Microstructure Evolution in Magnesium Alloy ZK60 during Cyclic Extrusion and Compression

Abstract:

The microstructural evolution of of as-cast ZK60 magnesium alloy processed by cyclic extrusion and compression (CEC) were studied, and the effects of technical parameters on microstructural evolution were investigated. The results show that the grains of as-cast ZK60 magnesium alloy were obviously refined and uniformed by CEC, the average grain size was decreased from original 50 ~ 60 μm to about 2 μm when the extrusion ratio was 8 with 8-passes at 350°C, and the refinement effect was increased with the rising of extrusion ratio and passes. The effect of increasing passes on grain refinement was not obvious when it exceeds 8. Nevertheless, it is beneficial for the grain homogenization.

• Periodical: Advanced Materials Research (Volume 1035)
• Pages: 259-262
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1035.259
• Online since: October 2014
• Authors: Fei Han, Hong Wei Liu*, Gang Chen
• Keywords: Compression, Cyclic Extrusion, Microstructure, ZK60 Magnesium Alloy

References

[1] J. Lin, Q. Wang, Microstructure and high tensile ductility of ZK60 magnesium alloy processed by cyclic extrusion and compression, J. Alloys Compd. 476 (2009) 441-445.

DOI: 10.1016/j.jallcom.2008.09.031

[2] Y. Chen, Effect of the second phase on the microstructure of magnesium alloys during cyclic extrusion compression, Mater. Sci. Forum 584 (2008) 523-527.

DOI: 10.4028/www.scientific.net/msf.584-586.523

[3] Q. Wang, J. Lin, Influence of cyclic extrusion and compression on the mechanical property of mg alloy ZK60, Acta Metallurgica Sinica 44 (2008) 55-58.

[4] A. Galiyev, R. Kaibyshev, G.J. Gottstein, Correlation of plastic deformation and dynamic recrystallization in magnesium alloy ZK60, Acta Mater. 49 (2001) 11-39.

DOI: 10.1016/s1359-6454(01)00020-9

[5] M. Riehert, H.P. Stüwe, M.J. Zehetbauer, Work hardening and microstructure of AlMg5 after severe plastic deformation by cyclic extrusion and compression, Maten Sci. Eng, A 355 (2004) 180-185.

DOI: 10.1016/s0921-5093(03)00046-7

[6] N. Pardis, B. Talebanpour, Cyclic expansion-extrusion: A modified counterpart of cyclic extrusion-compression, Maten Sci. Eng, A 528 (2011) 7537-7540.

DOI: 10.1016/j.msea.2011.06.059

[7] M. Riehert, H.P. Stüwe, Characteristic features of microstructure of AlMg5 deformed to large plastic strains, Maten Sci. Eng, A 301 (2001) 237-243.

DOI: 10.1016/s0921-5093(00)01803-7

[8] Y.J. Chen, Q.D. Wang, Microstructure evolution in magnesium alloy AZ31 during cyclic extrusion compression, J. Alloys Compd. 462 (2008) 192-200.

DOI: 10.1016/j.jallcom.2007.07.116

[9] X. Zhang, G. Yuan, Mechanical properties and biocorrosion resistance of Mg-Nd-Zn-Zr alloy improved by cyclic extrusion and compression, Mater. Letters 74 (2012) 128-131.

DOI: 10.1016/j.matlet.2012.01.086

[10] M. Richert, H.P. Stuwe, Work hardening and microstructure of AlMg5 after severe plastic deformation by cyclic extrusion and compression, Maten Sci. Eng, A 355 (2003) 180-185.

DOI: 10.1016/s0921-5093(03)00046-7