组元层厚对TC4/Al_(3)Ti微叠层复合材料性能影响

Effects of Component Layer Thickness on Properties of TC4/Al_(3)Ti Microlaminated Composites

以TC4箔材和纯Al箔材为原材料,用高真空热压法制备了TC4/Al_(3)Ti微叠层复合材料,研究了组元层厚对复合材料组织与性能的影响。使用金相显微镜、X射线衍射仪、扫描电镜和场发射电子探针对复合材料的显微组织、裂纹断口进行分析。结果表明,当试样厚度及试样内Al_(3)Ti体积分数一定时,组元层厚越小,复合材料力学性能越优异。当堆叠层数为55层时,组元层厚最小,材料性能最佳,其抗弯强度为970 MPa,垂直于层的抗压强度为1 307 MPa,平行于层的抗压强度为1 206 MPa。

TC4/Al_(3)Ti micro-laminated composites were prepared by high vacuum hot pressing taking TC4 foil and pure Al foil as raw materials, and the influence of component layer thickness on the microstructure and properties of the composites was investigated. The microstructure, crack fractures were analyzed by metallographic microscopy, X-ray diffractometer, scanning electron microscopy, and field emission electron probes. The results indicate that with the constant thickness and volume fraction of Al_(3)Ti in the specimen, the smaller the component layer thickness, the better the mechanical properties. When the number of laminated layers is 55, the component layer thickness is the minimum, and the performance is optimal, where the flexural strength is 970 MPa, the compressive strength perpendicular to the layer is 1 307 MPa, and that parallel to the layer is 1 206 MPa.