Development of warm forming parts for automotive body dash panel using AZ31B magnesium alloy sheets

Dong-Hwan Park1, Hyuk-Hong Kwon2
1Gyeongbuk Hybrid Technology Institute, Gyeongsangbuk-do, South Korea
2Department of Computer Aided Mechanical Design Engineering, Daejin University, Gyeonggi-do, South Korea

Tóm tắt

According to current development trends for automotive parts, light-weight is a key issue in improving fuel efficiency and CO2 reduction. Compared to steel and aluminum, magnesium has a relatively low specific gravity. However, it is challenging to use magnesium to produce a product at room temperature because magnesium has a hexagonal close-packed crystal structure. Therefore, the structure is not suitable for plastic deformation without using a heating system. As a result, a magnesium alloy sheet and die need to be heated from 250 to 300ºC. This paper presents the development of warm forming technology for automotive dash panel using magnesium alloy sheet.

Tài liệu tham khảo

Choi, S.-S., “Prediction of Fatigue Design Life in Magnesium Alloy by Failure Probability,” Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 19, No. 6, pp. 804–811, 2010. Choi, S.-S., “Effect of Specimen Thickness on Probability Distribution of Fatigue Crack Propagation Behavior in Magnesium Alloy AZ31,” Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 18, No. 4, pp. 395–400, 2009. Kim, H. K., Kim, J. D., Heo, Y. M., and Kim, W. J., “A Comparative Study of Failure Criteria for Magnesium Alloy Sheet Under Warm Press Forming Condition,” Transactions of Materials Processing, Vol. 21, No. 2, pp. 113–118, 2012. Kim, S. W. and Lee, Y. S., “Failure Prediction for an AZ31 Alloy Sheet during Warm Drawing using FEM Combined with Ductile Fracture Criteria,” Transactions of Materials Processing, Vol. 21, No. 4, pp. 258–264, 2012. Lee, M. G. and Kim, H. J., “Experimental and Analytical Evaluation of Forming Characteristics for AZ31B Magnesium Alloy Sheet,” Transactions of Materials Processing, Vol. 20, No. 2, pp. 146–153, 2011. Han, S. S. and Lee, M. Y., “Numerical Study of the Butting Process for a AZ31B Magnesium Alloy Tube,” Transactions of Materials Processing, Vol. 22, No. 8, pp. 486–491, 2013. Kim, D. O., Kang, C. W., and Lee, S. Y., “The Study of the Variation of Strain Rate Sensitivity Index Depending on the Strain and Microstructural Observations of AZ31 Mg Alloy Sheet,” Transactions of Materials Processing, Vol. 20, No. 7, pp. 498–503, 2011. Song, W. J., Heo, S. C., Ku, T. W., Kang, B. S., and Kim, J., “Evaluation of Strain, Strain Rate and Temperature Dependent Flow Stress Model for Magnesium Alloy Sheets,” Transactions of Materials Processing, Vol. 20, No. 3, pp. 229–235, 2011. Jang, D. H., “Process Development for Automotive Hybrid Hood using Magnesium Alloy AZ31B Sheet,” Transactions of Materials Processing, Vol. 20, No. 2, pp. 160–166, 2011. Kim, E.-S., “A Study of Optimal Design for Mg Armrest Frame by using Response Surface Method,” Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 21, No. 5, pp. 797–804, 2012. Choi, S. C., Kim, H. Y., Hong, S. M., Shin, Y. S., Lee, G. H., and Kim, H. J., “Evaluation And Prediction of the Forming Limit of AZ31B Magnesium Alloy Sheets in a Cross-Shaped Cup Deep Drawing Process,” Metals and Materials International, Vol. 15, No. 4, pp. 575–584, 2009.