【摘要】 采用拉伸试验、金相显微镜、扫描电子显微镜对复合铸造法制备的16Mn/Zn复合材料界面层组织和性能进行了研究。研究结果表明:16Mn/Zn复合材料的强度介于锌和16Mn钢之间;受纵向拉伸的条件下,16Mn/Zn复合材料中的微裂纹首先在靠近钢一侧的界面层处萌生,并随载荷增加,微裂纹逐向锌基体扩展,与外加应力相垂直的主裂纹联接成大裂纹,最终导致锌断裂,之后应力由16Mn钢单独承载直至断裂;16Mn/Zn复合材料的纵向拉伸断口分为韧性断裂(16Mn钢)和脆性断裂(界面和锌)。更多还原

【Abstract】 Mechanical properties and interfacial microstructure of 16Mn/Zn composite were investigated by means of tensile test,SEM and optical microscope.Results show that stress-strain curve of the 16Mn/Zn composite under tension lies between the stress-strain curves of 16Mn steel and zinc at room temperature.The micro-crack initiation occurred at 16Mn steel side of the interface of 16Mn steel and zinc in 16Mn/Zn composite under axial tension is observed.The cracks propagates towards zinc in the direction normal to the loading with increasing loading.At the same time,micro-crack initiation and propagation in zinc occurs,and the micro-cracks connect with each other to form main-cracks and then the growth of main-cracks causes zinc rapture.After that 16Mn steel in the composite supports load to rapture.The fracture of dimples in 16Mn steel and cleavage characteristics in zinc is observed for the 16Mn steel/Zn composite.更多还原