In situ observation of high temperature creep behavior during annealing of steel
In situ observation of high temperature creep behavior during annealing of steel
复制标题
钢退火过程中高温蠕变行为的原位观察
DOI：
10.1007/s11661-012-1348-5
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Y. Murakami,K. Yasuda
中科院分区：
文献类型：
--
作者：
X.F. Zhang;H. Terasaki;Y. Komizo;Y. Murakami,K. Yasuda
以往的蠕变研究表明，多晶晶粒尺寸，亚结构和蠕变速率之间的密切关系。然而，目前，我们对多晶晶粒尺寸、亚结构和热应力对蠕变变形行为的影响的认识似乎还很不足，特别是在蠕变过程中普遍缺乏结构变化的原位数据。本文利用高温激光扫描共聚焦显微镜对C-Mn-Al钢在退火过程中的滑移变形进行了原位观察，系统地研究了热应力、奥氏体晶粒尺寸和冷却速度对滑移变形的影响。最后，基于热膨胀各向异性和温度差的动力学模型被开发来解释这些有趣的实验结果。对退火过程中滑移变形的原位研究有助于对高温蠕变行为的理解。
Previous studies on creep suggested a close relationship between polycrystal grain size, substructure, and creep rate. At present, however, our understanding of the influence of polycrystal grain size, substructure, and thermal stress on creep deformation behavior seems rather insufficient, especially as there is a general lack ofin situdata on structural changes during creep. In this study, the effects of thermal stress, austenite grain size, and cooling rate on slip deformations in C–Mn–Al steel during annealing were investigated systematically on the basis ofin situobservations using high temperature laser scanning confocal microscopy. Finally, a kinetics model based on thermal expansion anisotropy and temperature difference was developed to explain these interesting experimental results. Thein situinvestigation of slip deformation during annealing greatly contributes to the understanding of high temperature creep behavior.