Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2014 - zeszyt 2

Numerical analysis of AZ31 alloy extrusion process by the ECAE method

nr katalogowy: 84274

In recent years one can observe huge increase of demand for magnesium alloys. More than 90% of products made of magnesium alloys are the constructional cast components. However, during the last decade, AZ series alloys are widely analysed in terms of their plastic forming. Due to their high strength properties and good castability, these alloys are used to manufacture some constructional components in aerospace, automotive and electronic industry. Moreover, these alloys have got excellent stiffness, exceptional dimensional stability, a high rate of vibration damping capacity and high recycling capacity [1÷4]. Comparing to casting alloys, wrought magnesium alloys are more promising, which is the reason of the growth of interest in magnesium processing technology and manufacturing the high quality products with a low specific gravity. The increase in the use of magnesium alloys in a variety of industrial applications is the cause of multiparameter analysis of their deformability to improve the mechanical properties. Plastic working of magnesium alloys at room temperature is difficult because of their compact hexagonal crystallographic structure at the ratio c/a close to the ideal value. Thus, the magnesium alloys at room temperature are deformed by slip on the base plane, what gives a limited number of deformation systems. Deformation of AZ31 alloy is usually carried out in the temperature range of 250÷300°C at low speeds [5÷8], where the operating deformation systems (slip on the base plane and on the prism one) allow to achieve the appropriate properties of the tested material. At works [9, 10] the results of investigations concerning the influence of deformation rate and temperat[...]

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2014-2

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