모재의 방향성에 따른 마찰교반용접 판재의 성형성에 관한 실험적 연구

다국어 초록 (Multilingual Abstract)

In order to investigate the formability of friction stir welded(FSW) tailor welded blanks(TWB) with respect to the base material’s directional combination, aluminum alloy AA6111-T4 sheets were welded with three different conjoining types: RD-RD, TD-RD and TD-TD. Here, RD and TD represent rolling and transverse directions, respectively. For experimental formability study, three tests with gradual complexity were performed: the simple tension test with various weld line directions for uni-axial elongation, the hemisphere dome stretching test for biaxial stretching and the cylindrical cup deep drawing test. As a result, all three forming tests showed that RD-RD type samples exhibited the best formability, while TD-TD type sheets showed the least formability performance.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 용접 조건 및 기계적 물성
• 3. 성형성 평가
• 4. 결론
• 참고문헌

참고문헌 (Reference)

1 K. Abdullah, "Tensile testing for weld deformation properties in similar gage tailor welded blanks using the rule of mixtures" 112 : 91-97, 2001

2 W. Gan, "Properties of friction-stir welded aluminum alloys 6111 and 5083" 130 : 031007-, 2008

3 J.-H. Cho, "Modeling Friction Stir Welding Process of Aluminum Alloys" 대한금속·재료학회 14 (14): 247-258, 2008

4 김상식, "Mechanical Properties of Friction Stir Welded Al Alloys with Different Hardening Mechanisms" 대한금속·재료학회 11 (11): 113-121, 2005

5 M. W. Thomas, "GB Patent Applications No. 9125978.8, Dec. 1991; US Patent No. 5460317, Oct. 1995"

6 K. V. Jata, "Friction stir welding and processing I" A Publication of TMS 2001

7 M. C. Stasik, "Forming of tailor-welded aluminum blanks" 1 : 9-34, 1998

8 W. Lee, "Experimental and numerical study on formability of friction stir welded TWB sheets based on hemispherical dome stretch tests" 10.1016 /j.ijplas. 2008.08.005