The annealing characteristics of cold-rolled Al-6.5Mg-1.5Zn-0.5Fe-0.5Mn alloy, newly designed as an automobile material, are investigated in detail, and compared with those of other aluminum alloys. Using multi-pass rolling at room temperature, the ingot aluminum alloy is cut to a thickness of 4 mm, width of 30 mm, and length of 100 mm to reduce the thickness to 1 mm (r = 75 %). Annealing after rolling is performed at various temperatures ranging from 200 to 500 oC for 1 hour. The specimens annealed at temperatures up to 300 oC show a deformation structure; however, from 350 oC they have a recrystallization structure consisting of almost equiaxed grains. The hardness distribution in the thickness direction of the annealed specimens is homogeneous at all annealing temperatures, and their average hardness decreases with increasing annealing temperature. The tensile strength of the as-rolled specimen shows a high value of 496 MPa; however, this value decreases with increasing annealing temperature and becomes 338MPa after annealing at 400 oC. These mechanical properties of the specimens are compared with those of other aluminum alloys, including commercial 5xxx system alloys.

Abstract
1. 서 론
2. 실험방법
    2.1 주괴(as cast)의 냉간압연 및 어닐링
    2.2 특성평가
3. 결과 및 고찰
    3.1 미세조직
    3.2 기계적 성질
4. 결 론
References

• 조상현(국립목포대학교 신소재공학과) | Sang-Hyeon Jo (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