Plastic Deformation and Plastic Deformation Work of TC4 Alloy under Condition of Confining Pressure in the Heating Process
Equivalent plastic compress deformention (EPCD) is produced because the constraited workpicce has no expansion in the heating process of the solid-state welding.The experimental tests on EPCD and plastic deformention work of TC4 alloy's were carried out.The results show that the heating temperature T and the prepressing stress σ_0 are mainly related to equivalent plastic compress strain e and plastic deformention work W:if σ_0 is constant,e increases linearly with T rising when T is higher(≥700℃),and e increases little with T rising when T is lowerer (≤700℃),meanwhile,W decreases with T rising;If T is invariable,both e and W increase with σ_0 increasing;In assition,if T and σ_0 are constant,W increases with e increasing,and the curve of W-e seems like parabola.