Dual-phase high-entropy alloys for high-temperature structural applications

作者：Lim Ka Ram^*; Lee Kwang Seok; Lee Jun Seo; Kim Jin Yeon; Chang Hye Jung; Na Young Sang^*

来源：Journal of Alloys and Compounds, 2017, 728: 1235-1238.

DOI：10.1016/j.jallcom.2017.09.089

• Casting
• Microscopy and microanalysis techniques
• High-entropy alloys
• Mechanical properties
• Phase transformations

The dual-phase AlCoCrFeNi alloy exhibits excellent specific strength in the 7730-873 K temperature range. However, the phase transformation taking place above 773 K hinders its structural use at higher temperatures. In the present study, the temperature dependence of the specific strength of the AlCoCrFeNi alloy has been examined from a microstructural point of view. One of the key findings of this work is that the high-temperature phase stability of the dual-phase alloy is strongly affected by its microstructural morphology; this finding provides new insights into the application of high-entropy alloys as high-temperature structural materials, for instance in aerospace engine components.

• 出版日期2017-12-25