|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High Entropy Alloys IV
||Tailoring the Microstructure and Mechanical Properties of a CoCrFeNi High Entropy Alloy by Supercooling Method
||Jinshan Li, Wenjuan Jia, Jun Wang, Hongchao Kou
|On-Site Speaker (Planned)
The supercooling method adopting glass fluxing combined with cyclic heating is used to obtain supercooling up to 300K in a CoCrFeNi high entropy alloy (HEA) with large mass above 100g. Results show that the microstructure, phases and mechanical properties of the non-equilibrium solidified CoCrFeNi alloy from the supercooled melt are strongly different from the traditional cast alloys. The grain size of the undercooled samples becomes smaller with the increasing undercooling. Moreover, the phases transforms from FCC to the mixture of FCC and BCC structure with the increasing undercooling. The compressive yield strength of the supercooled high entropy alloy is shown to be strongly increased 3 times: from 137 MPa at traditional cast condition to 455 MPa for the sample processed at large undercooling. Our research results show that supercooling technique can be a quite efficient way to modify the microstructure and improve the mechanical properties of high entropy alloys.
||Planned: A print-only volume