A Review on Additive Manufacturing Processes of Inconel 625

Metal-based additive manufacturing is an emerging low-cost manufacturing method to produce components with complex features. Inconel 625 (IN625) is a nickel-based superalloy and is used in high-temperature application products. IN625 has high strength and corrosion resistance at elevated temperatures. When processed in conventional machining, these materials face excessive tool wear and low material removal rates. Advanced manufacturing processes are exploring to overcome these difficulties. This paper reviews the application of additive manufacturing for the processing of IN625. The resultant microstructure and mechanical behavior of additively manufactured parts with IN625 are studied. Investigation of the material processing using three power sources, such as laser-based, electron beam-based, and electric arc-based, is discussed.