Microstructure of AZ91D in Different Treatment Conditions


Article Preview

The microstructures of magnesium alloy AZ91D in as-cast, solid solution and aging conditions were studied by optical, scanning electron and transmission electronic microscopes. The relationship between microstructure and the microhardness was analyzed. It has been found that the microhardness in the matrix varied slightly with the increasing solution time, but increased quickly with the aging time. The difference of the microhardness between the matrix and the second phase in as-cast condition is larger than that in T6 aging condition, because the aluminum-zinc-magnesium (poor) phase existed in the as-cast condition.



Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.




J. Zhang et al., "Microstructure of AZ91D in Different Treatment Conditions", Materials Science Forum, Vols. 546-549, pp. 143-146, 2007

Online since:

May 2007




[1] H. Hoche, H. Scheerer, D. Probst, E. Broszeit, C. Berger: Surface and Coatings Technology, Vol. 174-175 (2003), p.1018.

[2] D. Williamm, Jr. Callister: Materials Science and Engineering (John Wiley and Sons, USA 2003).

[3] C.R. Brooks: Heat Treatment, Structure and Properties of Nonferrous Alloys (ASM Int., USA 1990).

[4] O.A. Lambri, W. Riehemann, Z . Trojanova: Scripta Materiallia Vol. 45(2001), p.1365.

[5] E. Schaberger, T. Schneidewind, et al: Praktische Metallographie Vol. 37 (2000), p.140.

[6] E. Schaberger, D. Kahn, M. Lang: Raktische Metallographie Vol. 35(1998), p.306.

[7] J. Bohlen, D. Letzig, et al: Magnesium Technology Vol. 17-21(2002), p.165.

[8] C.H. Caceres, C.J. Davidson, et al: Materials Science and Engineering Vol. A 325 (2002), p.344.

[9] Tao Yanling: Master Thesis, Chongqing University, 2004 (in Chinese).

[10] S. Celotto: Acta Mater Vol. 48(2000), p.1775.

[11] Xiao Xiaoling, Luo Chengping, et al: Acta Metallurgica Sinica Vol. 37(2001) p.1 (in Chinese).

[12] Daniel Henkek, Alan W. Pense: Structure and Properties of Engineering Materials, Fifth edition (McGraw-Hill, USA 2002).