https://scholars.lib.ntu.edu.tw/handle/123456789/598374
標題: | Enhancement in mechanical properties through an FCC-to-HCP phase transformation in an Fe-17.5Mn-10Co-12.5Cr-5Ni-5Si (in at%) medium-entropy alloy | 作者: | Lin K Chen S.-C HSIN-CHIH LIN HUNG-WEI YEN |
關鍵字: | Mechanical property;Medium-entropy alloy;Phase transformation;Strengthening mechanism;Chromium alloys;Cobalt alloys;Cold rolling;Entropy;High-entropy alloys;Hot rolling;Iron alloys;Manganese alloys;Tensile strength;Tensile testing;Yield stress;Face-centered cubic phasis;Face-centred cubic;Hexagonal close packed;Hexagonal close-packed;High entropy alloys;Low-costs;Medium entropy;Phases transformation;Strengthening mechanisms;Phase transitions | 公開日期: | 2022 | 卷: | 898 | 來源出版物: | Journal of Alloys and Compounds | 摘要: | The present work focuses on developing a low-cost medium entropy alloy (MEA) with desirable mechanical properties according to the benchmark CoCrFeMnNi high entropy alloy (MEA). By adjusting the ratio of each component and adding silicon to the system, the Fe50Mn17.5Cr12.5Co10Ni5Si5 MEA with a single face-centered cubic (FCC) phase was developed. After homogenization, hot rolling, cold rolling, and annealing, fully recrystallized MEA specimens with grain sizes ranging from 10 ?m to 149 ?m were used for tensile tests. The microstructure of the elongated MEAs showed a ?-martensite transformation from the FCC phase to the hexagonal close-packed (HCP) phase, indicating the stacking fault energy (SFE) of the MEA was significantly reduced. The room-temperature deformed MEA showed improved mechanical properties in yield strength and tensile strength than the CoCrFeMnNi MEA. Meanwhile, the volume fraction of the HCP phase in cryogenic-deformed MEA is much larger than that in room-temperature deformed MEA; its yield strength was increased by two times, while the tensile strength exceeded the level of 1 GPa. ? 2021 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121126767&doi=10.1016%2fj.jallcom.2021.162765&partnerID=40&md5=c40e8aba674b9b6aeca74d55e248b45b https://scholars.lib.ntu.edu.tw/handle/123456789/598374 |
ISSN: | 09258388 | DOI: | 10.1016/j.jallcom.2021.162765 |
顯示於: | 材料科學與工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。