Browse Publications Technical Papers 2010-01-0410
2010-04-12

Mechanical and Thermophysical Properties of Magnesium Alloy Extrusions 2010-01-0410

Magnesium alloy extrusions offer potentially more mass saving compared to magnesium castings. One of the tasks in the United States Automotive Materials Partnership (USAMP) ?Magnesium Front End Research and Development? (MFERD) project is to evaluate magnesium extrusion alloys AM30, AZ31 and AZ61 for automotive body applications. Solid and hollow sections were made by lowcost direct extrusion process. Mechanical properties in tension and compression were tested in extrusion, transverse and 45 degree directions. The tensile properties of the extrusion alloys in the extrusion direction are generally higher than those of conventional die cast alloys. However, significant tension-compression asymmetry and plastic anisotropy need to be understood and captured in the component design. The thermophysical properties, thermal diffusivity, density, specific heat and thermal conductivity, of AM30 and AZ61 alloys were measured from room temperature (RT) to 425°C for numerical simulation of the extrusion processes.

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