Effect of Ultrasonic Treatment on the Microstructure and Mechanical Properties of Hypereutectic Al-Si Alloy (A392).

Elmidany, Tawfik Tawfik Mohamed; Waly, Mohamed Abd El-Wahab; Moussa, Mohamed Eissa; Essa, Yasser Mohamed

doi:10.21608/bfemu.2020.96271

Effect of Ultrasonic Treatment on the Microstructure and Mechanical Properties of Hypereutectic Al-Si Alloy (A392).

Document Type : Research Studies

Authors

¹ Professor of Production and Mechanical Design Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

² Department of Manufacturing Technology., Laboratory of Foundry., Central Metallurgical Research and Development Institute (CMRDI), P.O. 87., Helwan., Egypt.

³ Postgraduate Student., Production Engineering and Mechanical Design Department., Mansoura University., Egypt.

10.21608/bfemu.2020.96271

Abstract

Hypereutectic Al–Si alloy (A392) was treated with ultrasonic vibration (UV) induced to the melt through a cylindrical resin–bonded sand mold. This work aims at studying the influence of UV at the different pouring temperatures of A392 alloy during solidification process on the microstructures and mechanical properties. The microstructures of as-cast samples were examined by using optical microscopy (OM) and scanning electron microscopy (SEM). The mechanical properties were investigated by tensile and hardness tests. The results showed clearly that with applied UV at optimum pouring temperature (640 ^oC), nearly fine uniform and polyhedral shape of the primary Si were obtained. Improvement of tensile properties and hardness of the investigated alloy modified with UV is related to the modification and reﬁnement of primary Si particles. The fracture surfaces of prepared alloy without and with UV were also investigated.

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