Mechanical & metallurgical properties of dissimilar joining of P91 ferritic steel: A review

Abstract

Dissimilar joints of P91 ferritic steel and other materials had been widely studied for their potential applications in various industries. The mechanical and metallurgical properties of these joints can be affected by various factors such as the microstructure, composition, and thermal treatment of the materials being joined. The welding techniques and the heat affected zone playing a important role in the properties of the joints. The main concern when joining these dissimilar materials is the interface reaction and stress corrosion cracking. The hardness, tensile strength, fatigue strength, creep strength, and impact toughness of the joints are also important properties that need to be considered. The brittle fracture and diffusion bonding are also important factors that affect the mechanical and metallurgical properties. Tungsten Inert gas welding, resistance spot welding, Laser welding, Electron Beam welding, and other welding techniques have been used for joining P91 ferritic steel and other materials. The properties of the joints produced using these techniques must be thoroughly evaluated to ensure their suitability for specific applications. This review paper is focused mainly on the dissimilar joining of the P91 Ferritic steel its mechanical, corrosion properties and microstructure.