Effect of Annealing Time on Tensile Properties of Ti-Al Composite Plates
In this paper,titanium aluminum composite plate made by warm rolling process is selected,and then annealed at different times.Optical microscope,scanning electron microscope and tensile property test are used to study the influence of annealing time on the tensile property of titanium aluminum composite plate.The results show that the grain boundary of the conded layer of the processed titanium-aluminum composite plate is relatively straight and complete,and no obvious diffusion phenomenon is observed.The pure titanium layer presents a mixed structure of equiaxed crsytal and twin crystal,while the pure aluminum layer has a completely broken grain and elongated ribbon structure.Compared with the processed state,it is found that the plasticity of the composite plate is significantly improved after annealing,but the strength is somewhat reduced.The tensile fracture of the composite plate is mainly composed of dimple,which has obvious ductile fracture characteristics.According to the analysis,this is caused by the removal of residual stress caused by annealing during the plastic processing of the composite plate.
万方数据
维普
