Study on the Modification Effect of Al-Sr Master Alloy on A356 Aluminum Alloy
Gui Qing Chen, Gaosheng Fu, Kai Huai Yang, Chao Sheng Lin
Abstract
Gui Qing Chen, Gaosheng Fu, Kai Huai Yang, Chao Sheng Lin
Abstract
A356 aluminum alloy was modified by Al-Sr master alloy, and the eutectic silicon phase was changed from long needle to short fiber. Compared with the untreated, the secondary dendrite spacing decreased by 14.37 %, the tensile strength increased by 13.0 MPa, and the elongation increased by 29.51 %. After modification treatment, more developed secondary dendrites and block inclusions can be seen in the tensile fracture of A356 alloy, which is not conducive to the plasticity and fatigue resistance of the alloy.
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A356 aluminum alloy was modified by Al-Sr master alloy, and the eutectic silicon phase was changed from long needle to short fiber. Compared with the untreated, the secondary dendrite spacing decreased by 14.37 %, the tensile strength increased by 13.0 MPa, and the elongation increased by 29.51 %. After modification treatment, more developed secondary dendrites and block inclusions can be seen in the tensile fracture of A356 alloy, which is not conducive to the plasticity and fatigue resistance of the alloy.
Key concepts: Materials science, Alloy, Eutectic system, Elongation, Ultimate tensile strength, Aluminium, Dendrite (mathematics), Metallurgy