Tensile Properties of Semi-Solid Die Cast AC4C Aluminum Alloy

Abstract:

In this study, semi-solid Al-Mg-Si alloy (AC4C) was produced by using the Gas Induced Semi-Solid (GISS) die casting process. The tensile strength and ductility of the semi-solid die cast Al alloy (GISS-DC) after T6 heat treatment were investigated and compared with those of the conventional liquid die casting (CLDC). The microstructures of GISS-DC and CLDC observed by an optical microscopy were presented. The ultimate tensile strength (UTS) and yield strength (0.2% YS) of GISS-DC are compatible with those of the CLDC. However, the GISS-DC has better ductility than the CLDC, this may be due to the smaller and more globular primary α-Al phase and rounder shaped-Si particle microstructures presented in the GISS-DC. Common shrinkage pores and defects were also observed by SEM from the fracture surfaces of both alloys.

• Periodical: Applied Mechanics and Materials (Volume 680)
• Pages: 11-14
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.680.11
• Online since: October 2014
• Authors: Ke Ren Shi, Sirikul Wisutmethangoon, Jessada Wannasin, Thawatchai Plookphol*
• Keywords: AC4C, Die Casting, Fracture, GISS, Tensile Properties

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