Effect of addition of 5% copper in Al A356 during cooling slope process

Saliman, Munir Muhamad Muda (2018) Effect of addition of 5% copper in Al A356 during cooling slope process. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This study is about the semi solid metal processing of aluminum A356 alloy + 5% Copper using cooling slope casting. In this study, the goal is to see the effect of microstructural evolution and also to tested the hardness and tensile of aluminum A356 Alloy + 5% Copper after using cooling slope casting and using directly poured to casting. All the experimental material will be accomplished by using aluminum A356 alloy + 5% Copper. The pattern dog bone was prepared through the conventional casting(as-cast) and cooling slope technique with various of experimental. Half of the dog bone sample was treated a heat treatment that is 540° C for 9 hours, Next, faster quenching in water for 15 minutes. All of the samples then characterized by Nikon optical microscope, Rockwell hardness test as well as tensile tests. For the experiment procedure, the result will be revealed that at pouring temperature 700°C, length of cooling slope is 400mm and 300mm,for the tilt angle is 45 degrees and 60 degrees, the A356 alloy +5% copper exhibits the spherical microstructural feature due to all dendritic structures was altered into s AL globule and rosette after heated treatment T6.The Rockwell hardness valued got from cooling slope is lower hardness then conventional casting that is 32.36 HRB. Furthermore, for tensile testing, the ultimate tensile strength for cooling slope C is at 197.59 MPA used heated treatment T6.From the resulted, the cooling slope C revealed the positive resulted which that CS C improved the microstructural distribution and tensile properties as opposed to conventional casting excepted for hardness.

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