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2016 Vol.26, Issue 12 Preview Page
Recrystallization Behavior of Aluminum Plates Depending on Their Purities

순도에 따른 Al 판재의 재결정 거동

Hyun Woo Lee1
,
Tae Kwon Ha1
,
Hyung-Ki Park2
,
Seok-Hong Min1†
이 현우1
,
하 태권1
,
박 형기2
,
민 석홍1†
1Department of Advanced Metal and Materials Engineering, Gangneung-Wonju National University
2Korea Institute of Industrial Technology, Gangwon Regional Division
1강릉원주대학교 신소재금속공학과
2한국생산기술연구원 강원본부
†Corresponding author E-Mail : shmin@gwnu.ac.kr (S. H. Min, Gangneung-Wonju Nat'l Univ.)
December 2016. pp. 688-695
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Abstract

Recrystallization behavior has been investigated for commercial purity AA1050 (99.5wt%Al) and high purity 3N Al (99.9wt% Al). Samples were cold rolled with 90% of thickness reduction and were annealed isothermally at 290, 315, and 350oC for various times until complete recrystallization was achieved. Hardness measurement and Electron Backscatter Diffraction(EBSD) analyses, combined with Grain Orientation Spread(GOS), were employed to investigate the recrystallization behavior. EBSD analysis combined with GOS were distinctly revealed to be a more useful method to determine the recrystallization fraction and to characterize the recrystallization kinetics. As the annealing temperature increased, recrystallization in AA1050 accelerated more than that process did in Al 3N. Both AA1050 and Al 3N showed the same temperature dependence of the n value of the Johnson-Mehl-Avrami-Kolmogorov equation(JMAK equation), i.e., n values increased as annealing temperature increased. Activation energy of recrystallization in AA1050 is about 176 kJ/mol, which is comparable with the activation energy of grain boundary migration in cold-rolled AA1050. This value is somewhat higher than the activation energy of recrystallization in Al 3N.

Keywords
recrystallization behavior
aluminum
purity
hardness measurement
Grain Orientation Spread(GOS)
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 26
  • No :12
  • Pages :688-695
  • Received Date : 2016-10-10
  • Revised Date : 2016-10-25
  • Accepted Date : 2016-10-31
  • DOI :https://doi.org/10.3740/MRSK.2016.26.12.688
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