Microstructure and Mechanical Properties of Friction Stir Welded Al-Zn-Mg-Cu Alloy

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The microstructure and mechanical properties of friction stir welded Al-Zn-Mg-Cu alloy sheet were investigated by means of hardness and tensile tests, optical microscope and scanning electron microscope. The hardness profile of the weld exhibits a W shape with the lowest value in the thermo-mechanically affected zone on the advancing side. The tensile strength and elongation of the weld are about 71% and 72% that of the base material. In the nugget zone, there are a number of fine recrystallized grains and dispersed precipitates at grain boundaries. In the thermo-mechanically affected zone, the grain size is not uniform and there are a number of precipitates at grain boundaries. In the heat affected zone, the grain structure is similar to the base material.

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Periodical:

Edited by:

Fangping Zhang

Pages:

7-11

Citation:

S. D. Liu et al., "Microstructure and Mechanical Properties of Friction Stir Welded Al-Zn-Mg-Cu Alloy", Applied Mechanics and Materials, Vol. 628, pp. 7-11, 2014

Online since:

September 2014

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$38.00

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