Microstructural evolution during the annealing of an extruded AZ31 magnesium alloy
Microstructural evolution during the annealing of an extruded AZ31 magnesium alloy
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DOI：
10.1016/j.jallcom.2010.07.008
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发表时间：
2010-09-10
影响因子：
6.2
通讯作者：
Letzig, Dietmar
中科院分区：
文献类型：
--
作者：
Yi, Sangbong;Brokmeier, Heinz-Guenter;Letzig, Dietmar
采用中子衍射和电子背散射衍射（EBSD）技术研究了AZ 31挤压棒在400 ℃退火过程中的显微组织演变。在挤压棒中，小于5 μ M的等轴晶粒和具有显著程度的内部取向差的大细长晶粒主要< 1 0 0 >平行于挤压方向取向。在400 ℃的180 s退火期内，以内部取向梯度为驱动力，以小晶粒为代价发生快速晶粒生长。短时间退火后，大晶粒内部形成等轴小晶粒，< 1 1 0 >平行于挤压方向的晶粒优先生长。结果，< 1 1 0 >在400 ℃下退火1800 s后，发生主织构组分向组分的转变。(C)2010 Elsevier B.V.保留所有权利。
Microstructural evolution during the annealing of AZ31 extruded rod at 400 degrees C has been examined by employing neutron diffraction and electron backscatter diffraction (EBSD). In the as-extruded bar, equiaxed grains smaller than 5 mu M and large elongated grains having significant degrees of internal misorientation are oriented mainly with < 1 0 0 > parallel to the extrusion direction. Rapid grain growth occurs within the 180s annealing period at 400 degrees C at the expense of the small grains with the internal orientation gradient as driving force. After short time annealing, small equiaxed grains are formed inside the large elongated grains, and grains having < 1 1 0 > parallel to the extrusion direction show preferred growth. As a result, a transition of the main texture component to the < 1 1 0 > component occurs after annealing for 1800 s at 400 degrees C. (C) 2010 Elsevier B.V. All rights reserved.