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通过连续渗流方法制备出钨丝体积分数为62%~66%,钨丝直径分别为40,60,80,150μm的钨丝增强锆基非晶合金复合材料。研究表明,钨丝直径为80μm时,非晶合金复合材料的抗拉伸强度和延伸率分别达到最大值,当钨丝直径增加到150μm时,非晶复合材料的抗拉伸强度和塑性急剧降低。对断口形貌进行了分析。研究发现钨丝增强非晶复合材料中,增强相直径不同引起面体率变化,从而影响非晶和钨丝界面的应力、钨丝在三轴应力状态下的变形和断裂以及非晶基体中剪切带的形成和扩展,最终影响复合材料的拉伸力学性能。
The tungsten filament reinforced Zr-based amorphous alloy composite with tungsten filament volume fraction of 62% -66% and tungsten filament diameter of 40, 60, 80 and 150μm were prepared by continuous flow method. The results show that when the diameter of tungsten wire is 80μm, the tensile strength and elongation of the amorphous alloy composites reach the maximum, respectively. When the diameter of the tungsten wire increases to 150μm, the tensile strength and ductility of the amorphous composites decrease sharply . The fracture morphology was analyzed. It has been found that the increase of surface area ratio caused by the increase of phase diameter in the tungsten filament reinforced amorphous composites can affect the stress of the interface between the amorphous and tungsten wires, the deformation and fracture of the tungsten wires under triaxial stress and the shear in the amorphous matrix The formation and expansion of the tape ultimately affect the tensile mechanical properties of the composite.