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Nano-graining a particle-strengthened high-entropy alloy
- Authors
- Lee, Dong-Hyun; Park, Jeong-Min; Yang, Guanghui; He, Junyang; Lu, Zhaoping; Suh, Jin-Yoo; Kawasaki, Megumi; Ramamurty, Upadrasta; Jang, Jae-il
- Issue Date
- Apr-2019
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- High-entropy alloy; Particle strengthening; Grain boundary strengthening; High-pressure torsion; Nanoindentation
- Citation
- SCRIPTA MATERIALIA, v.163, pp.24 - 28
- Indexed
- SCIE
SCOPUS
- Journal Title
- SCRIPTA MATERIALIA
- Volume
- 163
- Start Page
- 24
- End Page
- 28
- ISSN
- 1359-6462
- Abstract
- The possibility of further enhancing the strength of a (CoCrFeNi)(94)Ti2Al4 high-entropy alloy (HEA), which is already strengthened by Ni-3(Ti,Al) second-phase particles, by grain refinement through high-pressure torsion (HPT) is examined. Concomitant with nanograin formation, HPT was found to induce particle dissolution and structural transformation of the remnant particles. Nanoindentation experiments of nanocrystalline HEA, with and without particles in the pre-HPT microstructure, suggests that grain boundary strengthening is the dominant strengthening mechanism.
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Related Researcher
- Jang, Jae Il
- COLLEGE OF ENGINEERING (SCHOOL OF MATERIALS SCIENCE AND ENGINEERING)