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Microstructure and texture evolution during the uniaxial tensile testing of AM30 magnesium alloy

par Jiang, L.;Jonas, J.J.;Luo, Alan;Sachdev, Anil;Godet, Stéphane
Référence Symposium held during the TMS Annual Meeting(12.03.2006-16.03.2006: San Antonio, TX, United States), Magnesium Technology 2006, page (233-238)
Publication Publié, 2006

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Résumé :

The evolution of microstructure and texture was examd. in an AM30 alloy during uniaxial tensile testing at temps. from ambient to 350°C and at strain rates from 0.001 to 0.1/s. Samples were cut from extruded AM30 tubes along the extrusion direction. DRX was obsd. even at temps. as low as 150°C. However, it did not go to completion under any set of exptl. conditions. The microstructures near the fracture surfaces indicate that cracks are readily formed next to twins at high strain rates; such twinning-induced cracking is evident at temps. up to 200°C. Partial recrystn. also exacerbates the tendency for cavitation. No significant change in the texture occurred during straining along the extrusion direction at elevated temps. This suggests that the end-texture for extension was already set up during extrusion, which is responsible for the low ductility of the present material.