This study investigates the directional recrystallization behavior of Ni based oxide dispersion strengthened (ODS) alloy according to the zone annealing velocity. The zone annealing temperature is set as 1390oC, while the zone velocities are set as 2.5, 4, 6, and 10 cm/h, respectively. The initial microstructure observation of the as-extruded sample shows equiaxed grains of random orientation, with an average grain size of 530 nm. On the other hand, the zone annealed samples show a large deviation in grain size depending on the zone velocities. In particular, grains with a size of several millimeters are observed at 2.5-cm/h zone velocity. It is also found that the preferred orientation varies with the zone annealing velocity. On the basis of these results, this study discusses the role of zone velocities in the directional recrystallization of Ni base ODS alloy.

Abstract
 1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
 4. 결 론
 References

• 김영균(인하대학교 신소재공학과) | Young-Kyun Kim (Department of Materials Science and Engineering, Inha University)
• 윤성준(인하대학교 신소재공학과) | Seong-June Yoon (Department of Materials Science and Engineering, Inha University)
• 박종관(대한소결금속주(주)) | Jong-Kwan Park (R&D Center, Korea Sintered Metal Co., Ltd.)
• 김휘준(생산기술연구원) | Hwi-Jun Kim (Korea Institute of Industrial Technology)
• 공만식(고등기술연구원) | Man-Sik Kong (Institute for Advanced Engineering)
• 이기안(인하대학교 신소재공학과) | Kee-Ahn Lee (Department of Materials Science and Engineering, Inha University) Corresponding Author