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주조 후 냉간 압연된 Al-6.5Mg-1.5Zn계 합금의 어닐링 특성 KCI 등재 SCOPUS

Annealing Characteristics of an Al-6.5Mg-1.5Zn Alloy Cold-Rolled After Casting

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한국재료학회지 (Korean Journal of Materials Research)
한국재료학회 (Materials Research Society Of Korea)
초록

The annealing characteristics of a cold rolled Al-6.5Mg-1.5Zn alloy newly designed as an automobile material is investigated in detail. The aluminum alloy in the ingot state is cut to a thickness of 4 mm, a total width of 30 mm and a length of 100 mm and then reduced to a thickness of 1 mm (reduction of 75%) by multi-pass rolling at room temperature. Annealing after rolling is performed at temperatures ranging from 200 to 400 ℃ for 1 hour. The tensile strength of the annealed material tends to decrease with the annealing temperature and shows a maximum tensile strength of 482MPa in the material annealed at 200 ℃. The tensile elongation of the annealed material increases with the annealing temperature, while the tensile strength does not, and reaches a maximum value of 26 % at the 350 ℃ annealed material. For the microstructure, recovery and recrystallization actively occur as the annealing temperature increases. The recrystallization begins to occur at 300 ℃ and is completed at 350 ℃, which results in the formation of a fine grained structure. After the rolling, the rolling texture of {112}<111>(Cu-Orientation) develops, but after the annealing a specific texture does not develop.

목차
Abstract
 1. 서 론
 2. 실험 방법
  2.1 주괴의 냉간압연 및 어닐링
  2.2 특성평가
 3. 결과 및 고찰
  3.1 미세조직
  3.2 기계적 성질
 4. 결 론
 References
저자
  • 오성준(국립목포대학교 신소재공학과) | Sung-Jun Oh (Department of Advanced Materials Science and Engineering, Mokpo National University)
  • 이성희(국립목포대학교 신소재공학과) | Seong-Hee Lee (Department of Advanced Materials Science and Engineering, Mokpo National University) Corresponding author