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Metallurgical and Materials Transactions A

, Volume 46, Issue 1, pp 260–269 | Cite as

Plastic Deformation Behavior and Microstructural Evolution of Al-Core/Cu-Sheath Composites in Multi-pass Caliber Rolling

  • Jung Gi Kim
  • Marat I. Latypov
  • Dong Jun Lee
  • Ha-Guk Jeong
  • Jong Beom Lee
  • Sunghak Lee
  • Hyoung Seop Kim
Article

Abstract

Plastic deformation behavior and microstructural evolution of an Al-core/Cu-sheath composite during multi-pass caliber rolling are investigated using the finite element simulations and experimental analyses. The simulated equivalent plastic strains generated by 1 to 7 pass caliber rolling are correlated with the hardness values and microstructures measured in the longitudinal cross sections of the specimens. The average strains developed in the Al-core and Cu-sheath are almost identical, which satisfy the quasi-isostrain condition in composites with inner soft and outer hard materials. Both the Al-core and Cu-sheath exhibit increasing hardness, but decreasing hardening rates with an increase in the number of passes. The increasing hardness with an increase in the number of caliber rolling passes is attributable to the combined effect of increased dislocation density and decreased grain size. The simulated results for the hardness were shown to be in good agreement with the experimental data for Cu and Al. It was concluded that the finite element method is well placed as a tool for describing and predicting deformation behaviors during caliber rolling.

Keywords

Dislocation Density Misorientation Angle Equivalent Strain Equivalent Plastic Strain Finite Element Method Simulation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This study was supported by a Grant from the Fundamental R&D Program for Core Technology of Materials (10037206) funded by the Ministry of Knowledge Economy, Korea. A helpful discussion about CMWP analyses with Prof. Tamas Ungar is greatly appreciated.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2014

Authors and Affiliations

  • Jung Gi Kim
    • 1
  • Marat I. Latypov
    • 3
  • Dong Jun Lee
    • 3
  • Ha-Guk Jeong
    • 2
  • Jong Beom Lee
    • 2
  • Sunghak Lee
    • 3
  • Hyoung Seop Kim
    • 3
  1. 1.Department of Materials Science and EngineeringPohang University of Science and Technology (POSTECH)PohangSouth Korea
  2. 2.Production Technology R&D DepartmentKorea Institute of Industrial Technology (KITECH)IncheonSouth Korea
  3. 3.Center for Advanced Aerospace MaterialsPohang University of Science and TechnologyPohangSouth Korea

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