Tensile Deformation Behavior of Aluminum Alloys with Modeled Segregation Layers

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The deformation behavior of Al alloys with modeled segregation layers was investigated using the Moire method. In the model I, in which a layer of hard weld metal (A5083) existed in the soft base metal of A1100, the flow stress was the highest in case of Θ=0゜ and followed byΘ=30゜, and the lowest in case of Θ=45, 60 and 90゜ (Θis the angle between the welding direction and the tensile axis). In case of Θ=45, 60 and 90゜ the peak of strain distribution appeared near the fusion boundary, but no peak was observed in case of Θ=30゜. In the model II, in which the hard weld metals were in layers in base metal A1100, the fiow stress showed a similar tendency to that of model I, but a little difference was observed in the flow stresses in case of Θ=45, 60 and 90゜. Strain in the center of A1100 was the smallest in Θ=30゜, followed by Θ=60 and 90゜, and the largest inΘ=45゜. In the model lll, in which the hard weld metals existed like a lattice in base metal A1100, different strain distributions were observed according to dimensions of the lattice. When the dimension of the lattice was large, two peaks of strain distribution were observed near the weld metals and the minimum was observed near the center of A1100. On the contrary, the peak of strain distribution was observed near the center of A1100. The strain in the weld metal was small in both cases. Owing to this phenomenon the flow stress was larger in small lattice than in large lattice. That is to say, it may be concluded that the smaller the dendrite arm spacing, the larger the strength of the weld metal.
社団法人溶接学会の論文
1981-10-01

Tensile Deformation Behavior of Aluminum Alloys with Modeled Segregation Layers

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