Influence of the tool shape and weld configuration on microstructure and mechanical properties of the Al 6082 alloy FSW joints

• Autorzy: Krasnowski K. , Hamilton C. , Dymek S.

Identyfikatory

DOI

10.1016/j.acme.2014.02.001

• Języki publikacji: EN

Abstrakty

EN

The paper deals with an investigation of the influence of tool shape and weld configuration on the microstructure and mechanical properties of Al 6082 alloy FSW joints. Three types of tool with different probe shapes and shoulder surfaces and two weld configurations (one-sided and two-sided) were used in experiments. It was shown that all tool types produce high quality butt joints free from defects or imperfections. The best tensile performance was obtained for FSW joints produced by a conventional and Triflute tool. The results obtained for joints produced by a simple unthreaded probe without grooves and with a flat shoulder are significantly lower. The joint configuration influenced mechanical properties – the two-sided welds exhibited lower mechanical properties due to greater heat transference into the material during the second pass. The changes in mechanical properties reflected changes in weld microstructure, in particular, the softening of the weld nugget was associated with intense dynamic recovery producing grains that were nearly free of dislocations. A hypothesis explaining the well-known differences in microstructure between the advancing and retreating sides is also advanced. The differences were predicted based on a recently elaborated coupled thermal/flow model developed for FSW joints.

Słowa kluczowe

EN

FSW joints mechanical properties; FSW joints static strength; FSW joints hardness; FSW joints microstructure

PL

zgrzewanie tarciowe; spajanie materiałów; zgrzewarka tarciowa

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2015
• Tom: Vol. 15, no. 1
• Strony: 133--141
• Opis fizyczny: Bibliogr. 20 poz., rys., tab., wykr.

Twórcy

autor

Krasnowski K.

• Institute of Welding, 16-18 Błogosławionego Czesława Street, 44-100 Gliwice, Poland

autor

Hamilton C.

• Miami University, Department of Mechanical and Manufacturing Engineering, Miami University, Oxford, OH, United States

autor

Dymek S.

• AGH University of Science and Technology, 30 Mickiewicz Ave, 30-059 Krakow, Poland

Bibliografia

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