Research Information System
Turkeytrib 2020, İstanbul, Turkey, 17 - 19 December 2020, pp.26-32
Aluminum alloys have a
very important place in industries such as aviation and automotive. Various
alloy researches originating from this great importance started a long time ago
and have continued to increase until today. Ball alloys and mechanical alloys
have been used to produce modern alloys for the past sixty years [1]. In this
study, in order to meet the need of modern alloys, the characteristics of Al
alloy with different amount of Cu additives were examined by following the ball
milling rules in the device working with spex manner.
Homogeneous mixing of Al, varying amounts of Cu, Mg
and Zn metal powders and SiC ceramic powders and mechanical alloys of metal
powders by using high energy ball milling were carried out in the Retsch MM 400
model mixer device, which performs movement in a spex manner. After this process, X-ray diffraction (XRD)
was applied to the powdered mixtures. With the data obtained from XRD graphics;
The crystal size was calculated using the Scherrer equation, and the lattice
stresses were calculated using the Williamson-Hall equation and comparisons
between these two data were made.
It was observed that the amount of Cu by weight, both
the crystal size and the lattice strain data, did not make a notable change for
these properties. Then, powder mixtures were sintered in hot isostatic press in
argon atmosphere, which is a shielding gas, and turned into samples. These
samples were polished and scanning electron microscopy (SEM) images were taken.
In addition, these samples were compared by making Vickers micro-hardness
measurements.