Impact toughness and fractography in Mg-Y alloy

Publication date: 5 June 2017
Source:Materials & Design, Volume 123
Author(s): Jun Cheng, Yongliang Mu, Guoyin Zu, Guangchun Yao
Mg-1.5Y alloy shows significantly enhanced room temperature impact toughness compared to pure Mg. Enhanced strength and ductility of Mg-1.5Y alloy are the principal contributors to the increased impact toughness. Under high deformation rate, pure Mg mainly deforms by basal slip and tensile twinning. In contrast, the fracture surface and profile analysis for Mg-1.5Y alloy indicated a blunt crack-tip, where the growth of tensile twinning is suppress and the deformation was dominated mainly by the dislocation slip.

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