EFFECT OF Sr ADDITION ON THE MICROSTRUCTURE AND PROPERTIES OF THE A356 Al ALLOY | Zendy

Wenduan Yan | Zendy; Gaosheng Fu | Zendy; XU Yan-hua | Zendy; Wanqing Lai | Zendy; Hongling Chen | Zendy

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EFFECT OF Sr ADDITION ON THE MICROSTRUCTURE AND PROPERTIES OF THE A356 Al ALLOY

Author(s) -

Wenduan Yan,

Gaosheng Fu,

XU Yan-hua,

Wanqing Lai,

Hongling Chen

Publication year - 2021

Publication title -

materiali in tehnologije

Language(s) - English

Resource type - Journals

eISSN - 1580-3414

pISSN - 1580-2949

DOI - 10.17222/mit2020.038

Subject(s) - materials science , alloy , eutectic system , microstructure , elongation , ultimate tensile strength , metallurgy , casting

An effective way of integrating purification and modification is used for casting the A356 Al alloy. Self-generated inclusion-eliminating flux exhibits excellent purification in the alloy with an inclusion-removal rate of 74 %. The grains of eutectic silicon are fine or vermicular, and diffusely distributed in the A356 Al alloy at a 0.012 w/% Sr addition. The mechanical properties of the alloy are significantly improved, including a tensile strength of 208.5 MPa and an elongation of 17.5 %. As the Sr addition is increased, the comprehensive properties of the material are not improved. The Sr addition can be reduced to a certain degree during the modification of the melt after high purification. The addition of 0.012 w/% Sr is most preferable in the alloy.

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