Diecast magnesium alloys

Song G.-L, Bowles A., StJohn D. (2004b), Iiffect of aging on yield stress and corrosion of diecast magnesium alloy . International Conference on Magnesium - Science, Technology and Applications, Beijing 2004, paper E31, pp 709-712. 

E. M. Gutman, Ya. Unigovski, A. Eliezer, E. Abramov, Corrosion creep of magnesium and diecast magnesium alloys, J. Mater. Set Letters, 20 (2001) 1541-1543. 

Song G.-L., Atrens A. (1998), Corrosion behaviour of skin layer and interior of diecast AZ91D , International Conference on Magnesium Alloys and their Applications, Wolfsburg, pp 415-419. 

Corrosion creep of magnesium (Mg) and diecast magnesium (Mg) alloys... 

Table 9.2 Tensile properties of pure Mg, diecast (DC) and extruded (E) magnesium alloys...

Time-dependent creep rate of pure magnesium (a) and diecast Mg alloys (b) AZ91D (1), AM50 (2) and AS21 (3) in 3.5% NaCI (a) and in 0.1 N Na2B407 + Mg(OH)2 (a, b) Abbreviation TB + MH means sodium tetraborate and magnesium hydroxide (buffer solution) [42]. 

The synergistic effect of corrosion and stress on the creep behavior of magnesium and diecast Mg alloys named corrosion creep has been investigated. We can conclude that at room temperature marked plasticization and fracture are observed in sodium tetraborate buffer solution even under stresses less than 40% of TYS as compared with common low-temperature creep in air almost... 

Ya. B. Unigovski, L. Riber, E. M. Gutman, Corrosion stress relaxation in pure magnesium and diecast Mg alloys, J. Metals, Materials Minerals, 17(1) (2007) 1-7. 

The special high-purity zinc (99-99%) is used mainly for the production of diecasting alloys containing 4% aluminium and 0 -04% magnesium and some-times I % copper, as shown in Table 4.30, which gives the composition of the two alloys laid down by BS 1004 1972, and of some newer zinc alloys. 

Cashion, S, P., Ricketts, N. J., Frost, M. T., and Kom, C., The Protection of Molten Magnesium and Its Alloys During Diecasting, International Magnesium Association Automotive Seminar, Aalen, Germany, 15 June 2000. 

This chapter provides an overview of the corrosion mechanisms of typical Mg alloys, most of which contain two or more phases. Magnesium (Mg) is a reactive metal and corrosion protection is an issue of importance [1] particularly for the automobile industry. The rapid increase in Mg use is due to its lightweight and good casting capabilities, particularly its ability to be diecast into large, thin sections. Typical examples are automobile seats, instrument panels, computer cases, etc. Reviews [1-4] and our early research [5-9] have indicated that the poor corrosion resistance of Mg alloys results from (a) the high intrinsic dissolution tendency of magnesium, which... 

Anodized Mg alloys reveal a significantly longer creep life than uncoated diecast alloys. Pure magnesium shows transgranular fracture in corrosion creep tests against the ordinary intergranular fracture of alloys in corrosive media. 

---