Effects of Post Processing Heat Treatments on the Bond Quality and Mechanical Strength of Ti/AI3003 Dual Materials Fabricated using Ultrasonic Consolidation

摘要

The interface between layers in ultrasonically fabricated parts is often poor for desirable material combinations, resulting in relatively low bond strength. This makes these fabrications unsuitable for structural applications. This work discusses a study of the effects of post processing heat treatment of ultrasonically consolidated titanium and aluminum dual-material specimens. The shear strengths of as-deposited specimens as well as heat treated ones were tested. The results show that there is significant improvement of the strengths of post processed specimens over the as-fabricated ones. The improvement is as a result of interactions of the base materials across the interfacial boundaries at elevated temperatures, leading to stronger bonds. The study highlights the role of post processing for improving the mechanical properties of ultrasonically consolidated structures.