Friction Stir Welding of Metal Matrix Composites
The Joining of Al 6061/SiC/17.5p Using Diamond Coated Tools
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Friction Stir Welding (FSW) is a solid-state joining process developed by TWI. The large axial forces associated with this process are typically cited as one of the major obstacles to its widespread application. The primary objective of this research is to quantify the reduction of axial force through use of diamond coatings of FSW tools. Results of welds for coated and uncoated tools on Al 6061 are compared. The goal is to produce friction stir welds using the diamond-coated tool that are comparable in quality to those performed using conventional tool materials, but with an appreciable reduc...
Friction Stir Welding (FSW) is a solid-state joining
process developed by TWI. The large axial forces
associated with this process are typically cited as
one of the major obstacles to its widespread
application. The primary objective of this research
is to quantify the reduction of axial force through
use of diamond coatings of FSW tools. Results of
welds for coated and uncoated tools on Al 6061 are
compared. The goal is to produce friction stir welds
using the diamond-coated tool that are comparable in
quality to those performed using conventional tool
materials, but with an appreciable reduction in tool
wear and/or axial force. The secondary objective of
this research is to parameterize FSW of Al 6061
reinforced with 17.5 percent SiC particles, a
superabrasive composite material valued for its high
strength to weight ratio. A range of acceptable
process parameters for the joining of this material
is established. Since tool wear is a limiting factor
in the joining of composites, tool wear is
periodically monitored and quantified using an
optical comparator.
process developed by TWI. The large axial forces
associated with this process are typically cited as
one of the major obstacles to its widespread
application. The primary objective of this research
is to quantify the reduction of axial force through
use of diamond coatings of FSW tools. Results of
welds for coated and uncoated tools on Al 6061 are
compared. The goal is to produce friction stir welds
using the diamond-coated tool that are comparable in
quality to those performed using conventional tool
materials, but with an appreciable reduction in tool
wear and/or axial force. The secondary objective of
this research is to parameterize FSW of Al 6061
reinforced with 17.5 percent SiC particles, a
superabrasive composite material valued for its high
strength to weight ratio. A range of acceptable
process parameters for the joining of this material
is established. Since tool wear is a limiting factor
in the joining of composites, tool wear is
periodically monitored and quantified using an
optical comparator.
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