A novel Fe20Co20Ni41Al19 eutectic high entropy alloy with excellent tensile properties

作者：Jin, Xi; Zhou, Yang^*; Zhang, Lu; Du, Xingyu; Li, Bangsheng^*

来源：Materials Letters, 2018, 216: 144-146.

DOI：10.1016/j.matlet.2018.01.017

• Metals and alloys
• Microstructure
• Mechanical properties
• Eutectic high entropy alloys

Eutectic high entropy alloys (EHEAs) are recently of great interest due to their excellent mechanical properties. However, only a few EHEAs have so far been designed because of the lack of multi-component phase diagrams. Here, a new Fe20Co20Ni41Al19 EHEA was successfully designed and studied. The alloy exhibited a nano-lamellar eutectic microstructure composed of ordered BCC (B2) phase and ordered FCC (L1(2)) phase. The room-temperature tensile strength and total elongation of the alloy were as high as 1103 MPa and 18.7%, respectively, which were better than those of a majority of as-cast high entropy alloys. The new alloy has a potential application in industry and will promote the further study of EHEAs.

• 出版日期2018-4-1
• 单位哈尔滨工业大学