Friction Stir Welding of Monel 400: Microstructure, Substructure, and Mechanical Properties

Document Type : Original Articles

Author

• Akbar Heidarzadeh

Azarbaijan Shahid Madani University

10.22067/ma.v31i2.68236

Abstract

In this study, the microstructure, substructure and hardness of the friction stir welded Monel 400 were investigated and compared with those of the base metal. For this purpose, the Monel 400 plates were friction stir welded at a tool rotational speed of 400 rpm, and a tool traverse speed of 100 mm/min. For characterizing the microstructure and grain boundaries in base metal and stir zone, the electron backscattered diffraction was utilized. The transmission electron microscopy was used for studying the substructures. In addition, microhardness test was conducted to hardness measurement. The results showed that the grain refinement, increasing in dislocation density and Taylor factor were the main reasons of the higher hardness of the stir zone.

Keywords

• Monel
• Friction Stir Welding
• Microstructure

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