Anisotropic Behaviour of AZ31B Sheet at High Strain Rates

Abstract:

The anisotropic effects on the mechanical response of AZ31B sheet at high strain rates have been analyzed. The experimental results indicate that the stress-strain behaviour of the alloy is highly anisotropic and rate sensitive. However, anisotropy of the mechanical properties of the alloy is less significant at higher strain rates. Under tensile loading, the anisotropic behaviour of the alloy is less significant as compare to its behaviour under compression. In both compression and tensile loading the alloy shows significant rate sensitivity as compare to quasi-static strain rates but at higher rates it is less significant. The maximum stress is observed to reach nearly 600 MPa for transverse direction impact. The tension-compression asymmetry is observed in the alloy.

• Periodical: Applied Mechanics and Materials (Volume 151)
• Pages: 726-730
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.151.726
• Online since: January 2012
• Authors: Iram Raza Ahmad, Dong Wei Shu
• Keywords: Anisotropy, AZ31B Alloy, Hopkinson Bar, Magnesium Alloy, Specific Energy

References

[1] H. Watarai. Trends of Research and Development for Magnesium Alloys – Reducing the Weight of Structural Materials in Motor Vehicles. Science and Technology Trends, Quarterly Review, No. 18 (2006).

[2] I. Ostrovdky, Y. Henn. Present state and Future of Magnesium Application in Aerospace Industry. Int. Conference New Challenges in Aeronautics" ASTEC, 07, Moscow, (2007).

[3] T. Yokoyama. Impact Tensile Stress-strain Characteristics of Wrought Magnesium Alloys. Strain, Vol. 39 (2003) pp.167-75.

DOI: 10.1046/j.1475-1305.2003.00086.x

[4] K. Ishikawa, H. Watanabe, T. Mukai. High temperature compressive properties over a wide range of strain rates in an AZ31 magnesium alloy. Journal of Materials Science, Vol. 40 (2005) pp.1577-82.

DOI: 10.1007/s10853-005-0656-1

[5] T. Cheng-wan, Xu Shan-na, Lu Wang, C. Zhi-yong, W. Fu-chi, C. Hong-nian, Ma Hong-lei. Deformation behaviour of AZ31 magnesium alloy at different strain rates and temperatures. Transactions of Nonferrous Metals Society of China, 17 (2007).

[6] Suyuan, Y. 2010. The Microstructure Features and the Deformation Mechanism of a Fine Grained Magnesium Alloy under Dynamic Loading. Rev. Adv. Mater. Sci. 25, pp.122-127.

[7] Yang Yong-biao, W. Fu-chi, T. Cheng-wen, Wu Yuan-yuan, C . Hong-nian. Plastic deformation mechanism of AZ31 magnesium alloy under high strain rate compression. Nonferrous Metal Society China, Vol. 18 (2008) pp.1043-46.

DOI: 10.1016/s1003-6326(08)60178-8

[8] M. T. Tucker, M. F. Horstemeyer, P. M. Gullett, Haithem El Kadiri, W. R. Whittington. Anisotropic effects on the strain rate dependence of a wrought magnesium alloy. Scripta Materialia, Vol. 60 (2009) pp.182-85.

DOI: 10.1016/j.scriptamat.2008.10.011

[9] I. Ulacia, S. Yi, M. T. Perez-Prado, N. V. Dudamell, F. Galvez, D. Letzig, and I. Hurtado, Texture Evaluation of AZ31 Magnesium Alloy Sheet at High Strain Rates. A report based on the results of MAGNO2008 and MANUFACTURING Projects (2010).

DOI: 10.4028/www.scientific.net/msf.706-709.1255

[10] I. Ulacia, C. P. Salisbury, I. Hurtado, M. J. Worwick. Tensile characterization and constitutive modeling of AZ31B magnesium alloy sheet over a wide range of strain rates and temperatures. Journal of Materials Processing Technology, 211(2011).

DOI: 10.1016/j.jmatprotec.2010.09.010

[11] D. Hasenpouth, C. Salisbury, A. Bardelcik, M. J. Worwick. Constitutive behaviour of magnesium alloy sheet at high strain rates. A report.

DOI: 10.1051/dymat/2009202

[12] H. Kolsky. An investigation of the mechanical properties at very high strain rates of loading. Proc. Phys. Soc. B. Vol. 62 (1949) pp.676-701.

DOI: 10.1088/0370-1301/62/11/302

[13] E. Sukedai, T. Yokoyama. Investigation of tensile-compressive yield asymmetry and the role of deformation twin in extruded pure magnesium. Int. J. Mat. Res. 101 (2010), pp.736-740.

DOI: 10.3139/146.110332