PHASE CONSTITUTION AND MORPHOLOGIES OF Mg-Zn-Zr ALLOY(MB15)

金属学报(英文版), 1990, 3(2): 110-115.

PHASE CONSTITUTION AND MORPHOLOGIES OF Mg-Zn-Zr ALLOY(MB15)

ZHANG Shaoqing Institute of Aeronautical Materials , Beijing , China ZHANG Shaoqing Institute of Aeronautical Materials , P.O.Box No.81 , Beijing 100095 , China

Keywords： magnesium alloy , null , null

The equal-width lath-shaped Zn_2Zr_3 phase and the irregular lump MgZn_2 phase were ob- served in the Zr-and Zn-enriched nucleus region and along the grain boundaries of the as-cast alloy.The very fine ZnZr_2 phase occurs in the grains and the superfine MgZn phase disperses in the α-Mg solid solution.In extruded shapes,the coarse grains of Zn_2Zr_3 phase and a great many dispersively distributed ZrH_2 phase and MgZn_2 phase particles appear in the Zr-and Zn-enriched lath region.They play an important role in impeding the proceeding of recrystallization.The precipitation of Mg_2Zn_3 phase may be led to the non-lath region by ageing at 170℃ for 10h.

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PHASE CONSTITUTION AND MORPHOLOGIES OF Mg-Zn-Zr ALLOY(MB15)

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