Development of a High Strength Cast Aluminium Alloy for Possible Automotive Applications

Abstract

Al-Si-Cu alloys of the 319 type are age hardenable alloys and offer a good combination of mechanical properties with excellent castability, corrosion resistance and low cost, making these alloys attractive for the automotive industry. The mechanical properties of Al-Si-Cu alloys can be improved by minor alloying additions. The paper describes the attempts to develop a high strength cast aluminium alloy by the addition of Mg to 319 alloy for producing high integrity automobile components. The importance of optimizing the addition of Mg and optimization of the heat treatment parameters, especially the ageing temperature for achieving high strength, are explained. The increase in UTS is accompanied by a decrease in elongation. The elongation is proposed to be increased by the microstructural refinement that can be achieved by squeeze casting.

Effects of Sr content on the microstructure and mechanical properties of cast Al–12Si–4Cu–2Ni–0.8Mg alloys

“…To develop these fuel-efficient vehicles, lightweight high performance pistons are essential [1][2][3][4]. Piston for light vehicle engines have usually been cast from eutectic and near-eutectic Al-Si alloys containing typically 0.5-5.5 wt.% Cu, 0.5-3 wt.% Ni, 0.6-1.3 wt.% Mg and other minor elements.…”

Effect of Modification with Different Contents of Sb and Sr on the Thermal Conductivity of Hypoeutectic Al-Si Alloy

“…Most of aluminum alloy castings are aluminum-silicon alloy [1]. Al-Si alloy is widely applied in automobile, aviation, electrical and communication industries because of its good casting performance, low density, low cost, good electrical conductivity, thermal conductivity and mechanical properties [2][3][4]. With the development of communication technology recently, the communication base stations are springing up all over the world, where the heat dissipation performance of the radiator is a vital important index for the work efficiency of communication electrical components.…”

Research Progress on Multi-Component Alloying and Heat Treatment of High Strength and Toughness Al–Si–Cu–Mg Cast Aluminum Alloys

“…Among automotive aluminum alloys, cast aluminum alloys are widely used in automotive parts due to their good casting moldability and economy [ 6 ]. Cast aluminum alloys usually include Al–Si, Al–Mg, Al–Cu, and Al–Zn alloys.…”