Dissimilar titanium and titanium aluminide joints manufactured by laser beam welding and laser additive manufacturing
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Technische Universität Hamburg (2021)
Motivated by the increasing demands for lightweight constructions, the aim is to obtain crack-free dissimilar Ti- and γ-TiAl-Ti-alloy joints by focusing on laser beam welding as the joining method. This was successfully achieved by preheating and the crack formation could be correlated to the microstructure-phase evolution. Through tensile tests the influence of the dissimilar interface on the fracture position and tensile properties could be revealed. Extending the thesis, the gained knowledge regarding the microstructure-phase evolution at the interface could be successfully transferred to the laser metal dep-ositions. Besides, the limited transferability concerning the crack formation was demonstrated. Hence, the fundamentals for crack-free γ-TiAl-Ti-alloy joints and depositions were established.
laser beam welding