학술논문
On the existence of declared 9 R phase in Fe-Ni invar alloy.
Document Type
Article
Author
Source
Subject
*IRON-nickel alloys
*PHASE transitions
*NANOCRYSTALS
*ELECTRON diffraction
*TWINNING (Crystallography)
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Language
ISSN
1063-7745
Abstract
An analysis of recently reported electron diffraction patterns suggests that metastable austenitic Fe-32Ni alloy subjected to α → γ transformation upon slow heating does not exhibit any signs of formation of the 9 R phase; the conventional nanocrystalline γ phase with an fcc lattice is formed instead. Extended lamellae with a layered structure, erroneously identified as a new phase of the (3 R + 9 R) type in Fe-32Ni alloy, are conventional twinning (midrib) regions of each initial α crystal, in which γ-phase twin nanolamellae are formed upon heating. [ABSTRACT FROM AUTHOR]