Comparison of the structure and properties of equiatomic and non-equiatomic multicomponent alloys

ABSTRACT

A series of equiatomic and non-equiatomic Fex(NiCrCo)_100−x (at.-%, x = 25, 45, 55, 65, 75 and 85) multicomponent alloys were prepared and studied. With the increase in x, the phase structure of the alloys evolves from a single FCC phase (x = 25, 45 and 55), to a mixture of FCC and BCC phases (x = 55) and finally to a single BCC phase (x = 65 and 75). As a result, the BCC-structured alloys have much higher strength and hardness than the FCC-structured alloys. The existing VEC criteria are unable to predict the FCC-BCC phase transition in these alloys.

KEYWORDS:

• Multicomponent alloys
• structure
• properties
• phase transition

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (Nos. 50971051).