Synergy of tensile strength-ductility in IN718/CoCrFeMnNi/IN718 multi-material processed by powder high-pressure torsion and annealing
SCIE
SCOPUS
- Title
- Synergy of tensile strength-ductility in IN718/CoCrFeMnNi/IN718 multi-material processed by powder high-pressure torsion and annealing
- Authors
- Gu, Gang Hee; Heo, Yoon-Uk; Kwon, Hyeonseok; Ahn, Soung Yeoul; Son, Sujung; Asghari-Rad, Peyman; Kim, Hyoung Seop
- Date Issued
- 2023-03
- Publisher
- Pergamon Press Ltd.
- Abstract
- © 2022 Acta Materialia Inc.Materials manufactured through conventional powder metallurgy (PM) techniques generally exhibit inferior tensile properties due to structural defects. Nevertheless, a recently proposed cold-consolidation technique using powder high-pressure torsion represents well-manufactured structures with ultra-high tensile properties in the absence of cracks or pores. This novel PM-based technique is utilized in the present investigation to fabricate a multi-material Inconel 718/CoCrFeMnNi/Inconel 718 layered structure. By a combination of uttermost high densification, ultra-fine-grained microstructure, and hetero-deformation induced strengthening effect, the present cold-consolidated multi-material exhibits tensile properties with yield strength of 1255.4 MPa, uniform elongation of 13.7%, and total elongation of 25.0%, overcoming monolithic Inconel 718 and CoCrFeMnNi systems. These findings shed light on the capability of the cold-consolidation technique to manufacture multi-layered and gradient multi-functional structures with excellent mechanical response under tensile stress.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/115009
- DOI
- 10.1016/j.scriptamat.2022.115167
- ISSN
- 1359-6462
- Article Type
- Article
- Citation
- Scripta Materialia, vol. 225, page. 115167, 2023-03
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- There are no files associated with this item.
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