Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Improvement of R-value in Al-Mg-Si-Cu Alloy Sheets by Cross Rolling

크로스 압연에 의한 Al-Mg-Si-Cu 합금 판재의 소성변형비의 향상

  • Lee, Kwang-jin (Automotive Components R&D Group, Korea Institute of Industrial Technology) ;
  • Jeon, Jae-yeol (Automotive Components R&D Group, Korea Institute of Industrial Technology, Division of Advanced Materials Science & Research Center for Industrial Technology) ;
  • Woo, Kee-do (Automotive Components R&D Group, Korea Institute of Industrial Technology)
  • 이광진 (한국생산기술연구원 동력부품연구그룹) ;
  • 전재열 (한국생산기술연구원 동력부품연구그룹, 전북대학교신소재공학부공업기술연구센터) ;
  • 우기도 (한국생산기술연구원 동력부품연구그룹)
  • Received : 2011.03.02
  • Published : 2011.06.25
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Abstract

Heat-treatable Al-Mg-Si-Cu alloy sheets, which are expected to have a growing demand, were fabricated by Cross rolling to improve their formability. The mechanical properties and texture of the sheets after the final annealing process were investigated by a tensile test, EBSD and XRD analysis. The grain size of the cross-rolled sheets was remarkably decreased compared to conventional rolled sheets, and the R-value of the cross-rolled sheets was notably increased by about one and a half times that of the conventional rolled sheet. Cube{001}<100> and cubic system orientations were strongly developed in conventional rolled sheets. However, randomized textures were formed in the cross-rolled sheets without specific texture. It is thought that much shear deformation was induced during the cross rolling. The results show that the cross rolling method is effective for improving the R-value of aluminum alloys sheets and their grain refinement. As a result, it is considered that cross rolling is effective for improving formability.

Keywords

Acknowledgement

Grant : 첨단부품소재 인프라구축사업

Supported by : 한국생산기술연구원

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