Texture and Mechanical Properties of AZ31 Magnesium Alloy Sheets Processed by Symmetric/Asymmetric Combination Hot-Rolling

J. Horiuchi; Hirofumi Inoue; Takayuki Takasugi

doi:10.4028/www.scientific.net/MSF.654-656.719

Paper Titles

Microstructure and Mechanical Properties of Extruded Mg-Zn-Ca Alloy
p.703

Twinning-Induced Negative Strain Rate Sensitivity in Wrought Magnesium Alloy AZ31
p.707

Grain Refinement of Magnesium Alloy AZ31 under Torsion Extrusion with a Square-Hole Die
p.711

Twinning Behavior in AZ31-B Polycrystal Texture Subjected to In-Situ Bending Test
p.715

Texture and Mechanical Properties of AZ31 Magnesium Alloy Sheets Processed by Symmetric/Asymmetric Combination Hot-Rolling
p.719

Crystallographic Orientation Dependence of Fatigue Crack Propagation Behavior in Rolled AZ31 Magnesium Alloy
p.723

Microstructure Evolution in AZ31 Magnesium Alloy Worked by Torsion at Warm Temperature
p.727

Deep Drawing of AM31 Magnesium Alloys
p.731

Grain Refinement by Combined ECAE/Extrusion and Dieless Drawing Processes for AZ31 Magnesium Alloy Tubes
p.735

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Texture and Mechanical Properties of AZ31 Magnesium Alloy Sheets Processed by Symmetric/Asymmetric Combination Hot-Rolling

Abstract:

Conventional symmetric rolling enhances yield strength by forming basal texture, while asymmetric rolling can improve formability by inclining the c-axis of hcp crystal. In this study, the combination rolling consisting of symmetric and asymmetric hot rolling has been performed to simultaneously improve formability and maintain high strength of AZ31 magnesium alloy sheet. The symmetrically/asymmetrically combination hot-rolled and annealed sheet exhibits a broadened texture having double peaks with tilt angles of 0º and 40º from ND toward RD with respect to the c-axis. Correspondingly, this sheet shows relatively high yield strength of 123 MPa and large elongation of 24.7%. As for cup drawing test, the conventional warm-rolled sheet is barely formed at 175 °C, but the symmetrically/asymmetrically combination rolled sheet can be formed at temperature as low as 75 °C. These results indicate that the symmetric/asymmetric combination hot-rolling leads to a unique texture with good balance of formability and strength.