Based on the general solution to stress equilibrium differential equation and the analytical expressions in mechanical field of superplastic extrusion through cone-shaped die, in this paper the theoretical formulae ha...Based on the general solution to stress equilibrium differential equation and the analytical expressions in mechanical field of superplastic extrusion through cone-shaped die, in this paper the theoretical formulae have been established for the technological processing specifications of non-steady and steady extrusions through cone-shaped die. Experimental results on the typical superplastic alloy Zn-5wt/Al are in good agreement with the theoretical calculations.展开更多
The forward extrusion through cone-shaped die,which is the basis for establishing the extrusion theory,can be simply considered to be two-dimensional in a spherical coordinates system in its treatment.This paper,for t...The forward extrusion through cone-shaped die,which is the basis for establishing the extrusion theory,can be simply considered to be two-dimensional in a spherical coordinates system in its treatment.This paper,for the first time,derives the analytical formulae and constraint equations for strain,strain-rate and stress of superplastic extrusions through cone-shaped die by simulating displacement function.In the present work,typical superplastic alloy Zn-5wt%Al was chosen as the example,so the results are of universal significance.The method can even be generalized to non-typical superplastic materials.展开更多
文摘Based on the general solution to stress equilibrium differential equation and the analytical expressions in mechanical field of superplastic extrusion through cone-shaped die, in this paper the theoretical formulae have been established for the technological processing specifications of non-steady and steady extrusions through cone-shaped die. Experimental results on the typical superplastic alloy Zn-5wt/Al are in good agreement with the theoretical calculations.
文摘The forward extrusion through cone-shaped die,which is the basis for establishing the extrusion theory,can be simply considered to be two-dimensional in a spherical coordinates system in its treatment.This paper,for the first time,derives the analytical formulae and constraint equations for strain,strain-rate and stress of superplastic extrusions through cone-shaped die by simulating displacement function.In the present work,typical superplastic alloy Zn-5wt%Al was chosen as the example,so the results are of universal significance.The method can even be generalized to non-typical superplastic materials.
