Badania energochłonności struktur wykonanych ze stopów magnezu

• Autorzy: Kaczyński P. , Bartczak B. , Gronostajski Z. , Polak S.

Identyfikatory

DOI

10.15 199/67.2015.12.9

Warianty tytułu

EN

The study of crashworthiness of structures made of magnesium alloys

• Języki publikacji: PL

Abstrakty

PL

Artykuł przedstawia badania energochłonności cienkościennych struktur energochłonnych wykonanych ze stopu magnezu AZ31. Badany materiał pęka krucho podczas zginania w temperaturze otoczenia. Ten powszechnie znany problem utrudnia obróbkę plastyczną stopów magnezu i ich wykorzystanie w produkcji elementów energochłonnych. W pracy wykazano, iż zastosowanie odpowiedniego kształtu geometrycznego pozwala na kontrolę procesu dynamicznego zgniatania i aktywowanie nowego mechanizmu pochłaniania energii, jakim jest progresywne kruszenie.

EN

Magnesium is the eighth most common element on earth. Its content in the earth's crust is 2.1 %. Today, China produces about 80 % of magnesium worldwide. It is primarily used as: an alloying addition to aluminum castings (41 %), the material for castings and sheets (32 %), the material for desulfurization of steel alloys (14%) and for other purposes (14 %) [1]. Global demand for this element is expected to reach 1 270 000 tons, which is an increase of 42 % compared to 2015 [2]. Magnesium alloys are the third most commonly used material for the construction of the structural elements, right after steel alloys and aluminum alloys. Because density of magnesium equals to about ¼ of steel density and ⅔ of aluminum density it is one of the lightest metals. This allows for its use in the automotive industry, aerospace industry, power industry and other industries that pus special emphasis on construction weight reduction. A good example is the increased use of magnesium components by major automotive companies, including General Motors (GM), Ford, Volkswagen and Toyota [3÷10]. However, the weight of magnesium components in a typical family sedan car in North America equals only to 0.3 % of the total weight of the vehicle. The reason for this state is the problem with the plastic forming of magnesium elements and the behavior of the material during impact. Sheets made of magnesium alloys cracks brittle during bending. This material is considered to be unsuitable for the construction of energy-absorbing elements, which absorb energy by plastic folding. This study demonstrate that the use of appropriate geometric shape allows to control the dynamic crushing process and activation of a new mechanism which is progressive crushing.

Słowa kluczowe

PL

element energochłonny; pochłanianie energii; stop magnezu; AZ31

EN

Crash-box; crashworthiness; magnesium alloys; AZ31

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Rudy i Metale Nieżelazne Recykling
• Rocznik: 2015
• Tom: R. 60, nr 12
• Strony: 699--706
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Kaczyński P.

• Politechnika Wrocławska, Katedra Obróbki Plastycznej i Metrologii, Wrocław

autor

Bartczak B.

• Politechnika Wrocławska, Katedra Obróbki Plastycznej i Metrologii, Wrocław

autor

Gronostajski Z.

• Politechnika Wrocławska, Katedra Obróbki Plastycznej i Metrologii, Wrocław

autor

Polak S.

• Politechnika Wrocławska, Katedra Obróbki Plastycznej i Metrologii, Wrocław

Bibliografia

• 1. U.S. Geological Survey Mineral Commodity Summaries — Magnesium Metal (January 2011), pp. 98÷99 http://minerals.usgs.gov/minerals/pubs/commodity/magnesium/mcs-2011-mgmet. pdf.
• 2. Japan Metal Bulletin, Jun 2012, nonferrous metal.
• 3. Taub A. I., Krajewski P. E., Luo A. A., Owens J. N.: The evolution of technology for materials processing over the last 50 years: the automotive example JOM Journal of Metals, 2007, vol. 59, no. 2, pp. 48÷57.
• 4. Kainer K. U.: Magnesium-Alloys and Technologies Wiley- VCH, Weinheim, Germany 2003.
• 5. Luo A. A.: Magnesium: current and potential automotive applications JOM Journal of Metals, 2002, vol. 54, no. 2, pp. 42÷48.
• 6. Becker H.-H.: Status, potential and challenges for automotive magnesium applications from the point of view of an OEM presentation at 65th Annual World Magnesium Conference Warsaw, Poland 2008.
• 7. Michiura Y.: Current magnesium research and application in automotive industry in Japan presentation at International Automotive Body Congress, November 7-8Troy, MI, USA 2007.
• 8. Balzer J. S., Dellock P. K., Maj M. H., Cole G. S., Reed D., Davis T., Lawson T., Simonds G.: Structural Magnesium Front End Support SAE International, Warrendale, PA (2003) SAE Technical Paper 2003-01-0185.
• 9. Hoeschl M., Wagener W., Wolf J.: BMW's Magnesium- Aluminium Composite Crankcase State-of-the-Art Light Metal Casting and Manufacturing SAE International, Warrendale, PA (2006) SAE Technical Paper 2006-01-0069
• 10. Duke C. J., Logan S.: Lightweight magnesium spare tire carrier Proceedings of the 64th Annual World Magnesium Conference, International Magnesium Association 2007, pp. 75÷80 Wauconda, IL 6 0084 , USA.