الفهرس 
Chapter 1 : IntroductionOnly 14 pages are availabe for public view
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Abstract
In the present study, an experimental investigation was erformed for the creep behaviour of the dispersion strengthened lumini urn alloys.
Creep tests under constant loads were carried out on roduced by Cold Isostatic Pressing (CIP) after the mechanical iioying of the blend . Only one group AlC202 was produced by one
of oxygen and carbon as a despersoid material The majority of the creep tests were carried out at 300°Co , was carried out at 500 C too.
It was concluded that .the presence of oxide and carbide in aluminium alloys with percentages up to 2% of each of them hase a great effect on the creep properties in comparison with the addition of the other alloying elements in high percentages.
Creep rupture properties of these alloys were characterized in terms of the stress and temperature dependence of the minimum creep strain rate , £min ~ rupture lives, tR and creep rate parameter , a , which is defined as the current value of the creep strain rate at a time of 1 h Within the stress ranges used in ° this work the stress dependence of both £min and tR at 300 e
400°C and 5000e can be represented by power laws £min = eon and tR = M a-P ; where C , M , nand p are constants
A simpel equation has been derived to describe the dependency of the creep rate parameter on the applied creep stress for all the tested materials at every creep temperature. It was found that the rupture life and the minimum creep strain rate are considerably improved by increasing the volume fraction of oxygen and carbon , but , the ductility of these products is highly reduced . Effect of the manufacturing process of the dispersion hardened aluminium alloys ( AIC202) on the creep properties° tR ’ a ) at 500 C were represented.