high-entropy alloy (HEA) reinforced with TiC nanoparticles was fabricated through cold-consolidation using high-pressure torsion followed by annealing. The microstructural and hardness evolutions of the HEA-TiC composite have been compared with the monolithic HEA sample (without TiC) fabricated by a similar route. The HEA-TiC composite with high densification of 99.5% and uniform distribution of TiC nanoparticles showed retarded grain growth due to the pinning effect and enhanced hardness compared to monolithic HEA. The HPT cold consolidation fabrication route can be utilized to produce various HEA-matrix composites.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.130503