The Charpy impact energy of A356 alloys has been measured. Instrumented Charpy impact tests have been conducted at 25, 100, 150, and 200 ~ The Charpy specimens were machined from plate castings or tapered cylindrical castings. The plates were produced in sand molds, and tapered cylinders were produced in water-cooled copper molds. Both unmodified and strontium-modified castings were tested. The...

It was recently shown that silicon particles in heat-treated Al–Si casting alloys can contain flaws such as surface pinholes and grooves, which cause varying degrees of reduction in the in situ particle fracture strength and hence influence the mechanical properties of this class of alloys. In this work, we show that the formation of one class of such strength-limiting flaws in solidified and c...

A356 aluminium alloy is subjected to heat treatment and high-pressure torsion (HPT) processing investigate the impact of combined treatments on alloy’s microstructure refinement, corrosion resistance hardness. The process was performed at room temperature for 0.75 5 turns. Subjecting Al a subsequent HPT produced more refined microstructure, which has effect enhancing hardness under fragmentatio...

This research investigated the effect of Fe on grain refinement recycled A 356 alloy refined by Al-5Ti-1B master using macrostructure examination and chemical composition analysis. Results showed that as recycling number increased, refining performance decreased, particularly in subsequence process. The decreased concentration titanium boron were responsible for degraded A356 alloy. Appropriate...

A series of calculations has been conducted to study the high-speed interaction space debris (SD) particles with screens finite thickness. For first time, taking into account fracture effects, a numerical solution obtained for problem high-velocity between SD and volumetrically reinforced penetrating composite screen. The were performed using REACTOR 3D software package in three-dimensional set...

  Abstract:   The aims of this research were to investigate the effects of semisolid metal (SSM) processing parameters (i.e., shear rates –times – temperatures combinations) on the primary solidification products and isothermal holding duration, subsequent to cessation of stirring on the secondary solidification of Al-Si (A356) alloy.   The dendrite fragmentation was found to be the governing m...

Aluminum alloy A356 matrix syntactic foams filled with SiC hollow particles (SiCHP) are studied in the present work. Two compositions of syntactic foams are studied for quasi-static and high strain rate compression. In addition, dynamic mechanical analysis is conducted to study the temperature dependent energy dissipation and damping capabilities of these materials. The thermal characterization...

Phys. 26, 660 (1977). 20. C. D. Je ries, History of the Development of Polarized Targets in Proc. Ninth Int. High-Energy Spin Physics Symposium, Bonn, FRG, K. H. Alto and W. Meyer, eds. (Springer-Verlag, Berlin, 1990); W. Meyer, Present Status of Polarized Solid Targets, Proc. Eleventh Int. High Energy Spin Physics Symposium, Bloomington, Indiana , K. Heller and S. Smith, eds. (AIP Press, New Y...