Study on the weldability, microstructure and mechanical properties of thick Inconel 617 plate using narrow gap laser welding method

Multi-pass narrow-gap welding of thick Inconel 617 plate was conducted with YLS-10000 fiber laser. The influence of different welding parameters on the joint geometry and defects was investigated. The dendrite morphology, grain distribution, crystal texture and stress distribution were analyzed. The microstructure evolution such as element segregation and precipitate behavior was also studied. The micro-hardness, tensile strength at room and...