The effect of processing parameters on Ultrasonic degassing Haghayeghi, P. Kapranos, “The effect of processing parameters on Ultrasonic degassing” , Materials letters, Vol.116, 2014, PP.399-401. The paper describes studies on the effect of high intensity ultrasonic treatment on degassing of AA7075.Different ultrasonic parameters, such as frequency, power, melt temperature and processing time were…
Solidification of Pb-Sn alloys under Ultrasonic Field Haghayeghi, P.Kapranos, “Solidification of Pb-Sn alloys under Ultrasonic Field”, Materials letters, Vol.126, 2014, PP.244-248. Grain size reduction and improved material homogeneity through ultrasonic treatment of a melt are well-established facts; however, the mechanisms responsible for cavitation aided grain refinement are still not well understood. For an…
Work Hardening of Al-1%Mg by Equal Channel Angular Pressing Haghayeghi, P. Kapranos, “Work Hardening of Al-1%Mg by Equal Channel Angular Pressing”, Materials Letters, Vol.129, 2014, PP.182-184. When Equal Channel Angular Pressing (ECAP)was performed on an Al–1 wt%Mg alloy, it was noticed that at ultrafine grain sizes (less than1 μm) the material did not…
Grain Refinement Efficiency by Shearing Above and Below the Liquidus Haghayeghi, P.Kapranos, “Grain Refinement Efficiency by Shearing Above and Below the Liquidus”, Solid state phenomena, Vol.217-218, 2015, PP.23-28. There is a debate whether grain refinement is more effective when shearing above or below the liquidus. In this work, examination of the microstructural evolution…
Write By Reza Haghayeghi : Abstract. Melt Conditioned Direct Chill (MC-DC) casting is a new development for producing high-quality billets and slabs. In the MC-DC process, liquid metal is continuously fed into a MCAST (melt conditioning by advanced shear technology) machine, where the liquid metal is subjected to high shear rate and high degree of turbulence provided by…