High cycle fatigue behavior of the IN718/M247 hybrid element fabricated by friction welding at elevated temperatures

Abstract

A hybrid element has been fabricated by friction welding, joining two superalloys Inconel 718 and Mar-M247. The high cycle fatigue behavior of this welded element was investigated at 500 °C and 700 °C. The fabrication could obtain excellent fatigue strength in which the fracture is located in the base metal Mar-M247 side and takes place outside the welded zone. The behavior of the joint under loadings is discussed through a simulation by the numerical finite element method.

Keywords

• Hybrid
• Superalloys
• High cycle fatigue
• Elevated temperature
• FEM simulation