Scandium Influence on the Structure and Chemical Inhomogeneity of Welded Joints of Al-Zn-Mg-Cu System Alloys

Author:

Fedorchuk Viktor1,Falchenko Iuriu1

Affiliation:

1. E.O. Paton Electric Welding Institute of the NAS of Ukraine

Abstract

Structural transformations and formation of chemical inhomogeneity in the weld and HAZ metal in fusion welding of complex alloy of V96 type were studied. It is shown that under the influence of welding heat, partial melting of the alloy phase components proceeds in the heat-affected zone with formation of structures of eutectic origin in the form of extended interlayers along the grain boundaries, causing metal embrittlement. Scandium addition to the alloy enables reducing the solidification processes and degree of segregation along the grain boundaries, as well as localizing partial melting of the grains without formation of coarse eutectic interlayers.

Publisher

Trans Tech Publications, Ltd.

Reference9 articles.

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