Enhanced strength-ductility balance of the (CoCrFeNiMn)95.2Al3.2Ti1.6 high-entropy alloy by co-precipitation of the B2 and sigma phases
- Title
- Enhanced strength-ductility balance of the (CoCrFeNiMn)95.2Al3.2Ti1.6 high-entropy alloy by co-precipitation of the B2 and sigma phases
- Author
- 박주현
- Keywords
- High entropy alloy; Co-precipitation; Mechanical properties; Sigma phase
- Issue Date
- 2023-03-11
- Publisher
- ELSEVIER SCIENCE SA
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v. 873, NO 145039, Page. 1-8
- Abstract
- The present work investigated the effect of the co-precipitation of the B2 and & sigma; phases on the mechanical properties of the (CoCrFeNiMn)95.2Al3.2Ti1.6 high entropy alloy subjected to two-step annealing. The single-step annealed sample at 900 & DEG;C only showed B2 precipitates. Further annealing at 650 and 750 & DEG;C led to the co precipitation of & sigma; and B2 particles. The sizes and fractions of & sigma; and B2 particles increased with increasing annealing temperature. The sample subjected to the second annealing at 750 & DEG;C, with large sizes and fractions of co-precipitated & sigma; and B2 particles, exhibited high strength with maintaining moderate ductility (YS: 561 MPa, UTS: 1005 MPa, TE: 26%). The superior mechanical properties of the sample subjected to the second annealing at 750 & DEG;C could be owing to the co-precipitation hardening, back stress strengthening, joint activation of dislocation plasticity and deformation twinning. The present work offers a novel microstructure design to optimize the strength-ductility balance of high-entropy alloys via the co-precipitation of & sigma; and B2 particles.
- URI
- https://information.hanyang.ac.kr/#/eds/detail?an=S092150932300463X&dbId=edselphttps://repository.hanyang.ac.kr/handle/20.500.11754/190099
- ISSN
- 0921-5093
- DOI
- 10.1016/j.msea.2023.145039
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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