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냉간압연접합법에 의해 제조된 AA1050/AA6061/AA1050 층상 복합판재의 미세조직 및 기계적 성질 KCI 등재 SCOPUS

Microstructure and Mechanical Properties of AA1050/AA6061/AA1050 Complex Sheet Fabricated by Roll Bonding Process

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

A cold roll-bonding process was applied to fabricate an AA1050/AA6061/AA1050 laminate complex sheet. Two AA1050 and one AA6061 sheets of 2 mm thickness, 40 mm width and 300 mm length were stacked up after surface treatment that included degreasing and wire brushing; material was then reduced to a thickness of 3 mm by one-pass cold rolling. The laminate sheet bonded by the rolling was further reduced to 1.2 mm in thickness by conventional rolling. The rolling was performed at ambient temperature without lubricant using a 2-high mill with a roll diameter of 210 mm. The rolling speed was 5.0 m/sec. The AA1050/AA6061/AA1050 laminate complex sheet fabricated by roll bonding was then hardened by natural aging T4) and artificial aging (T6) treatments. The microstructures of the as-roll bonded and the age hardened Al complex sheets were revealed by optical microscope observation; the mechanical properties were investigated by tensile testing and hardness testing. The strength of the as-roll bonded complex sheet was found to increase by 2.9 times compared to that value of the starting material. In addition, the hardness of the complex sheets increased with cold rolling for AA1050 and age-hardening treatment for AA6061, respectively. After heat treatment, both AA1050 and AA6061 showed typical recrystallization structures in which the grains were equiaxed; however, the grain size was smaller in AA6061 than in AA1050.

목차
1. 서 론
 2. 실험 방법
  2.1 압연접합(Roll-Bonding)
  2.2 압연 후 열처리
  2.3 특성 평가
 3. 결과 및 고찰
  3.1 광학현미경 조직
  3.2 기계적 성질
 4. 결 론
 Acknowledgement
 References
저자
  • 안무종(국립목포대학교 신소재공학과) | Moo-Jong Ahn
  • 유효상(한국생산기술연구원) | Hyo-Sang You
  • 이성희(국립목포대학교 신소재공학과) | Seong-Hee Lee Corresponding author