Author:
Chen Yung-Ta,Chang Yao-Jen,Murakami Hideyuki,Sasaki Taisuke,Hono Kazuhiro,Li Chen-Wei,Kakehi Koji,Yeh Jien-Wei,Yeh An-Chou
Abstract
AbstractA hierarchical microstructure strengthened high entropy superalloy (HESA) with superior cost specific yield strength from room temperature up to 1,023 K is presented. By phase transformation pathway through metastability, HESA possesses a hierarchical microstructure containing a dispersion of nano size disordered FCC particles inside ordered L12 precipitates that are within the FCC matrix. The average tensile yield strength of HESA from room temperature to 1,023 K could be 120 MPa higher than that of advanced single crystal superalloy, while HESA could still exhibit an elongation greater than 20%. Furthermore, the cost specific yield strength of HESA can be 8 times that of some superalloys. A template for lighter, stronger, cheaper, and more ductile high temperature alloy is proposed.
Funder
Ministry of Science and Technology, Taiwan
Publisher
Springer Science and Business Media LLC
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