Equivalent plastic compress
deformation (EPCD) is produced because the constrained work piece has no expansion in the heating
process of the solid-state welding.The experimental researches on EPCD and its corresponding
plastic deformation work of H62 brass and QCr0.5 bronze's are conducted.The results show that the heating temperature θ and the prepressing stress σ_0 are mainly related to equivalent plastic compress strain ε and plastic
Deformation work W: if σ_0 is invariable,ε increases with θ rising,and to H62 brass,when θ<550℃ or θ>700℃,ε increases linearly with θ rising.Meanwhile,when θ is in the range of 550℃ and 700℃,ε increases more slowly.To QCr0.5,ε increases linearly with θ rising,but it increases more slowly than that of H62's.When θ is constant,ε of the two kinds of copper alloy's increases linearly with σ_0 rising.W of the two kinds of copper alloys decreases with θ rising and increases with σ_0 increasing,but obviously ε of H62's increases more quickly than that of (QCr0.5's).In addition,if θ and σ_0 are unchangeable,W increases with ε increasing,the curve of W-ε seems like parabola.