Abstract
Calculations by the finite element method are carried out for the deformation mode of copper blanks as they are being joined by cold welding. It is found that the degree of deformation in a shut is distributed nonuniformly and reaches 3–5. A metallographic analysis revealed the appearance of a zone of abrupt grain-size refinement in the region of a weld seam. A study of the distribution of microhardness showed an increase in this parameter up to 1000 MPa in the arrangement region of the weld seam with respect to 790MPa in the parent metal. The experimental data confirmed the computed characteristics.
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