Premium
Partial Reversion of Small GP Zones in an Al–Zn Binary Alloy
Author(s) -
Okuda H.,
Tanaka M.,
Osamura K.,
Amemiya Y.
Publication year - 1997
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889897001374
Subject(s) - radius , reversion , materials science , small angle x ray scattering , synchrotron radiation , alloy , crystallography , dissolution , scattering , synchrotron , binary number , condensed matter physics , chemistry , optics , metallurgy , physics , biochemistry , computer security , arithmetic , mathematics , computer science , gene , phenotype
The reversion process of very small Guinier‐Preston (GP) zones in Al–Zn binary alloys has been studied by time‐resolved synchrotron‐radiation small‐angle X‐ray scattering (SR‐SAXS) measurements. Al–15 at.% Zn alloys with GP zones of 1.0 to 1.3 nm in radius formed by aging at 274 K were up‐quenched up to 463 K. During reversion, the Guinier radius increased rapidly while the integrated intensity decreased. This rapid increase of the radius was completely different from what was found during the reversion of larger GP zones above the miscibility gap. It is concluded that a process of simultaneous dissolution and coarsening has been observed.