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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2022.2
- 수록면
- 448 - 455 (8page)
- DOI
- 10.1007/s12540-021-01059-7
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초록· 키워드
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A new lightweight, refractory high entropy alloy (HEA), CrNbTa0.25TiZr,was prepared by arc-melting under a vacuumcondition. The as-cast and annealed CrNbTa0.25TiZrpossessed identical dual-phase components: a BCC + a cubic Lavesphase. After annealing, the Laves phase matrix in the as-cast alloy was replaced by the BCC phase, possibly due to the diffusionof Cr, which have a much smaller atomic radius than the other principal elements. From a performance perspective,the yield strength significantly increased from 926 MPa of the as-cast HfNbTaTiZr to 1800 MPa and 1500 MPa for as-castand annealed CrNbTa0.25TiZr,while its density (7.25 g/cm3) is only 73% of HfNbTaTiZr. The microstructure evolution ofthe stiff cubic Laves phase is highlighted to unveil the promising strength of the CrNbTa0.25TiZr.
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