Influence of Purity on Tensile Property of Al–Si Hypo-Eutectic Alloy Castings

Abstract

Influence of alloy purity on the tensile properties of Al-Si eutectic alloy castings has been investigated by using two kinds of the melted alloys: L-Alloy of 99.89 mass% purity and H-Alloy of 99.98 mass% purity. Although the base structure in both of alloys was composed of proeutectic -phase and eutectic structure, the eutectic structure of H-Alloy was finer than that of L-Alloy. Coarse crystals of plate-like silicon were observed in L-Alloy, while were not observed in H-Alloy. Based on the results of Brinell Hardness Test on the solidification structure, it was found that there was little difference of the hardness between the both alloys. Tensile tests were also performed in an atmosphere at room temperature. The elongation of H-Alloy was twice as large as that of L-Alloy, though the tensile strength of L-Alloy and H-Alloy were almost the same.

EFFECT OF SILICON CONTENT ON MACHINABILITY OF Al-Si ALLOYS

“…6-9) machinability section support each other. The data obtained from the study are in compliance with literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

“…Today, aluminium alloys are commonly used in numerous industries, predominantly in transport, automotive, aerospace and aviation industries [1][2][3][4][5][6][7][8]. The most important properties of aluminum alloys; in addition to aluminium alloys being plentiful in nature, its facility to produce, machine, and mould, being lightweight and its improvable mechanical properties also increase the place of use and the importance of these alloys even more in today's industries [9][10][11][12].…”

“…Some aluminium alloys are quite important materials used in the manufacturing of various parts, predominantly in automotive, transport, aviation and aerospace sectors, in order to lower emissions that are harmful to the environment (SO X, CO 2 , and NO X emissions) and to use energy resources efficiently through weight decreases [2,[3][4][5][6]. Within this scope, among the significant aluminium alloys most commonly used in today's industries is Al-Si alloys [4,7,8,10].…”

Effect of Si content on machinability of Al-Si alloys

“…Today, aluminium alloys are commonly used in numerous industries, predominantly in automotive, transport, aviation, and aerospace industries [1][2][3][4][5][6][7][8]. In addition to aluminium alloys being plentiful in nature, their facility to produce, machine, and mould, being lightweight and their improvable mechanical properties also increase the place of use and importance of these alloys even more in today's industries [9][10][11][12].…”

“…Aluminium alloys are quite important materials used in the manufacturing of various parts predominantly in automotive, transport, aviation, and aerospace sectors in order to lower emissions that are harmful to the environment (SO x , CO 2 , and NO x emissions) and to use energy resources efficiently through weight decrease [2,[3][4][5][6].…”