Using optical microscopy, microhardness tester, such as copper and aluminum dissimilar metal friction stir welding head region of the microstructure, microhardness, the joint area morphology of transitive phase composition were analyzed

The metallographic microscopes, micro-hardness of the copper, aluminum, such as different type of metal friction stir welding and regional organizations, the micro-micro-hardness, fitting area characteristics and properties of the element analysis

Uses the metallography microscope, the micro sclerometer and so on to the copper aluminum heterogeneous metal agitation friction soldered splice region microscopic organization, the microhardness, the attachment area appearance characteristic and the phase ingredient

Metallographic microscope, micro-hardness of copper and aluminum metals, such as friction stir welding head area microstructure, hardness and joint analysis of morphology and phase composition of the

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