We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Microstructure Investigation of Directionally Solidified NiAl-Cr(Mo)- xDy ( x = 0, 0.1 wt.%) Hypereutectic Alloys at Different Withdrawal Rates.
- Authors
Wang, Lei; Shen, Jun; Shang, Zhao; Zhang, Jian-Fei; Du, Yu-Jun; Fu, Heng-Zhi
- Abstract
The microstructures of directionally solidified Ni-31Al-32Cr-6Mo (at.%)- xDy ( x = 0, 0.1 wt.%) hypereutectic alloys were studied at different withdrawal rates. The results show that the microstructure changes from the planar eutectic to the cellular eutectic and the volume fraction of the primary Cr(Mo) dendrites decreases for the Dy-free alloy with the withdrawal rate varying from 6 μm/s to 30 μm/s. The addition of 0.1 wt.% Dy promotes the planar-to-cellular transition. Moreover, the white Dy-containing phase does not form in the alloy for the planar interface growth (6 μm/s), but it can occur in the boundary of eutectic cells for the cellular interface growth (30 μm/s). A sketchy model of the planar and cellular growth is supposed to interpret it.
- Subjects
HYPEREUTECTIC alloys; CONSTITUTION of matter; EUTECTICS; SOLIDIFICATION
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2013, Vol 65, Issue 11, p1419
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-013-0734-9