Effects of Texture on Tensile Property of Extruded AZ31 Magnesium Alloy Investigated by Acoustic Emission

Abstract:

In this paper, effects of texture on tensile property of extruded AZ31 magnesium alloy are investigated by acoustic emission (AE). The results show that the extruded AZ31 magnesium alloy used in this research has the strong texture of and tensile anisotropy. The yield strength of TD-sample is about 80MPa, which is half of that of ED-sample. AE results show that the AE count of the TD-sample is higher than that of the ED-sample. These AE results suggest that there are more deformation twins in the TD-sample than in the ED-sample. It can be concluded that the deformation twinning can strongly influence the anisotropy, which is mainly due to the flow stress relief induced by twinning and the interaction of twins and dislocations during the strain hardening.

• Periodical: Materials Science Forum (Volumes 747-748)
• Pages: 340-345
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.747-748.340
• Online since: February 2013
• Authors: Chuan Kai Sun, Hong Yun Luo, Zhi Yuan Han
• Keywords: Acoustic Emission (AE), AZ31 Magnesium Alloy, Tensile Properties, Texture

References

[1] M.M. Avedesian, H. Baker, Magnesium and Magnesium Alloys — ASM Speciality Handbook, ASM International, Ohio, (1999).

[2] B.L. Mordike, T. Ebert, Magnesium: Properties — applications — potential, Mater. Sci. Eng., A 302 (2001) 37-45.

[3] D.S. Mehta, S.H. Masood, W.Q. Song, Investigation of wear properties of magnesium and aluminum alloys for automotive applications, J. Mater. Process. Technol. 156 (2004) 1526-1531.

DOI: 10.1016/j.jmatprotec.2004.04.247

[4] R.B. Figueiredo, T.G. Langdon, Principles of grain refinement and superplastic flow in magnesium alloys processed by ECAP, Mater. Sci. Eng., A 501 (2009) 105-114.

DOI: 10.1016/j.msea.2008.09.058

[5] D.G. Kim, K.M. Lee, J.S. Lee, Y.O. Yoon, H.T. Son, Evolution of microstructures and textures in magnesium AZ31 alloys deformed by normal and cross-roll rolling, Mater. Lett. 75 (2012) 122-125.

DOI: 10.1016/j.matlet.2012.01.141

[6] Q.Y. Long, H.Z. Yin, Acoustic emission during deformation of dual-phase steels, Metall. Mater. Trans. A 21 (1990) 373-379.

[7] M. Friesel, S.H. Carpenter, Determination of the sources of acoustic emission generated during the deformation of magnesium, J. Acous. Emis., 3(1), pp.11-17.

[8] E. Siegel, Burst Acoustic Emission During the Bauschinger Effect in F.C.C. and H.C.P. Metals and Alloys , Proceedings of the IEEE Ultrasonic Symposium, Monterey, CA, 1973, pp.204-208.

DOI: 10.1109/ultsym.1973.196183

[9] R. Gehrman, M.M. Frommert, G. Gottstein, Texture effects on plastic deformation of magnesium, Mater. Sci. Eng., A395 (2005) 338-349.

[10] A. Staroselsky, L. Anand, A constitutive model for hcp materials deforming by slip and twinning: application to magnesium alloy AZ31B, Int. J. Plast. 19 (2003) 1843-1864.

DOI: 10.1016/s0749-6419(03)00039-1

[11] Y. Chino, K. Kimura, M. Hakamada, M. Mabuchi, Mechanical anisotropy due to twinning in an extruded AZ31 Mg alloy, Mater. Sci. Eng., A485 (2008) 311-317.

DOI: 10.1016/j.msea.2007.07.076

[12] S.M. Yin, S.D. Wu, S.X. Li, Tensile-compressive yield asymmetry and microstructure evolution during deformation of coarse-grained AZ31D magnesium alloy, Chinese Journal of Materials Research, 21 (2007 )38-42.

[13] P. Dobroň, J. Bohlen, F. Chmelík, P. Lukáč, D. Letzig, K.U. Kainer, Acoustic emission during stress relaxation of pure magnesium and AZ magnesium alloys, Mater. Sci. Eng., A 462 (2007) 307-310.

DOI: 10.1016/j.msea.2005.12.111

[14] Z.Y. Han, H.Y. Luo, H.W. Wang, Effects of strain rate and notch on acoustic emission during the tensile deformation of a discontinuous yielding material, Mater. Sci. Eng., A528 (2011) 4372-4380.

DOI: 10.1016/j.msea.2011.02.042

[15] A. Vinogradov, D.L. Merson, V. Patlan, S. Hashimoto, Effect of solid solution hardening and stacking fault energy on plastic flow and acoustic emission in Cu/Ge alloys, Mater. Sci. Eng., A341 (2003) 57-73.

DOI: 10.1016/s0921-5093(02)00214-9

[16] P. Antonaci, P. Bocca, D. Masera, Fatigue crack propagation monitoring by Acoustic Emission signal analysis, Eng. Fract. MECH. 81 (2012) 26-32.

DOI: 10.1016/j.engfracmech.2011.09.017

[17] G. Kalogiannakis, J. Quintelier, P. De Baets, J. Degrieck, D. Van Hemelrijck, Identification of wear mechanisms of glass/polyester composites by means of acoustic emission, Wear 264 (2008) 235-244.

DOI: 10.1016/j.wear.2007.03.019

[18] Y.P. Li, M. Enoki, Twinning behavior of pure magnesium quantitatively investigated by acoustic emission, Mater. Sci. Eng., A536 (2012) 8-13.

DOI: 10.1016/j.msea.2011.10.010