Thermo-mechanical interaction between aluminum alloy and tools with different profiles during friction stir welding

The influence of the tool profiles on the thermo-mechanical interaction between AA6061-T6 workpiece and tool during friction stir welding was investigated. A customized experimental setup was employed to measure the feature points temperature and tool spindle torque in the process of FSW. Microstruc...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2019-03, Vol.29 (3), p.495-506
Main Authors: YANG, Min, BAO, Rui-jun, LIU, Xiu-zhong, SONG, Chao-qun
Format: Article
Language:English
Subjects:
friction stir welding
tensile properties
thermal cycle
tool profile
tool spindle torque
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Summary:The influence of the tool profiles on the thermo-mechanical interaction between AA6061-T6 workpiece and tool during friction stir welding was investigated. A customized experimental setup was employed to measure the feature points temperature and tool spindle torque in the process of FSW. Microstructure and tensile properties of stir zone (SZ) were characterized. Results indicate that the shoulder and pin geometries were responsible for the heat generation, tool torque variation at the plunging stage as well as the cross section contour of SZ, respectively. Finer grains in SZ resulted from flutes on shoulder and grooves on pin. Flat faces on the pin resulted in inhomogeneous grain size. Weld with higher 0.2% yield strength of 173 MPa was obtained by using the cylindrical pin tool while higher elongation weld of 32.0% was produced with triflat threaded pin tool.
ISSN:1003-6326
DOI:10.1016/S1003-6326(19)64958-7