Effects of Annealing Treatment on the Microstructure and Mechanical Properties of Magnesium Alloy Sheets

Abstract:

The microstructure of magnesium alloy sheets (nominal composition Mg–6Zn–Y in at. %) was investigated with the Optical Microscope (OM), Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD) technique after the annealing treatment. Tensile test at room temperature was performed to show the influence of annealing treatment on mechanical properties. Experimental results indicate that there are a large number of twin crystals appearing in microstructure of the extruded Mg-Zn-Y alloy sheet at 350 °C. The distinct icosahedral phase appears on the α-Mg matrix in granular form and the strength gets largely improved to the maximum. The uniform distribution of isometric crystal contributes to the best elongation at the annealing temperature of 400 °C.

• Periodical: Applied Mechanics and Materials (Volumes 303-306)
• Pages: 2524-2527
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.303-306.2524
• Online since: February 2013
• Authors: Lei Wang, Guang Hui Min, Pan Pan Gao, Xin Ying Wang, Hua Shun Yu, Hong Wei Cui
• Keywords: Annealing Treatment, Magnesium Alloy Sheets, Mechanical Property, Microstructure

References

[1] M.M. Avedesian, in: H. Baker (Eds. ), ASM Specialty Handbook Magnesium and Magnesium Alloys, ASM International, Materials Park, OH, (1999).

[2] A. J¨ager,P. Luk´aˇc, Mater. Sci. Eng. A 432 (2006) 20–25.

[3] Qiu et al, Transactions of Nonferrous Metals Society of China, 20, s481 (2010).

[4] A. YAMASHITA, Z. HORITA, T.G. LANGDON, Mater. Sci. Eng. A300(2001)142−147.

[5] X.M. FENG, T.T. AI, Trans Nonferrous Met Soc China, 2009, 19(2): 293−298.

[6] H.K. LIN, J.C. HUANG: Mater Trans, 2002, 43(10): 2424−2432.

[7] H WATANABE, T MUKAI, M KUHZU, S TANABE, K HIGASHI, Mater. Trans, 40 (8) (1999): 809–814.

[8] M.T. PEREZ-PRADO, J.A. DEL VALLE, J.M. CONTRERAS, O.A. RUANO, Scr Mater, 2004, 50(5): 661−665.

[9] M.T. PEREZ-PRADO, J.A. DEL VALLE, O.A. RUANO, Mater Lett, 2005, 59(26): 3299−3303.

[10] J.A. DEL VALLE, M.T. PEREZ-PRADO, O.A. RUANO, Mater Sci Eng A, 2005, 410/411: 353−357.

[11] M.Y. ZHAN, Y.Y. LI, W.P. CHEN, Trans Nonferrous Met Soc China, 2008, 18(2): 309−314.

[12] W. QIU, E.H. HAN, L. LIU, Trans. Nonferrous Met. Soc. China 20(2010) s481−s487.

[13] Chen et al., Materials Science and Engineering: A, 527, 1236 (2010).

[14] S.R. Agnew, O. Duyglu, Int. J. Plast. 21 (2005) 1161–1193.

[15] A. Staroselsky, L. Anand, Int. J. Plast. 19 (2003) 1843–1864.

[16] L. Jiang, J.J. Jonas, A.A. Luo, et al., Scripta Mater. 54 (2006) 771–775.

[17] Y.N. Wang, J.C. Huang, Acta Mater. 55 (2007) 897–905.