Studies on the Material Anisotropy Influence in Case of Sheets Made From Magnesium Alloy AZ31B on the Stress Concentration Factor in the Presence of a Circular Concentrator

Abstract:

This paper presents an experimental study regarding the behaviour and the durability o a magnesium alloy sheet designed with a circular stress concentrator, tested for different angles between the tensile direction and the rolling direction of the sample material. To perform this study the experimental tests has been carried out on samples machined for different angles values the material rolling direction and the main axis of the sample: 0°, 15°, 30°, 45°, 60°, 75° and 90°. The experimental tests have been done on samples with and without circular stress concentrator. From the analysis of the obtained results, it can be concluded that the sheet made from magnesium alloy, shows a very pronounced variation of the tensile strength and yield strength depending on the material rolling direction. At the same time, the effect generated by the presence of the circular stress concentrator it is significantly influenced by the anisotropy of the AZ31B magnesium alloy.

• Periodical: Advanced Materials Research (Volume 814)
• Pages: 104-109
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.814.104
• Online since: September 2013
• Authors: Gheorghe Pintilie, Aurelian Albut
• Keywords: Anisotropy, Material Properties, Strain, Stress, Stress Concentration Factor, Tensile Strength, Yield Strength

References

[1] G.S. Cole, Magnesium Vision 2020: A North American automotive strategic vision for magnesium, USAMP report, 2007.

[2] H. Watarai, Trend of research and development of magnesium alloys – reducing the weight of structural materials in motor vehicles, Science and Technology Trends, 18 (2006) 84-97.

[3] M. Tripa, Rezistenta Materialelor Strength of materials, Didactic and Pedagogic Publishing, 1967, Bucharest.

[4] B. Mordike, P. Lukac, PhysicalMetallurgy. Magnesium Technology 2006:63-107.

[5] X.Y. Lou, M. Li, R.K. Boger, S.R. Agnew, R.H. Wagoner, Hardening evolution of AZ31B Mg sheet. Int.J.Plast. 2007 1;23(1):44-86.

DOI: 10.1016/j.ijplas.2006.03.005

[6] M. Yoo, Slip, twinning, and fracture in hexagonal close-packed metals. Metallurgical and Materials TransactionsA 1981 03/01;12(3):409-418.

DOI: 10.1007/bf02648537

[7] J. Koike, T. Kobayashi, T. Mukai, H. Watanabe, M. Suzuki, K. Maruyama, et al. The activity of non-basal slip systems and dynamic recovery at room temperature in fine-grained AZ31B magnesium alloys. ActaMaterialia 2003 4/18;51(7):2055-2065.

DOI: 10.1016/s1359-6454(03)00005-3

[8] S.R. Agnew, M.H. Yoo, C.N. Tomé, Application of texture simulation to understanding mechanical behavior of Mg and solid solution alloys containing Li or Y. Acta Materialia 2001 12/3;49(20):4277-4289.

DOI: 10.1016/s1359-6454(01)00297-x

[9] A. Styczynski, C. Hartig, J. Bohlen, D. Letzig, Cold rolling textures in AZ31 wrought magnesium alloy. Scr.Mater. 2004 4;50(7):943-947.

DOI: 10.1016/j.scriptamat.2004.01.010

[10] H.T. Jeong, T.K. Ha, Texture development in a warm rolled AZ31 magnesium alloy. J.Mater.Process.Technol. 2007 6/12;187-188:559-561.

DOI: 10.1016/j.jmatprotec.2006.11.084

[11] D. Hasenpouth, Tensile High Strain Rate Behavior of AZ31B Magnesium Alloy Sheet, University of Waterloo, Ontario, Canada, 2010.