Mechanical Properties of Multi-Directional Forged Al-7Si-4Zn-3Cu Alloy

Abstract:

In this study, Al-7Si-4Zn-3Cu alloy was processed by multi-directional forging (MDF) at 3, 6 and pass corresponding one, two and three cycle, respectively. The structural and mechanical properties of the alloys were investigated at as-cast, homogenised and MDF states. The MDF resulted in a severely deformed and refined microstructure with eliminated casting defects like micro-porosity and formation of nearly homogeneous distributed finer silicon particles. The tensile (UTS) and yield (YS) of the alloy increased up to two cycle, above which they showed a decrease, while the percent elongation increased continuously as the cycle number increased. The comprehensive strength and micro and macro hardness of the alloy decreased with increasing MDF cycles. The results were evaluated according to microstructural changes depending on MDF cycles.

• Periodical: Defect and Diffusion Forum (Volume 385)
• Pages: 250-255
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.385.250
• Online since: July 2018
• Authors: Yasin Alemdağ*, Sadun Karabıyık, Harun Yanar, Gençağa Pürçek
• Keywords: Al-Si Based Alloys, Grain Refinement, Multi Directional Forging, Severe Plastic Deformation

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