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Technical Note

Mechanical behavior and fractography analysis of Zn-Sn alloy matrix composites reinforced with nano B4C particles

Santosh V Janamatti1Veerabhadrappa Algur2Madeva Nagaral3MV Auradi4

1Department of Mechanical Engineering, Ballari Institute of Technolog and Management, Ballari, Karnataka, India

2Department of Mechanical Engineering, Rao Bahadur Y Mahabaleswarappa Engineering College, Ballari, Karnataka, India

3Aircraft Research and Design Centre, HAL, Bengaluru, Karnataka, India

4Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumakuru, Karnataka, India

Keywords

Abstract


Zn-Sn Alloy;

B4C;

Stir Casting;

Hardness;

Tensile Strength;

Impact Strength

The effect of nano-sized B4C particulates on the Zn85-Sn15 alloy has been investigated. Composites reinforced with B4C of (0%, 2%, 4% and 6%, by weight) are manufactured by two step stir casting. Microstructural studies carried out by SEM, EDS, and XRD and mechanical testing like tensile, hardness, and impact were performed on cast samples. The criteria for determining strength and fractography are met. EDS analysis confirms the homogeneous distribution of B4C particles in the Zn-Sn matrix seen in SEM micrographs. XRD examination revealed the B4C phases in the Zn-Sn alloy matrix as well. When B4C reinforcement is added to the basic matrix alloy, it improves its hardness and tensile strength with slight decrease in the ductility and impact strength. Further, tensile and impact fractured surfaces were studied to know the different fracture mechanisms.

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