Akademik Veri Yönetim Sistemi
International Mediterranean Natural Sciences, Health Sciences and Engineering Congress (MENSEC), Budapest, Macaristan, 10 - 12 Eylül 2019, cilt.3, ss.33-38
Rapid solidification process for the manufacture of metallic alloys
mechanical properties markedly the same composition is better than
conventionally solidified alloy. Increased solid solubility limit and better
distribution of secondary phases in alloys due to rapid solidification that
improves mechanical properties. Moreover, it is possible to fabricate
metastable samples such as, amorphous, nano-crystals and quasi-crystals alloys
by cooling metallic melts at cooling rates over the 104 Ks−1.
On the other hand, Al-Ni based alloys are widely used in automobile, aircraft
and weapons industry due to their high mechanical properties, light weight,
good portability and excellent corrosion resistance. The
physical properties of Al-Ni alloy are being developed with the help of
alloying elements such as Si, Cu, Zr, etc. In this study, the effect of rapid
solidification production method on the microstructural and mechanical
properties of Al–3Ni-3Sb alloys was investigated. The Al–3Ni-3Sb samples
were produced by the ingot casting and melt spinning methods at 20 m/s. The
morphologies of the alloys were analyzed by optic microscopy (OM) and the phase
structures were examined by X-ray diffractometry (XRD). The microstructure has
significantly changed with rapid solidification; the microstructures changed
from transformed into smaller dendrites and particles than larger rods and
dendrites with rapid solidification process. The X- ray diffraction patterns of
the melt spun samples at 20 m/s showed Al3Ni and AlSb and the α–Al
phases. The mechanical properties of the ingot and melt-spun alloy was measures
Vickers micro-hardness test method. The
microhardness values of the rapidly solidified sample were about 2.4 times
higher than those of ingot counterpart sample.