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Novel casting CoCrNiAl eutectic high entropy alloys with high strength and good ductility
Ning Xu , , , , Yubo HuangYuxian CaoShilei LiYan-dong Wang
出版OAE Publishing Inc., 2023-02-27
主題Technology & Engineering / Materials Science / General
URLhttp://books.google.com.hk/books?id=b5X3EAAAQBAJ&hl=&source=gbs_api
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註釋Eutectic high-entropy alloys (EHEAs) have drawn increasing interest due to their fine castability as well as appealing properties in recent years. In this work, two bulk-casting Co20-x/3Cr20-x/3Ni50-x/3Al10+x (x = 8 and 9) EHEAs with regular L12/B2 lamellar morphologies were successfully fabricated and studied. Both EHEAs show high ultimate strength of ~1200 MPa combined with good uniform ductility (> 9%). Post-deformation transmission electron microscopy results indicated a high density of dislocations and stacking faults in the L12 lamellae, while no obvious dislocation in the B2 phases. This work can broaden the optimization of composition design in EHEAs and provide useful guidance for further development of CoCrNiAl EHEAs.