The effect of sample orientation on static recrystallization (SRX) of AZ31 magnesium alloy was investigated with electron backscattered diffraction (EBSD) technique. Two kinds of samples, one was cut along the normal direction of the sheet (0? sample), the other along the transverse direction of the sheet (90? sample), were given 15% uniaxial compression strain at 150℃, followed by annealing at 275℃ for different times. The results show that slip dominates the deformation process during 15% uniaxial compression strain for the 0? samples. However, extension twinning firstly dominates the deformation process and then slip dominates the deformation process during 15% uniaxial compression strain for the 90? samples. Due to the different deformation mechanisms, the deformation stored energy of the 90? samples is lower than that of the 0? samples. As a result, the initiation and completion of SRX of the 90? samples are significantly retarded compared with that of the 0? samples. As SRX proceeds, the percentage of low angle grain boundaries between 2? and 4? decreases dramatically and a peak located around 30? appears in misorientation angle distribution map for both the 90? samples and the 0? samples. Most SRX grains nucleate at the original grain boundaries for both the samples. A few SRX grains nucleate within extension twins.
HUANG Hong-Shou
,
LIU Wei
,
TANG Rui-He
,
LIU Qiang
. EFFECT OF SAMPLE ORIENTATION ON STATIC RECRYSTALLIZATION OF AZ31 MAGNESIUM ALLOY[J]. Acta Metall Sin, 2012
, 48(8)
: 915
-921
.
DOI: 10.3724/SP.J.1037.2012.00159
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