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Effect of B Refinement on Structure and Fracture Morphology of Al-7 wt.% Si Alloy

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Abstract:

Using optical microscope, electronic tensile testing machine, scanning electron microscopy methods, such as detailed treatment of the B hypoeutectic Al-Si alloy microstructure, mechanical properties and fracture morphology were studied. The results showed that after treatment by the B refinement, α-Al dendrite phase was refined, resulting in mechanical properties of Al-Si alloy significantly improved. Which, B content 0.036wt.%, the alloy the best, the σb, δ, respectively, than the non-thinning increased 67.8% and 15.2%. From the fracture surface, the fracture morphology of the specimen showed a quasi-cleavage fracture. Which, B content 0.036wt.% at the time of fracture is more deep dimples, and a good plastic toughness.

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Periodical:

Applied Mechanics and Materials (Volume 590)

Pages:

181-186

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.590.181

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Online since:

June 2014

Authors:

Xiao Song Li, An Hui Cai*, Ji Jie Zeng

Keywords:

Al-7 Wt.% Si Alloy, B, Fracture Surface, Refinement

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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