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Isothermal Ageing in the T Range from 0°C to 180°C of a Technical Al‐2.0 at.% Zn‐1.3 at.% Mg Alloy after Direct Quench
Author(s) -
Gerlach R.,
Löffler H.
Publication year - 1982
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.2170170113
Subject(s) - isothermal process , nucleation , decomposition , alloy , impurity , indentation hardness , materials science , atmospheric temperature range , crystallography , phase (matter) , hexagonal crystal system , ageing , analytical chemistry (journal) , metallurgy , thermodynamics , chemistry , microstructure , chromatography , physics , genetics , biology , organic chemistry
The variations of the structure and the mechanical properties had been investigated by means of TEM investigations and determination of the microhardness number in the T a range between 0 °C and 180 °C. The main results are the following: – At the starting period of the isothermal ageing an incubation time, t inc , occurs. t inc plotted versus T a yields two intersecting C curves at about 100 °C. – At T a = 70 °C the only decomposition product are G.P. zones. – At 70 °C