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Effect of overheating treatment on the microstructure of NiAl-based alloy
- Source :
-
Materials Letters . Aug2010, Vol. 64 Issue 15, p1707-1709. 3p. - Publication Year :
- 2010
-
Abstract
- Abstract: The effect of melt overheating treatment on the microstructure of the alloy NiAl–28Cr–5.9Mo–0.1Hf(at.%)–0.05Ho(wt.%) has been investigated. Overheating treatment resulted in the decrease of the amount of primary NiAl from 12% in the normal sample to 8% in the overheated sample and in the refinement of NiAl/Cr(Mo) lamellar. The size of eutectic cell was increased from 37μm to 63μm after the treatment. Another significant change of the microstructure was the morphological instability of precipitates: the morphology of Cr(Mo) precipitates in primary NiAl was dendritic in the normal alloy but was cubic/spherical in the overheated alloy. The mechanisms responsible for these changes were discussed. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 0167577X
- Volume :
- 64
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Materials Letters
- Publication Type :
- Academic Journal
- Accession number :
- 51810255
- Full Text :
- https://doi.org/10.1016/j.matlet.2010.05.011