Premium
On the structure of α′ m ‐precipitates in Al‐Zn alloys
Author(s) -
Werner M.,
Löffler H.
Publication year - 1983
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170180406
Subject(s) - lattice (music) , materials science , alloy , zone axis , precipitation , crystallography , matrix (chemical analysis) , condensed matter physics , lattice constant , metallurgy , chemistry , composite material , diffraction , optics , electron diffraction , physics , acoustics , meteorology
The lattice parameter of the f.c.c. α′‐phase in an Al‐12at.% Zn alloy decomposed at ageing temperatures ranging between 170 °C and 210 °C was investigated by an analysis of Moiré fringe contrasts which appear inside the precipitates in the TEM‐micrographs. Additionally information was gained concerning the relationship between the corresponding lattice of the α′ m ‐precipitates and the matrix. The analysis proved that the misfit between the lattice of the α′ m ‐precipitates and the adjoining matrix is fairly small, namely less than 1.5% in lattice spacing and less than 1° in the angular rotation. From these results it was concluded that the major part of the matrix planes passes the precipitates without interruption.