THE EFFECT OF GAS PRESSURE ON POWDER SIZE AND MORPHOLOGY IN THE PRODUCTION OF AZ91 POWDER BY GAS ATOMIZATION METHOD
Küçük Resim Yok
Tarih
2018
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Polska Akad Nauk, Polish Acad Sciences, Inst Metall & Mater Sci Pas
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, the effect of gas pressure on the shape and size of the AZ91 alloy powder produced by using the gas atomization method was investigated experimentally. Experiments were carried out at 820 degrees C constant temperature in 2-mm nozzle diameter and by applying 4 different gas pressures (0.5, 1.5, 2.5 and 3.5 MPa). Argon gas was used to atomize the melt. Scanning electron microscope (SEM) to determine the shape of produced AZ91 powders, XRD, XRF and SEM-EDX analysis to determine the phases forming in the internal structures of the produced powders and the percentages of these phases and a laser measuring device for powder size analysis were used. Hardness tests were carried out to determine the mechanical properties of the produced powders. The general appearances of AZ91 alloy powders produced had general appearances of ligament, acicular, droplet, flake and spherical shape, but depending on the increase in gas pressure, the shape of the powders is seen to change mostly towards flake and spherical. It is determined that the finest powder was obtained at 820 degrees C with 2 mm nozzle diameter at 3.5 MPa gas pressure and the powders had complex shapes in general.
Açıklama
Anahtar Kelimeler
Gas atomization, AZ91 alloy powder, gas pressure, powder morphology
Kaynak
Archives of Metallurgy and Materials
WoS Q Değeri
Q4
Scopus Q Değeri
Q4
Cilt
63
Sayı
4
