TY - JOUR
T1 - Tool geometry for friction stir welding - Optimum shoulder diameter
AU - Mehta, M.
AU - Arora, A.
AU - De, A.
AU - Debroy, T.
N1 - Funding Information:
The authors thank Dr. Thomas J. Lienert, Los Alamos National Laboratory, for helpful comments in the preparation of this article. This research was supported by a grant from the Materials Division, Office of Naval Research, Dr. William Mullins, Program Director.
PY - 2011/9
Y1 - 2011/9
N2 - The most important geometric parameter in the friction stir welding (FSW) tool design is the shoulder diameter, which is currently estimated by trial and error. Here, we report a combined experimental and theoretical investigation on the influence of shoulder diameter on thermal cycles, peak temperatures, power requirements, and torque during FSW of AA7075-T6. An optimum tool shoulder diameter is identified using a three-dimensional, heat transfer and materials flow model. First, the predictive capability of the model is tested by comparing the computed values of peak temperature, spindle power, and torque requirements for various shoulder diameters against the corresponding experimental data. The change in the values of these variables with shoulder diameter is correctly predicted by the model. The model is then used to identify the optimum tool shoulder diameter that facilitates maximal use of the supplied torque in overcoming interfacial sticking. The tool with optimum shoulder diameter is shown to result in acceptable yield strength (YS) and ductility.
AB - The most important geometric parameter in the friction stir welding (FSW) tool design is the shoulder diameter, which is currently estimated by trial and error. Here, we report a combined experimental and theoretical investigation on the influence of shoulder diameter on thermal cycles, peak temperatures, power requirements, and torque during FSW of AA7075-T6. An optimum tool shoulder diameter is identified using a three-dimensional, heat transfer and materials flow model. First, the predictive capability of the model is tested by comparing the computed values of peak temperature, spindle power, and torque requirements for various shoulder diameters against the corresponding experimental data. The change in the values of these variables with shoulder diameter is correctly predicted by the model. The model is then used to identify the optimum tool shoulder diameter that facilitates maximal use of the supplied torque in overcoming interfacial sticking. The tool with optimum shoulder diameter is shown to result in acceptable yield strength (YS) and ductility.
UR - https://www.scopus.com/pages/publications/80052638735
UR - https://www.scopus.com/inward/citedby.url?scp=80052638735&partnerID=8YFLogxK
U2 - 10.1007/s11661-011-0672-5
DO - 10.1007/s11661-011-0672-5
M3 - Article
AN - SCOPUS:80052638735
SN - 1073-5623
VL - 42
SP - 2716
EP - 2722
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 9
ER -