마그네슘 합금 판재 (AZ31)의 온도별 특성 분석
A study on forming characteristics of magnesium alloy (AZ31) on various temperatures
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Recently, in the surge of global environmental issues, there has been a great attention to lightweight materials in purpose of saving energy. Magnesium alloys not only have low specific gravity, and superb specific stiffness, but are also excellent in blocking vibrations and electromagnetic waves. So demand for this material is getting bigger rapidly throughout the industry. In this study, we examined the improvement of formability of magnesium alloy AZ31 material in warm working. Drawing, bending and shearing process were carried out by varying the forming temperature and the forming speed, and the influence of the variables on each process was studied. In the experiments, the high forming temperature and low forming speed results in high formability in the drawing process and the bending process. In the shearing process, as the forming temperature increases, the length of the fracture decreases
Abstract
Recently, in the surge of global environmental issues, there has been a great attention to lightweight materials in purpose of saving energy. Magnesium alloys not only have low specific gravity, and superb specific stiffness, but are also excellent in blocking vibrations and electromagnetic waves. So demand for this material is getting bigger rapidly throughout the industry. In this study, we examined the improvement of formability of magnesium alloy AZ31 material in warm working. Drawing, bending and shearing process were carried out by varying the forming temperature and the forming speed, and the influence of the variables on each process was studied. In the experiments, the high forming temperature and low forming speed results in high formability in the drawing process and the bending process. In the shearing process, as the forming temperature increases, the length of the fracture decreases
참고문헌 (5)
- Y. G. LEE, "A Study on the Warm Deep Drawability of Mg-Alloy Sheet Metal", Master, pp.2004
- J. H. Park, "A development of temperature dependent constitutive equation for Magnesium alloy sheet regarding twinning behavior", Ph. D, pp.2016
- B. K. Raghunath, "Flow stress modeling of AZ91 magnesium alloy at elevated temperature", Journal of Alloys and Compounds, 509, pp.4992~4998 (2011)
- T. Obara, "Slip system in magnesium", Acta Metallurgica, 21, pp.845~858 (1973)
- 최일동, "자동차용 고속변형거동에 대한 예비변형과 소부경화의 영향", 대한금속·재료학회지, 43(4), pp.263~269 (2005), 대한금속·재료학회