Effects of section thickness on the optimum properties OF Al-8%Si alloy squeeze cast components

  • Abdulkabir Raji Department of Mechanical Engineering, Federal University of Technology, PMB 2076, Yola, Adamawa State, Nigeria
  • RH Khan Department of Mechanical Engineering, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria

Abstract

This study was conducted to produce squeeze castings, determine the effects of section thickness on the optimum properties of squeeze cast products from Al-Si alloy. Squeeze castings with section thickness ranging from 8 to15mm and aspect ratio (height-to-section thickness ratio) not greater than 3.125:1 were made from Al-8%Si alloy using squeeze pressures of 125MPa with the alloy poured at 700°C into a squeeze die preheated to about 250°C. A lubricant made of 10% graphite in lubricating oil was used to ease ejection of squeeze castings from the die. Squeeze time was 30s. The study found that a small deviation of ±2.0mm from the nominal size of 10.0mm has no significant impact on the optimum mechanical properties of squeeze castings. However, a large deviation of +5.0mm from the nominal size significantly reduced the optimum mechanical properties of the squeeze castings.

Keywords: squeeze casting, porosity, alloy, thickness

Global Journal of Engineering Research Vol.4 (1&2) 2005: 13-16
Published
2006-01-26
Section
Articles

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eISSN: 1596-292X