Skip to main content Accessibility help

Mechanical properties of AZ31 Mg alloy recycled by severe deformation

  • Yasumasa Chino (a1), Tetsuji Hoshika (a1), Jae-Seol Lee (a1) and Mamoru Mabuchi (a2)


AZ31 Mg machined chips were recycled by extrusion at 673 K with a low extrusion ratio of 45:1 and a high extrusion ratio of 1600:1. Oxide contaminants were dispersed more uniformly in the recycled specimen with the high extrusion ratio than in that with the low extrusion ratio. In tensile tests, the recycled specimens with the high extrusion ratio showed about 50% higher 0.2% yield stress and about 20% higher tensile strength compared with those of the reference specimens, which were the extruded AZ31 Mg blocks under the same conditions as the recycled specimens. The improvement of the tensile properties was attributed not only to the small grain size, but also to the dispersed oxide contaminants.


Corresponding author

a)Address all correspondence to these authors. e-mail:
b)Address all correspondence to these authors. e-mail:


Hide All
1.Ebert, T., Mordike, B.L.: Magnesium properties—applications—potential. Mater. Sci. Eng. A302, 37 (2001).
2.King, J.F., Hopkins, A., Thistlethwaite, S. Recycling of by-products from magnesium diecasting, in Proc. Third International Magnesium Conference, edited by Lorimer, G.W. (The University Press Cambridge, Cambridge, England, 1997), p. 51.
3.Mabuchi, M., Kubota, K., Higashi, K.: New recycling process by extrusion for machined chips of AZ91 magnesium and mechanical properties of extruded bar. Mater. Trans. JIM 36, 1249 (1995).
4.Watanabe, H., Moriwaki, K., Mukai, T., Ishikawa, K., Kohzu, M., Higashi, K.: Consolidation of machined magnesium alloy chips by hot extrusion utilizing superplastic flow. J. Mater. Sci. 36, 5007 (2001).
5.Kondoh, K., Luangvaranunt, T., Aizawa, T.: Solid-state recycling of AZ91D magnesium alloy chips. J. Jpn. Inst. Light Metals 51, 516 (2001).
6.Chino, Y., Kishihara, K., Shimojima, K., Hosokawa, H., Yamada, Y., Wen, C.E., Iwasaki, H., Mabuchi, M.: Superplasticity and cavitation of recycled AZ31 magnesium alloy fabricated by solid recycling process. Mater. Trans. 43, 2437 (2002).
7.Chino, Y., Kobata, M., Shimojima, K., Hosokawa, H., Yamada, Y., Iwasaki, H., Mabuchi, M.: Blow forming of Mg alloy recycled by solid-state recycling. Mater. Trans. 45, 361 (2004).
8.Aida, T., Takatsuji, N., Matsuki, K., Kamado, S., Kojima, Y.: Homogeneous consolidation process by ECAP for AZ31 cutting chips. J. Jpn. Inst. Light Metals 54, 532 (2004).
9.Alves, H., Koster, U., Aghion, E., Eliezer, D.: Environmental behavior of magnesium and magnesium alloys. Mater. Technol. 16, 110 (2001).
10.Chino, Y., Iwasaki, H., Mabuchi, M.: Solid state recycling for machined chips of iron by hot extrusion and annealing. J. Mater. Res. 19, 1524 (2004).
11.Yin, D.L., Zhang, K.F., Wang, G.F., Han, W.B.: Warm deformation behavior of hot-rolled AZ31 Mg alloy. Mater. Sci. Eng. A392, 320 (2005).
12.Armstrong, R., Codd, I., Douthwaite, R.M., Petch, N.J.: The plastic deformation of polycrystalline aggregates. Philos. Mag. 7, 45 (1962).
13.Wang, Z.C., Prangnell, P.B.: Microstructure refinement and mechanical properties of severely deformed Al–Mg–Li alloys. Mater. Sci. Eng. A328, 87 (2002).
14.Humphreys, F.J.: A unified theory of recovery, recrystallization and grain growth based on the stability and growth of cellular microstructures—II. The effect of second-phase particles. Acta Mater. 45, 5031 (1997).
15.Mabuchi, M., Higashi, K.: Strengthening mechanisms of Mg–Si alloys. Acta Mater. 44, 4611 (1996).
16.Aikin, R.M. Jr.Christodoulou, L.: The role of equiaxed particles on the yield stress of composites. Scripta Metall. 25, 9 (1991).
17.Luster, J.W., Thumann, M., Baumann, R.: Mechanical properties of aluminum alloy 6061–Al2O3 composites. Mater. Sci. Technol. 9, 853 (1993).
18.Barnett, M.R.: A Taylor model based on description of the proof stress of magnesium AZ31 during hot working. Metall. Mater. Trans. A 34, 1799 (2003).
19.Magnesium and Magnesium Alloys, ASM Specialty Handbook, edited by Avedesian, M.M. and Baker, H. (ASM International, The Materials Information Society, Materials Park, OH, 1999), p. 258.
20.Frost, H.J., Ashby, M.F.: Deformation-Mechanism Maps (Pergamon Press, Oxford, UK, 1982), p. 44.
21.Ceramics Dictionary, edited by The Ceramics Society of Japan (Maruzen, Tokyo, Japan, 1997), p. 556 (in Japanese).


Mechanical properties of AZ31 Mg alloy recycled by severe deformation

  • Yasumasa Chino (a1), Tetsuji Hoshika (a1), Jae-Seol Lee (a1) and Mamoru Mabuchi (a2)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed