Microstructures magnesium alloys

Y. Xue et al Microstructure-based multistage fatigue modeling of a cast AE44 magnesium alloy. Int. J. Fatigue 29, 666-676 (2007)... 

G. Baril, C. Blanc, and N. P bfere, "AC Impedance Spectroscopy in Characterizing Time-Dependent Corrosion of AZ91 and AM50 Magnesium Alloys Characterization with Respect to Their Microstructures," Journal of The Electrochemical Society, 148 (2001) B489-B496. 

Sequira, W. R, Dunlop, G. D., Murray, M. T. (1996), Effect of section thickness and microstructure on the mechanical properties of high pressure die cast magnesium alloy AZ91D, in Proc. Third Interna-tional Magnesium Conference, Lorimer, G. W. (Ed.) The Institute of Materials, p. 63. The University Press. Cambridge, UK. 

Song G.-L, Atrens A., StJohn D., Zheng L. (2000), Corrosion behaviour of the microstructural constituents of AZ alloys , in K.U. Kainer (ed). Magnesium Alloys and their Applications, Wiley-VCH, pp 426-431. 

Blawert C, Morales GED, Dietzel W, Kainer KU, Scharf C, Ditze A, (2006), Influence of the copper content on microstructure and corrosion resistance of AZ91 based secondary magnesium alloys , SAE paper 2006-01-0254. 

Coy AE, Viejo F, Garcia GET, Liu Z, Skeldon P, Thompson GE, (2010), Effect of excimer laser surface melting on the microstructure and corrosion performance of the die cast AZ91D magnesium alloy . Corrosion Science, 52, 387-397. 

Volovitch P, Masse JE, Fabre A, Barrallier L, Saikaly W, (2008), Microstructure and corrosion resistance of magnesium alloy ZE41 with laser surface cladding by Al-Si powder . Surface and Coatings Technology, 202, 4901 914. 

The atmospheric corrosion of metals is largely dependent on the electrochemical reactions occurring in the thin aqueous layer on the surface and at the interface between the solid substrate and the thin electrolyte layer. The thin aqueous layer on the surface also acts as a conductive medium which can support electrochemical processes on the surface. Due to the presence of different phases with different electrochemical properties in magnesium alloys the anodic and cathodic reactions are often localised in different areas on the magnesium surface. The microelectrodes may consist of different phases present in the microstructure of the alloys. The influence of the microstructure on the atmospheric corrosion behaviour of magnesium alloys will be discussed in more detail further on. In atmospheric corrosion the thin electrolyte reduces... 

L. -Y. Wei, Development of microstructure in cast magnesium alloys, Chalmers University of Technology, Gbteborg, Sweden, in, p. 217 (1990). 

LM Peng, JW Chang, XW Guo, A Atrens, WJ Ding, YH Peng, Influence of heat treatment and microstructure on the corrosion of magnesium alloy Mg-10Gd-3Y-0.4Zr, Journal of Applied Electrochemistry, 2009, 39, 913. 

WC Neil, M Forsyth, PC Howlett, CR Hutchinson, BRW Hinton, Corrosion of magnesium alloy ZE41 - the role of microstructural features. Corrosion Science, 2009, 51, 387-394. 

R Zeng, E Han, W Ke, W Dietzel, KU Kainer, A Atrens, Influence of microstructure on tensile properties and fatigue crack growth in extruded magnesium alloy AM60, International Journal of Fatigue, 2010, 32, 411 19. 

G Song, Z Xu, The surface, microstructure and corrosion of magnesium alloy AZ31 sheet, Electrochimica Acta, 2010, 55, 4148. 

R. Ambat, N.N. Aung and W. Zhou, Evaluation of microstructural effects on corrosion behaviour of AZ91D magnesium alloy . Corrosion Science, 42, (2000), 1433-1455. 

Since the corrosion performance of a metal is determined primarily by its chemical composition and microstructure, an understanding of the metallurgical effects on corrosion is critically essential. Part II considers the role of typical microstructures and alloying elements of Mg alloys in corrosion. Metallic glass Mg alloys and some other innovative magnesium alloys are also discussed for their interesting atypical compositions or microstructures. This part provides an extension and development of the fundamentals presented in Part I. 

Bobby Kannan, M. (2010), Influence of microstructure on the in-vitro degradation behaviour of magnesium alloy ,A/aier7 a/5 Lexers, 64, 739 2. 

Aluminium and magnesium melt at just over 900 K. Room temperature is 0.3 T and 100°C is 0.4 T, . Substantial diffusion can take place in these alloys if they are used for long periods at temperatures approaching 80-100°C. Several processes can occur to reduce the yield strength loss of solutes from supersaturated solid solution, overageing of precipitates and recrystallisation of cold-worked microstructures. 

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