4 results listed
Al–Si-Mg alloys are generally alloyed with supporting additions such as Ti, Zr or Be. Zirconium and titanium
are used as grain refiners [1-4]. Fakhraei et al. have been studied on improving the ductility of Al–8%Mg alloys by Al–
5Ti–1B master alloy [2]. This study consists grain refinement and heat treatment processes over A357 Al-Si-Mg alloy.
Grain refinement process have been carried out via addition of AlTi5B1 master alloy to the A357 alloy. A357 alloy was
melted and AlTi5B1 master alloy have been added to the liquid metal with three different weight proportions as %0.5, 1
and 1.5 at 740-750°C temperature range. A357 and AlTi5B1 materials’ chemical properties were illustrated in Table 1
International Symposium on Light Alloys and Composite Materials
UHAKS
Melik Çetin
Talha Sunar
Cellular materials and foams have desired mechanical and physical properties, and that makes them
functional in manufacturing industry. The casting of metals and alloys around space holder material is very
economical way to obtain metallic foams or cellular parts [1]. In this study, vacuum casting setup was designed.
NaCl as a space holder material and dissolution technique was used for foaming of the A360 aluminum metal. As
space holder materials NaCl particles were selected and mixed with B4C powders to produce A360 (AlSi10Mg)
aluminium-B4C composite foam. By adding the B4C particles with the weight ratio of %1, the alteration of the
properties such as compression strength, density and porosity were investigated. Density strength relations were
determined depending on the NaCl particle size. Compression test was used to evaluate the foam behavior under
static loading. Optimum vacuum conditions for the successful foam production by infiltrating the liquid melt
between the NaCl particles were determined. It was concluded that vacuum casting can be used to produce open
cell aluminum foam by integrating of NaCl dissolution process.
International Symposium on Light Alloys and Composite Materials
UHAKS
Talha Sunar
Melik Çetin
In this study, vacuum-gas infiltration setup was used to produce aluminium-B4C composite foam. The mentioned method involves addition of space holder materials and a dissolution technique to remove them after solidification of the metal. As space holder materials NaCl particles were selected and mixed with B4C powders to produce A360 (AlSi10Mg) aluminium-B4C composite foam. By changing the weight ratio of B4C particles, the alteration of the properties such as compression strength, density and porosity were investigated. Additionally, computer tomography views were obtained to see and interpret the section views of the alloy and composite foam. Compression tests were carried out to evaluate the mechanical behaviour of the foams under static loading. Results show that, the metal foam with % 0.5 B4C reinforcement has the greatest compression strength and the alloy foam has the lowest compression strength. The ceramic content especially %0,5, increased the compressive strength and the toughness of the foam.
International Conference of Advanced Materials and Manufacturing Technologies
ICAMT
Fuat Medik
Talha Sunar
Melik Çetin
Mustafa Yasar
Levent Turhan
In this work Cu-Zn-Sn alloy which shows shape retention property was chosen and tested to determine shape retention and other properties. Firstly, elements of the alloy were mixed in required proportions (Cu-%30Zn-%5Sn). The alloy was melted in 1100ºC. Then the product was exposed directly to sudden cooling over the melt spinning unit while it is still melt. Thus, the formation of martensite phase was provided in the microstructure of alloy. The specimens were heat treated at different temperatures and examined for shape memory. The microstructures of the specimens were examined by optical, scanning electron microscopy (SEM) and X-ray microanalyses by EDX. SEM and X-Ray results show that the material constitutes β'-phase and meanwhile by means of plane that was seen in analyse of diffraction x-ray pattern it was held down that the material has 18R and 9R orthorhombic crystal structure.
International Conference of Advanced Materials and Manufacturing Technologies
ICAMT
Talha Sunar
Melik Çetin