Developing high-strength titanium/steel composite structures by adding composite interlayer

Welding is currently the most effective method of joining TC4/304SS dissimilar metals. However, due to the large differences in the physical and chemical properties of titanium/steel, direct welding produces a large number of brittle intermetallic compounds such as TiFe, Ti2Fe, etc., and the joints usually fracture on their own after welding, making it impossible to obtain safe and reliable composite joints. In this study, a composite interlayer was used to realize the TC4/304 SS joint and the effect of YZ on the mechanical properties of the joint was investigated. It was found that the tensile strength of the titanium side of the composite sandwich was 968 MPa when YZ = was 8 mm. This connection method effectively avoids the generation of brittle intermetallic compounds such as Ti-Fe, and optimizes and improves the mechanical properties of the joint to a large extent, which is of great importance to the research value.