| Autor: |
Choo, Woong K., Kim, Dong G. |
| Zdroj: |
Metallurgical and Materials Transactions A; May 1987, Vol. 18 Issue: 5 p759-766, 8p |
| Abstrakt: |
Phase changes that occur in melt spun high carbon Fe-Ni-Al-C alloys are investigated by X-ray diffraction and transmission electron microscopy. A typical modulated crystal structure along the elastically soft 〈100〉 directions was observed in the transmission electron micrographs coinciding with the development of sidebands in the vicinity of the X-ray diffraction main peaks. The modulation wavelength increases with the increasing ribbon thickness, indicating that the modulated domains coarsen to a larger extent in the more slowly cooled specimens. The intensity of odd (h + k + l) superlattice spots is much stronger than that of even (h + k + l) superlattice spots. This is attributed to theL’′12type ordering in carbon rich domains of the modulated structure of as-solidified specimens. After brief heat treatment, these alloys developed an unusual lamellar duplex microstructure made up of perovskite carbide and ferrite plates. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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