Tingzhuang Han

Microstructure and formability evolutions of AZ31 magnesium alloy sheets undergoing continuous bending process

Abstract Continuous bending (CB) process along rolling direction was performed to improve the formability of AZ31 magnesium alloy sheets. The microstructure and texture evolutions were characterized by optical microscopy (OM) and electronic backscatter diffraction (EBSD). The results reveal that the basal texture intensity of continuously bent and annealed (CBA) sample is drastically weakened. A large number of twins are induced on the concave surface by the 1st pass bending and the density of twins obviously declines during the 2nd pass bending owing to the occurrence of detwinning. Due to the asymmetric tension–compression strain states between the outer and inner regions during V-bending, twinning and detwinning are generated alternatively during the CB process. The Erichsen value is 5.2 mm which increases by 41% compared with that of as-received sample. This obvious improvement of formability can be attributed to the weakened basal texture, which leads to a smaller plastic strain ratio (r-value) together with a larger strain-hardening exponent (n-value).

Influence of Grain Orientation on the Corrosion Behavior of Rolled AZ31 Magnesium Alloy

The effect of the grain orientation on corrosion behavior of rolled AZ31 magnesium alloy is investigated in this study. The test samples have a similar surface roughness to the Mg alloy in practical application. The immersion test and electrochemical impedance spectroscopy show that the TD–ND planes dominated by

Effects of grain size on shift of neutral layer of AZ31 magnesium alloy under warm condition

(10\bar{1}0)

Improving low-cycle fatigue properties of rolled AZ31 magnesium alloy by pre-compression deformation

(101¯0),

Enhanced mechanical properties of AZ31 magnesium alloy sheets by continuous bending process after V-bending

(11\bar{2}0)

Grain refining and mechanical properties of AZ31 alloy processed by accumulated extrusion bonding

(112¯0) and