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在水冷铜坩埚中采用铜模吸铸法以不同的铸造温度制备出直径3mm的Zr53.9Cu29.4Ni4.9Al9.8Fe2合金试样,研究了铸造温度对锆基块体金属玻璃力学性能和组织的影响。研究结果表明,对于试样的非晶结构,存在一个临界铸造温度,低于此温度会有晶体相析出。在一定范围内提高铸造温度可以提高锆基块体金属玻璃的压缩断裂强度和轻微降低塑性。当铸造电压升高至9kV时,不但可以提高合金试样的压缩断裂强度,同时提高其塑性,其塑性达到2.62%。通过控制与自由体积和残余应力相关的铸造温度,可以调节锆基块体金属玻璃的力学性能。
In the water-cooled copper crucible copper mold suction casting method with different casting temperature prepared 3mm diameter Zr53.9Cu29.4Ni4.9Al9.8Fe2 alloy samples studied the casting temperature of zirconium-based bulk metallic glass mechanical properties and microstructure influences. The results show that there is a critical casting temperature for the amorphous structure of the sample, below which the crystalline phase is precipitated. Increasing the casting temperature within a certain range can improve the compressive rupture strength and slightly reduce the ductility of zirconium-based bulk metallic glass. When the casting voltage is increased to 9kV, not only can improve the compressive rupture strength of the alloy sample, but also improve the ductility, the ductility reaches 2.62%. By controlling the casting temperature associated with free volume and residual stress, the mechanical properties of zirconium-based bulk metallic glass can be adjusted.