from FSW can be broadly categorised into 3 distinct groups, metallurgical, environmental, and energy. A full list of the advantages can be below in table 2.1.4.1 which was taken from their research paper: Table 2.1.4.1 Advantages of FSW [Mishra and Ma, 2005] – Metallurgical advantages Environmental Advantages Energy Advantages Solid state joining process No Shielding gas required Improved materials use (i.e. joining different thickness) allows reduction in weight Low distortion of work piece No surface cleaning required Only 2.5% of energy needed for a weld Good dimensional stability and Eliminate grinding waste Decreased fuel consumption in repeatability light weight aircraft, automotive and ship applications No loss of alloying elements Eliminate solvents required for degreasing metallurgical properties in Consumable materials saving, joint area such as rugs, wire or any other gases Fine microstructure Can be performed water Replace multiple joined by fastener Absence of cracking 2.1.7 Advantages of Stationary Shoulder Corner FSW – The most critical advantage of the process is that now angled plates can be welded, but also produce rounded effects, or other shapes if necessary. As SSCFSWelding involves the use of a stationary shoulder there is a reduced heat input compared to that of fixed shoulder, which generally results in improved weld microstructure and properties. It now is easier to add ribs and straighteners to existing components, but also eliminate any weak corners from other weld types. Other advantages are listed below: Reduced use of energy compared to that of MIG, TIG, and welding types Reduced material wastage Weld quality is far more uniform than other welding types No fume extraction is required, giving a better working environment Allows for full FSW construction Can eliminate need for sealants on aerospace stringers Improved corrosion resistance More light weight joints 2.1.8 - Limitations to FSW There are several drawbacks to the both the FSWelding process and the SSCFSWelding process. In both cases the workpiece has to be firmly clamped and a there is a key hole from where the FSW tool has exited the weld. For SSCFSW it requires to two runs for either side of the t-weld,
from FSW can be broadly categorised into 3 distinct groups, metallurgical, environmental, and energy. A full list of the advantages can be below in table 2.1.4.1 which was taken from their research paper: Table 2.1.4.1 – Advantages of FSW [Mishra and Ma, 2005] Metallurgical advantages Environmental Advantages Energy Advantages Solid state joining process No Shielding gas required Improved materials use (i.e. joining different thickness) allows reduction in weight Low distortion of work piece No surface cleaning required Only 2.5% of energy needed for a weld Good dimensional stability and repeatability Eliminate grinding waste Decreased fuel consumption in light weight aircraft, automotive and ship applications No loss of alloying elements Eliminate solvents required for degreasing metallurgical properties in joint area Consumable materials saving, such as rugs, wire or any other gases Fine microstructure Can be performed water Replace multiple joined by fastener Absence of cracking 2.1.7 – Advantages of Stationary Shoulder Corner FSW The most critical advantage of the process is that now angled plates can be welded, but also produce rounded effects, or other shapes if necessary. As SSCFSWelding involves the use of a stationary shoulder there is a reduced heat input compared to that of fixed shoulder, which generally results in improved weld microstructure and properties. It now is easier to add ribs and straighteners to existing components, but also eliminate any weak corners from other weld types. Other advantages are listed below: Reduced use of energy compared to that of MIG, TIG, and welding types Reduced material wastage Weld quality is far more uniform than other welding types No fume extraction is required, giving a better working environment Allows for full FSW construction Can eliminate need for sealants on aerospace stringers Improved corrosion resistance More light weight joints 2.1.8 - Limitations to FSW There are several drawbacks to the both the FSWelding process and the SSCFSWelding process. In both cases the workpiece has to be firmly clamped and a there is a key hole from where the FSW tool has exited the weld. For SSCFSW it requires to two runs for either side of the t-weld,
Corrected%20thesis%20%282015%29.docx