锻压对原位Al3Ti/6063Al复合材料微结构及摩擦磨损性能影响

Effects of Forging on Microstructure and Friction and Wear properties of in situ Al3Ti/6063Al composites

摘要:

研究了不同锻压变形量30%、50%、70%，对Al3Ti/6063Al复合材料显微组织及摩擦磨损性能的影响。研究结果表明，复合材料锻压变形后，原位Al3Ti增强颗粒断裂、破碎，沿平行于锻压方向呈明显的定向分布，基体晶粒变形剧烈，形成流线型织构，材料内部产生大量位错。随锻压变形量的增加，摩擦系数降低；在相同载荷下，70%变形锻压样的摩擦系数最小；复合材料磨损表面粗糙度随锻压变形量的增加而减少，变形量为30%时，粗糙度波动范围最小，变化相对稳定；磨痕宽度随锻压变形量增加而变宽，磨痕深度则变浅；磨损机理主要是磨粒磨损。

Abstract:

Effects of different forging deformation, including amount of 30%, 50%, 70%, on the microstructure and friction and wear behavior of Al3Ti/6063Al composite material microstructure were studied. The results show that Al3Ti in-situ particles were broken and paralleled to the forging direction after deformation. Morphology of matrix grain changed obviously and formed the streamlined texture. Forging also caused a great dislocation in composites. When Amount of forging deformation increases, the friction coefficient decreased and friction coefficient declined under the same load. What’s more 70% forging material had the lowest friction coefficient; the relationship of roughness and deformation had the same function of friction coefficient and deformation., When the deformation amount of material was 30%, the extent of material roughness only can fluctuate in a small range, and change was relatively stable; when the deformation increases, the width and depth of wear scar become wider as well as shallower; abrasiveness and delimitation wear mainly occurred in the process of abrasiveness.