Nakamichi H, Humphreys F J, Brough I
Materials Science Centre, School of Materials, The University of Manchester, Grosvenor Street, Manchester M1 7HS, United Kingdom.
J Microsc. 2008 Jun;230(Pt 3):464-71. doi: 10.1111/j.1365-2818.2008.02006.x.
In situ electron backscatter diffraction microstructural analysis of recrystallizing interstitial free steels deformed to strains of 0.75 and 1.6 has been carried out in a FEG-SEM. The experimental procedures are discussed, and it is shown that there is no degradation of the electron backscatter diffraction patterns at temperatures up to 800 degrees C. Analysis of the surface and interior microstructures of annealed samples shows only minor difference, which suggests that in situ annealing experiments are of value. In addition, it is shown that in situ measurements allow a detailed comparison between the same areas before and after annealing, thereby providing information about the recrystallization mechanisms. Sequential recrystallization phenomena, such as initiation and growth of new grains, are observed at temperatures over 740 degrees C, and depending on the deformation histories, different recrystallization behaviour is observed. It is found that {111} <123> recrystallized grains are preferentially formed in the highly deformed material, whereas no strong recrystallization texture is formed in the lower strained material.
在场发射枪扫描电子显微镜（FEG-SEM）中，对形变量为0.75和1.6的再结晶无间隙原子钢进行了原位电子背散射衍射微观结构分析。讨论了实验步骤，结果表明在高达800摄氏度的温度下，电子背散射衍射图案没有退化。对退火样品的表面和内部微观结构分析显示差异很小，这表明原位退火实验具有价值。此外，结果表明原位测量允许对退火前后的相同区域进行详细比较，从而提供有关再结晶机制的信息。在超过740摄氏度的温度下观察到连续再结晶现象，如新晶粒的形核和长大，并且根据变形历史，观察到不同的再结晶行为。研究发现，在高度变形的材料中优先形成{111}<123>再结晶晶粒，而在形变量较小的材料中没有形成强烈的再结晶织构。
