利用背散射电子衍射花样(EBSD),分析了冷轧变形量、退火温度和保温时间对高纯铝晶界特征分布的影响,并探讨了纯铝的变形再结晶行为与低∑重位点阵晶界(Coincidence Site Lattice,简称CSL)大量形成之间的内在联系。结果表明,变形量20%的...利用背散射电子衍射花样(EBSD),分析了冷轧变形量、退火温度和保温时间对高纯铝晶界特征分布的影响,并探讨了纯铝的变形再结晶行为与低∑重位点阵晶界(Coincidence Site Lattice,简称CSL)大量形成之间的内在联系。结果表明,变形量20%的试样在360℃退火时低∑-CSL晶界比例达到了44.2%,与低层错能金属相比,铝的∑3n晶界比例较低,其他低∑-CSL晶界比例较高。不同变形量试样的∑3n晶界比例在再结晶温度退火取得最大值,升高退火温度或延长保温时间,晶粒都将发生长大,一般大角度晶界的迁移会吞并已有的低∑-CSL晶界,造成∑3n晶界和低∑-CSL晶界比例都有所下降。展开更多
The mechanism responsible for the formation of recrystallization texture in cold-rolled Ti bearing interstitial free （IF） steel sheets was investigated using electron back-scatter diffraction （EBSD）. In addition, ...The mechanism responsible for the formation of recrystallization texture in cold-rolled Ti bearing interstitial free （IF） steel sheets was investigated using electron back-scatter diffraction （EBSD）. In addition, the origin of nuclei with specific orientations was studied. The formation of recrystallization texture was explained by oriented nucleation. Most nuclei have a high misorientation angle of 25-55° with the surrounding deformed matrices, but no specific orientation of misorientation axis between the nucleus and the surrounding deformed matrix is observed. The stored energy of deformed grains is in the decreasing order of the {111}〈112〉,{111}〈110〉, {112}〈110〉 and {001}〈110〉 orientations. New {111}〈110〉 grains are nucleated within deformed {111}〈112〉 grains and new {111}〈112〉 grains originate in the deformed {111}〈110〉 grains.展开更多
文摘利用背散射电子衍射花样(EBSD),分析了冷轧变形量、退火温度和保温时间对高纯铝晶界特征分布的影响,并探讨了纯铝的变形再结晶行为与低∑重位点阵晶界(Coincidence Site Lattice,简称CSL)大量形成之间的内在联系。结果表明,变形量20%的试样在360℃退火时低∑-CSL晶界比例达到了44.2%,与低层错能金属相比,铝的∑3n晶界比例较低,其他低∑-CSL晶界比例较高。不同变形量试样的∑3n晶界比例在再结晶温度退火取得最大值,升高退火温度或延长保温时间,晶粒都将发生长大,一般大角度晶界的迁移会吞并已有的低∑-CSL晶界,造成∑3n晶界和低∑-CSL晶界比例都有所下降。
基金This work was supported by the National Natural Science Foundation of China under grant No. 50171040.
文摘The mechanism responsible for the formation of recrystallization texture in cold-rolled Ti bearing interstitial free （IF） steel sheets was investigated using electron back-scatter diffraction （EBSD）. In addition, the origin of nuclei with specific orientations was studied. The formation of recrystallization texture was explained by oriented nucleation. Most nuclei have a high misorientation angle of 25-55° with the surrounding deformed matrices, but no specific orientation of misorientation axis between the nucleus and the surrounding deformed matrix is observed. The stored energy of deformed grains is in the decreasing order of the {111}〈112〉,{111}〈110〉, {112}〈110〉 and {001}〈110〉 orientations. New {111}〈110〉 grains are nucleated within deformed {111}〈112〉 grains and new {111}〈112〉 grains originate in the deformed {111}〈110〉 grains.
