Fundamental Study on Hot Working of Metals (6th Report)

Abstract

Specimens of thin aluminum wires or foils were quenched in very short time of 0.01∼0.04 seconds after the completion of hot working, thus preventing the recrystallization after hot working. Thin wires of aluminum single crystals were also tested in the same manner. We investigated those specimens with X-ray taking Debye-Scherrer rings or Laue spots by K_α-lines of copper. The Debye-Scherrer rings showed remarkable internal stress and grain fragmentation, comparable to those of cold-worked specimens. Evidences of polygonization were found on both the polycrystalline specimens and single crystals, when elongated at very high temperatures. The sign of conventional recrystallization was not found in any of the specimens tested.