BRAZING RESIDUAL-STRESSES IN COMPONENTS OF DIFFERENT METALLIC MATERIALS

Brazing residual stresses are a consequence of differences between the thermal expansion coefficients of the brazed partners and the solder. In this study, components of copperr, austenitic steel and a nickel-b ase ahoy brazed on ferritic steel are investigated. Using simplifying assumptions, the resulting stress states are estimated and compared wi th experimental X-ray stress analyses and curvature measurements. This gives clear evidence of complicated inhomogeneous plastic deformation s in the compounds, which occur during cooling down from the brazing t emperature. In addition, X-ray residual stress determinations allow a quantitative description to be given of edge effects in the compounds examined.