Premium
On the decomposition behaviour of Al‐Zn(4.5 at.%)‐Mg(2;3 at.%) alloys during continuous cooling from the temperature range of homogeneity
Author(s) -
Radomsky M.,
Kabisch O.,
Löffler H.,
Sackewitz K.H.,
Honyek G.,
Ungár T.,
Lendvai J.,
Kovács I.
Publication year - 1979
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19790140517
Subject(s) - isothermal process , alloy , decomposition , materials science , thermodynamics , homogeneity (statistics) , atmospheric temperature range , electrical resistivity and conductivity , metallurgy , phase (matter) , analytical chemistry (journal) , chemistry , physics , chromatography , organic chemistry , statistics , mathematics , quantum mechanics
The decomposition processes taking place in the Al‐Zn (4.5)‐Mg(2;3) alloys were studied by means of XSAS and resistivity measurements and by TEM investigations after continuous slow cooling to certain temperatures T i and during an isothermal ageing at T i following the continuous cooling procedure. During the cooling between 380 °C and 320 °C mostly particles of the η‐phase are growing. The formation of particles homogeneously distributed in the matrix starts at 165 °C in the alloy with 2 at.% Mg and at 175 °C in the one with 3 at.% Mg. Below these temperatures new subcritical GP zones are formed and particles already present in the matrix are growing. The dominating process depends on T i .