| Autor: |
Lin, Mei, Lu, Jianlin, Chen, Yiming, Yang, Zhongsheng, Liu, Xin, Zhang, Kaiwei, Wang, Zhijun, Li, Junjie, Wang, Jincheng, He, Feng |
| Předmět: |
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| Zdroj: |
Materials Research Letters; Mar2024, Vol. 12 Issue 3, p172-179, 8p |
| Abstrakt: |
The metastable-stable transition and rapid coarsening of metastable D022 phase remains its Achilles hell, restricting the application of D022-strengthened alloys at service temperatures higher than 650°C. Hence, it is crucial to improve thermal stability of D022 phase. In this work, we report an 800°C-stable D022-Ni3(W0.24Ti0.38Ta0.19Nb0.19) superlattice in the Ni58Cr23Fe10W5Ti2Ta1Nb1 MEA. Experimental results and theoretical analysis showed that the exceptional thermal stability is due to Nb-sublattice occupying elements, low diffusivity of W, and extremely small lattice misfit between the D022 phase and FCC matrix. These findings shed lights on developing high-performance D022-hardened alloys capable of operating at temperatures above 650°C. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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