Investigation on recrystallization mechanism in single phase fcc metals

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560890
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Material processing/treatments
• Research Institution: University of Hyogo
• Principal Investigator: YAMAMOTO Atsushi 兵庫県立大学, 工学(系)研究科(研究院), 教授 (70220449)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 再結晶 / 圧延 / 回復 / 微細組織解析

Outline of Final Research Achievements

Same area observations by means of SEM-EBSD showed that dislocation cells in deformed matrix directly grew into recrystallized grains with annealing in aluminum alloys and pure copper. It was also observed that with increasing in reduction rate lattice rotation occurred resulting in split into two orientations in each grain when the accumulated reduction rate was larger than about 80 %. Small recrystallized grains having one of the split orientations were formed at the early stage of annealing, which lead to form low angle boundaries between similarly oriented recrystallized grains. Low angle boundaries can not observed with optical microscopy. Similar pole figures would be obtained with X-ray diffraction measurements on the deformed specimen and the specimen in the early stage of annealing, because the recrystallized grains have the orientations of the dislocation cells. Change in pole figures occurs after growth of grains having minor orientations.

Free Research Field

材料組織学