논문 해외 국제전문학술지(SCI급) Influence of reduction ratio on the microstructural evolution and subsequent mechanical properties of cold-drawn Co10Cr15Fe25Mn10Ni30V10 high entropy alloy wires
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2020-02
- 저자명 김정한,조한솔,이광석,나영상,이동근,배성준
- 학술지명 JOURNAL OF ALLOYS AND COMPOUNDS
- 발행처명 ELSEVIER SCIENCE SA
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 6
홈페이지논문 초록 (Abstract)
Influence of multi-pass reduction on the microstructural evolution and subsequent mechanical properties of a senary non-equiatomic Co10Cr15Fe25Mn10Ni30V10 (atomic %) high-entropy alloy was investigated. HEA rods obtained from a Y-block casting were cut, caliber rolled, annealed, and then produced into wires with of varying diameters by cold drawing at room temperature. The maximum reduction ratio of 96% was successfully used to manufacture 1-mm diameter wire. This resulted in a maximum tensile strength of 1.6 GPa without breakage during cold drawing. Both electron back-scatter diffraction (EBSD) and transmission electron microscopy (TEM) examination revealed that nano-scale ultrafine grains and deformation twins were generated by the multi-step drawing process. This phenomenon suggests that nano-twinning rather than grain refinement is dominant mechanism required for achieving high-strength in the Co10Cr15Fe25Mn10Ni30V10 senary high entropy alloy. (C) 2019 Elsevier B.V. All rights reserved.