A high-entropy V35Ti35Fe15Cr10Zr5 alloy with excellent high-temperature strength

作者：Xian, Xin; Zhong, Zhihong^*; Zhang, Bowen; Song, Kuijing; Chen, Chang; Wang, Shan; Cheng, Jigui; Wu, Yucheng^*

来源：Materials and Design, 2017, 121: 229-236.

DOI：10.1016/j.matdes.2017.02.029

• High-entropy alloy
• Intermetallics
• Microstructure
• Strength
• Hardness

Low-activation structural materials for fusion applications beyond 700 degrees C are desired. High-entropy alloys (HEAs) with excellent properties at elevated temperatures are suitable for use in nuclear reactors. A newly developed V35Ti35Fe15Cr10Zr5 HEA was fabricated by vacuum arc melting and the microstructure of as-cast and annealed sample was found to be composed of BCC solid solution phases. It was interesting to find that the yield strength of as-cast V35Ti35Fe15Cr10Zr5 HEA increased with increasing the temperature below 500 degrees C, and it was much higher than that of vanadium alloy or martensitic steel for fusion reactors in the temperature range of room temperature to 900 degrees C. At 700 degrees C, the yield strength of V35Ti35Fe15Cr10Zr5 HEA was about 500 MPa higher than that of vanadium alloy or martensitic steel, showing promise for high temperature applications. V35Ti35Fe15Cr10Zr5 alloy had a relative low ductility below 700 degrees C, while the alloy exhibited a good ductility above 700 degrees C.

• 出版日期2017-5-5
• 单位合肥工业大学