The influence of the direct quench and indirect quench to  T  a  >  T  h  on the decomposition behaviour of an Al‐2 at.% Zn‐1 at.% Mg alloy | Zendy

Wolter R. | Zendy; Fabian H.G. | Zendy; Czurratis P. | Zendy; Kroggel R. | Zendy

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The influence of the direct quench and indirect quench to T a > T h on the decomposition behaviour of an Al‐2 at.% Zn‐1 at.% Mg alloy

Author(s) -

Wolter R.,

Fabian H.G.,

Czurratis P.,

Kroggel R.

Publication year - 1990

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.2170250416

Subject(s) - isothermal process , nucleation , thermodynamics , decomposition , precipitation , homogeneous , materials science , electrical resistivity and conductivity , alloy , chemistry , analytical chemistry (journal) , metallurgy , physics , chromatography , organic chemistry , quantum mechanics , meteorology

The decomposition behaviour of an Al‐2.0 at.% Zn‐1.0 at.% Mg alloy after direct quench (DQ) and indirect quench (IQ: T a 1= 23 °C, t a 1 ) to the ageing temperature T a 2= 160 °C (above the temperature of the rapid homogeneous nucleation, T h ) was investigated by means of TEM and isothermal resistivity measurements. The precipitation density of the η‐particles yields a maximum value at pre‐ageing times about 10 min at T a 1= 23 °C. To clear up the reason for that phenomenon a loop‐formation and clustering model was introduced.

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