Influence of microstructure and porosity on the fracture toughness of Al-Si-Mg alloy | Zendy

Maria Teresa Di Giovanni | Zendy; João Teixeira Oliveira de Menezes | Zendy; E. Cerri | Zendy; Enrique Mariano Castrodeza | Zendy

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Influence of microstructure and porosity on the fracture toughness of Al-Si-Mg alloy

Author(s) -

Maria Teresa Di Giovanni,

João Teixeira Oliveira de Menezes,

E. Cerri,

Enrique Mariano Castrodeza

Publication year - 2019

Publication title -

journal of materials research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.832

H-Index - 44

eISSN - 2214-0697

pISSN - 2238-7854

DOI - 10.1016/j.jmrt.2019.11.055

Subject(s) - materials science , fracture toughness , microstructure , alloy , porosity , metallurgy , damage tolerance , fracture (geology) , composite material , aluminium , toughness , composite number

With improving molten metal quality and foundry technology, cast alloys are expected to be used more commonly in critical applications. The demands for improved damage tolerance of cast aluminum alloys have increased the importance of fracture-related properties. In this perspective, the present study aims to evaluate the effect of four different aging treatments on fracture toughness of a die cast A356 Al alloy with and without Cu addition. Crack growth resistance curves (J-R curves) were experimentally evaluated using the ASTM E1820-17 standard procedure on 25 mm thick compact tension C(T) specimens. The influence of microstructure and porosity in hardness and fracture toughness (JIc) is discussed. In addition, microstructural observations were carried out to endorse the fracture mechanisms.

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