The
mechanical properties and
deformation behavior of
light beam brazing butt and lap joints were investigated by
tension test. The breaking strength σ b, relative elongation δ and fracture surface shrinkage ψ of butt
joint by light beam
Brazing are lower than those of brazed base material. The elastic limit σ 0.01 and yield limit σ 0.2 of similar materials joint are similar to those of base material, while those properties of dissimilar materials joint only lie on the base material with lower yield limit. When tension load acts on the butt joint, the similar material joint deforms unevenly and the plastic deformation levels of brazing seam and HAZ are the least, while the base material with higher yield limit of dissimilar material joints hardly deforms plastically. The lap joint produces “bending effect” under the action of tensile load and the bending degree decreases with the increase of yield limit of base material. The fracture of butt joints results from the pure tension strees, while the fracture of lap joints is the corporate result of shear stress and tension stress.