Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Infrared Local Heat Treatment of Curved Line for Aluminum Alloy Sheet

알루미늄 판재의 성형성 향상을 위한 적외선 국부 열처리법의 곡선형태 적용에 관한 연구

  • 이은호 (한동대학교 기계제어공학부) ;
  • 양동열 (한국과학기술원 기계공학과)
  • Received : 2017.10.16
  • Accepted : 2018.02.28
  • Published : 2018.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

Auto industries have tried to employ lightweight alloys to improve the fuel efficiency of manufactured vehicles, as the environmental concern becomes an important issue. Even though the aluminum alloy is one of the most appropriate lightweight alloys for auto parts, the low formability of an aluminum alloy has been an obstacle to its application. In order to resolve the low formability problem, a recent study (Lee et al., 2017 [1]) showed that the infrared (IR) local heat treatment can improve the formability with a reduction of heating energy. However, the aforementioned study was limited to only a linear line heating. Since many of the available auto parts as applicable to vehicle manufacturing have a curved line shape, the heating experiments for a curved line should be studied. The possibility of building IR lamps having complex shapes is an advantage of the IR lamp, since it can control the heating shape. This work conducted the IR local heat treatment for the curved line. The experimental results show that the IR local heat treatment can improve the formability of the aluminum alloy for curved line. Additionally, it is shown that the IR local heat treatment also reduces the heating energy when it is compared with the furnace heating which heats a blank as a whole. A numerical simulation with a stress-based forming limit diagram also supports the experimental results.

Keywords

References

  1. E. H. Lee, D. Y. Yang, S. J. Ko, 2017, A study on infrared local heat treatment for AA5083 to improve formability and automotive part forming, J. Mater. Eng. Perform., Vol. 26, pp. 5056-5063. https://doi.org/10.1007/s11665-017-2945-7
  2. M. Tiryakioglu, J. S. Robinson, M. A. Salazar-Guapuriche, Y. Y. Zhao, P. D. Eason, 2015, Hardness- strength relationships in the aluminum alloy 7010, Mater. Sci. Eng.: A, Vol. 631, pp. 196-200. https://doi.org/10.1016/j.msea.2015.02.049
  3. P. A. Stathers, A. K. Hellier, R. P. Harrison, M. I. Ripley, J. Norrish, 2014, Hardness-Tensile Property Relationships for HAZ in 6061-T651 Aluminum, Welding Journal, Vol. 93, pp. 301-311
  4. S. Golovashchenko, A. Krause, 2005, Improvement of formability of 6xxx aluminum alloys using incremental forming technology, J. Mater. Eng. Perform., Vol. 14, pp. 503-507. https://doi.org/10.1361/105994905X56133
  5. M. Verdier, M. Janacek, Y. Bréchet, and P. Guyot, 1998, Microstructural evolution during recovery in Al-2.5%Mg alloys, Mater. Sci. Eng. A, Vol. 248, pp. 187-197. https://doi.org/10.1016/S0921-5093(98)00488-2
  6. T. J. Kim, D. Y. Yang, 2007, FE-analysis of sheet metal forming processes using continuous contact treatment. Int. J. Plast., Vol. 23, pp. 544-560. https://doi.org/10.1016/j.ijplas.2006.07.004
  7. J. B. Kim, J. W. Yoon, D. Y. Yang, 2000, Wrinkling initiation and growth in modified Yoshida buckling test: finite element analysis and experimental comparison. Int. J. Mech. Sci., Vol. 42, pp. 1683-1714. https://doi.org/10.1016/S0020-7403(99)00046-6
  8. E. H. Lee, D. Y. Yang, J. W. Yoon, W. H. Yang, 2015, Numerical modeling and analysis for forming process of dual-phase 980 steel exposed to infrared local heating, Int. J. Solids. Struct., Vol. 75-76, pp. 211-224. https://doi.org/10.1016/j.ijsolstr.2015.08.014
  9. H. J. Kleemola, M. T. Pelkkikangas, 1977, Effect of predeformation and strain path on the forming limits of steel, copper and brass. Sheet. Met. Ind., Vol. 64, pp. 591-592
  10. R. Arrieux, C. Bedrin, M. Boivin, 1982, Determination of an intrinsic forming limit stress diagram for isotropic sheets. In Proceedings of the 12th IDDRG Congress, Vol. 2, pp. 61-71
  11. T.B. Stoughton, 2000, A general forming limit criterion for sheet metal forming. Int. J. Mech. Sci., Vol. 42, pp. 1-27. https://doi.org/10.1016/S0020-7403(98)00113-1
  12. J. Li, J. E. Carsley, T. B. Stoughton, L. G. Hector, S. J. Hu, 2013, Forming limit analysis for two-stage forming of 5182-O aluminum sheet with intermediate annealing, Int. J. Plast., Vol. 45, pp. 21-43.