Short review on high entropy alloys for high temperature structural applications

ABSTRACT

High-entropy alloys (HEAs), also referred to as multi-principal elemental alloys, are the newest group of advanced materials that has emerged with the concept of novel alloy design. Near-equal atomic ratio of multi-principal elemental parts is the basis for the design of HEAs whereas mostly 1 or 2 principal elements are used for design of conventional alloy. For a wide range of structural applications, many various compositions in large number with a different combination of promising properties are derived from the emergence of HEAs. The strength and sluggish diffusion at elevated temperature are the two main features among various properties of HEAs which have attracted the attention of the materials researcher community. The new novel materials for superior high-temperature properties need to be developed for the high-temperature applications as compared to superalloys which is a major concern for the materials researcher group. From this paper, HEAs have promised to be a coming generation high-temperature materials which can be the replacement of Ni-based superalloys. High-temperature mechanical properties, microstructural stability, and phase stability of HEAs are the main focus of this review paper and also this state-of-the-art review will be of benefit to understand HEAs for high-temperature applications.

KEYWORDS:

• High entropy alloys
• XRD
• microstructure
• mechanical strength
• structural use

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the The author would like to acknowledge the support from Smart Healthcare, IDRP, Indian Institute of Technology Jodhpur.