Unidirectional tensile tests were carried out on CuSn10P1 alloys with two different intergranular segregation degrees at room temperature and stretching velocity of 1 mm·min-1.The results show that the tensile strength and elongation after fracture of semi-solid alloy are increased by 30.7%and 378.7%than those of liquid alloy,respectively.Cracks in both materials extend along the intergranular and α-phase high Sn transition layer during tension process,but the semi-solid CuSn10P1 alloy has superior mechanical properties.This is mainly attributed to that the semi-solid CuSn10P1 alloy has less intergranular structure,finer grain size and higher solid solubility of Sn element.After fracture,deformed twins are found in the region of α-phase high Sn transition layer of the semi-solid CuSn10P1 alloy,indi-cating a shift in the deformation mechanism from slip mechanism to twinning mechanism.
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