Structural Evolution and Deformation Behavior of Extruded AZ91 with Ca Addition in the Semi-Solid State

Abstract:

The microstructural evolution and mechanical response in compression in the semi-solid state of previously extruded AZ91 alloys containing two levels of Ca additions (1mass%Ca (AZC911) and 2mass%Ca (AZC912)) have been studied. Ca additions have a significant effect on microstructural evolution and compression behavior of the AZ91 alloy. At 515°C, the liquid fraction in AZC911 is larger than that in AZC912, so that the compression stress of the AZC912 alloy was found to be much larger than that of the AZC911 alloy. This behavior is explained through DSC analysis which suggests that some solid Al2Ca phase remains in AZC912 alloy at this temperature. Increasing the remelting temperature for this alloy leads to more liquid and coarsening of the solid particles occurs with increasing holding time.

• Periodical: Solid State Phenomena (Volumes 116-117)
• Pages: 775-778
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.116-117.775
• Online since: October 2006
• Authors: S.M. Liang, Rongshi Chen, Jean Jacques Blandin, Michel Suéry, En-Hou Han
• Keywords: Ca Addition, Deformation Behavior, Magnesium Alloy, Microstructure, Semi-Solid State

References

[1] Q. D Wang, W.Z. Chen, and X. Q Zeng: J. Mater. Sci. Vol. 36 (2001), p.3035.

[2] A. A. Luo, M. P. Balogh and B. R. Powell: Metall. Mater. Trans. A, Vol. 33 (2002), p.567.

[3] Luo.A. A: Inter. Mater. Rev. Vol. 49 (2004), p.13.

[4] M Pekguleryuz and A.A. Kaya: Adv. Eng. Mat. Vol. 5 (2003), p.866.

[5] M Pekguleryuz and E. Baril: Mater. Trans. Vol. 42 (2001), p.1258.

[6] M. Sakamoto, S. Akiyama and K. Ogi: J. Mater. Sci. Letters Vol. 16 (1997), p.1048.

[7] F. Czerwinski and A. Zielinska-Lipiec: Acta Mater. Vol. 51 (2003), p.3319.

[8] M. B. Djurdjevic and R. Schmid-Fetzer: Mater. Sci. Eng. A. Vol. 417 (2006), p.24 a b c.