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A. Baskaran ¹, K. Shanmugam ¹, V. Balasubramanian ¹

Affiliations
1 Centre for Materials Joining & Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalainagar, Tamil Nadu, IN

Abstract

In the present work an attempt was made to develop low cost high temperature wear resistance hard facing tools. The hard facing was applied on mild steel rod using chromium carbide powder and tungsten carbide powder by plasma transferred arc (PTA) hard facing technique. A comparative study was done to study the performance of hard facing tools with conventional tools. In this work, friction stir welding of AA7075-T6 plate of 6 mm thickness was investigated with an aim to understand the performance of tool materials on weld microstructure and tensile properties. The results showed that sound joints can be achieved with a joint efficiency of 83% while using PTA hard faced tools with careful selection of optimized process parameters.

Keywords

Plasma Transferred Arc Hard Facing, Friction Stir Welding, Aluminum Alloy, Tensile Properties.

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A. Baskaran ¹, K. Shanmugam ¹, V. Balasubramanian ¹

Affiliations
1 Department of Manufacturing Engineering, Annamalai University, Annamalainagar- 608002, Tamil Nadu, IN

Abstract

In the present work an attempt was made to develop high temperature wear resistant hardfaced tools for friction stir welding (FSW) of commercial grade copper alloys. Hardfacing was applied on mild steel rod using chromium carbide forming powder by plasma transferred arc (PTA) hardfacing process. Commercially available tool materials like high carbon steel (HCS), high speed steel (HSS) and super high speed steel (SHSS) were also used to friction stir weld copper alloy for comparison purpose. From this investigation, it is found that the PTA hardfaced tool yielded defect free joints without tool wear compared to other tools. The optimum level of heat generation, formation of finer grains and higher hardness of stir zone are main reasons for the superior tensile properties of the joints fabricated by PTA hardfaced tungsten carbide tools.

Keywords

Plasma Transferred arc Hardfacing, Friction Stir Welding, Copper Alloy, Tensile Properties, Microstructure.

Full Text

     

A. Baskaran ¹, K. Shanmugam ¹, V. Balasubramanian ¹

Affiliations
1 Department of Manufacturing Engineering, Annamalai University, Annamalainagar, Tamil Nadu, IN

Abstract

In the present work an attempt was made to develop high temperature wear resistant hardfacing tools for friction stir welding (FSW) of commercial grade copper alloy. Hardfacing was applied on mild steel rod using Tungsten carbide forming powder by plasma transferred arc hardfacing (PTA) process. Commercially available tool materials like high carbon steel (HCS), high speed steel (HSS) and super high speed steel (SHSS) were also used to friction stir weld copper alloy for comparison purpose. From this investigation, it is found that the PTA hardfaced tool yielded defect free joints without tool wear compared to other joints. The optimum level of heat generation, formation of finer grains and higher hardness of stir zone are main reasons for the superior tensile properties of the joints fabricated by PTA hardfaced tungsten carbide tools.

Keywords

Friction Stir Welding, Copper Alloy, Plasma Transferred Arc Hard Facing, Tensile Properties, Microstructure.

Full Text