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首页> 外文会议>XV international conference on electron microscopy >Recrystallization behaviour of plane strain deformed Al-Mn-Mg-Sc-Zr alloy
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Recrystallization behaviour of plane strain deformed Al-Mn-Mg-Sc-Zr alloy

机译：平面应变变形Al-Mn-Mg-Sc-Zr合金的再结晶行为

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摘要

Early stages of recrystallization were observed for the Al-Mn-Mg-Zr(Sc) aluminium alloy containing a fine second phase particles. The samples were plane strain compressed to 40%, 60% and 83% and then annealed. The processes of the recovery and the nucleation of new grains were analysed with the use of scanning electron microscopy equipped with a high resolution electron backscattered diffraction facility. The deformed alloy contained a structure of flat grains situated parallel to the compression plane. After annealing, the structure coarsened. However, the growth of the new grains was strongly hindered by the presence of particles, and the elongated shape of the deformed grains was conserved up to the later stages of recrystallization. In the case of the samples deformed up to 40%, the structure was transformed by the mechanism of continuous recrystallization, whereas, in the case of the samples deformed up to 60% or 83%, both mechanisms - of continuous and discontinuous recrystallization - were valid. A particular role in the rise of the nuclei and the structure spheroidization is attributed to the thermally activated migration of the low-angle grain boundaries and the movement of the dislocations stored inside the cells. This leads to an increase of the misorientation angles across the pre-existing low-angle boundaries.
机译：对于包含细第二相颗粒的Al-Mn-Mg-Zr（Sc）铝合金，观察到了重结晶的早期阶段。样品经平面应变压缩至40％，60％和83％，然后退火。使用配备了高分辨率电子背散射衍射设备的扫描电子显微镜，分析了新晶粒的恢复和成核过程。变形的合金包含平行于压缩平面的扁平晶粒结构。退火后，组织粗化。但是，由于颗粒的存在，严重阻碍了新晶粒的生长，并且变形的晶粒的细长形状一直保留到再结晶的后期。在样品变形高达40％的情况下，结构通过连续重结晶的机制进行了转变，而在样品变形高达60％或83％的情况下，连续和不连续重结晶的两种机制都被确定了。有效。在核的上升和结构球化中的特殊作用归因于低角度晶界的热活化迁移和储存在细胞内的位错的运动。这导致横跨预先存在的低角度边界的取向差角的增加。

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