What question did this study set out to answer?

The research aims to clarify the wear mechanism of cobalt alloy during friction stir welding.

March 26, 2026Open Access

Wear mechanism of cobalt alloy under the friction stir welding temperatures

Key Points

The research aims to clarify the wear mechanism of cobalt alloy during friction stir welding.
Conducted basic reciprocating wear tests at temperatures up to 500°C.
Investigated the wear behavior of a cobalt alloy combined with aluminum alloy.
Analyzed the wear scars using transmission EBSD, EDS, and TEM techniques.
Identified specific wear mechanisms affecting the cobalt alloy at elevated temperatures.
Demonstrated that the tool's wear is influenced by the plastic flow of joining materials.
Provided insights into the structure of wear scars that contribute to joint failure.

Abstract

Friction stir welding (FSW) is a solid-state joining method in which base materials are welded by the frictional heat of two facing workpieces and a rotating tool. Since this rotating tool affects the stir properties of the workpieces, the tool wear is one of the joint failures. However, wear mechanism of the rotating tool is not clear because the tool is in the special environment such as the plastic flow of the joining materials. In this study, a basic reciprocating wear test was conducted in FSW temperature up to 500°C for a combination of aluminum alloy and cobalt alloy (36Co-26Ni). And we analyzed the under structure of wear scar using transmission EBSD, EDS and TEM.

Wear mechanism of cobalt alloy under the friction stir welding temperatures

Key Points

Abstract

Cite This Study

Also Consider

Also Consider