Al-Mg-Si Alloys: Micostructure, Hardness and Tensile Properties

Al-Mg-Si Alloys: Micostructure, Hardness and Tensile Properties

TEM Studies of Microstructure in Relation to Hardness and Ductility in Al-Mg-Si (6xxx) Alloys

LAP Lambert Academic Publishing ( 14.09.2010 )

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Two different solution heat treatments were used to study precipitation in two 6xxx (Al-Mg-si) dispersoid-free-alloys with composition: 0.721 at % Si, 0.577 at % Mg and 0.57 at %Si 0.72 at % Mg. The relation between their microstructure and macroscopical properties such as hardness and ductility has been investigated. Tensile tests, hardness measurements, electrical conductivity sigma tests, grain size measurements in optical microscope and microstructure characterization in Transmission Electron Microscope (TEM) have all been done. The effect of alloy composition and solution heat treatment temperature and time on the microstructure and the resulting macroscopical properties (hardness, yield stress, tensile strength and ductility) was investigated. The results indicate that when alloy A3 is solution treated at 520°C for 10 minutes and then annealed for 3 hours at 175°C, its hardness, yield stress and tensile strength as well as ductility is optimised i.e.A3 has better mechanical properties and low cost of production at these conditions. It has been proved that the strengthening was solely due to precipitation particles and not grain size.

Kitap detayları:

ISBN-13:

978-3-8383-2922-2

ISBN-10:

3838329228

EAN:

9783838329222

Kitabın dili:

English

Yazar:

MAXWELL MAGETO

Sayfa sayısı:

116

Yayın tarihi:

14.09.2010

Kategori:

Fizik, astronomi