Abstract
The authors performing some experiments on extruded super duralumin, found a peculiar micro-structure, which has given a speculation that the excellent mechanical properties of extruded rod is attributed to particular working process.
To study the cause of excellent properties due to extrusion several examinations were performed, as follows.
1) Crystal flow in the course of extruding process.
2) Relation between mechanical properties of extruded rod and its degree of deformation by areal reduction in extruding work.
3) Orientation of mechanical properties by extruded rod.
4) Influence of preceding forging on the billet of extruding rod.
