Grain boundary characteristics and texture formation in a medium carbon steel during its austenitic decomposition in a high magnetic field
Grain boundary characteristics and texture formation in a medium carbon steel during its austenitic decomposition in a high magnetic field
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DOI：
10.1016/j.actamat.2005.08.007
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发表时间：
2005-11
期刊：
影响因子：
9.4
通讯作者：
Yudong Zhang;C. Esling;J. Lecomte;C. He;Xiang Zhao;L. Zuo
中科院分区：
文献类型：
--
作者：
Yudong Zhang;C. Esling;J. Lecomte;C. He;Xiang Zhao;L. Zuo
在奥氏体扩散分解过程中，对中碳钢施加12 T强磁场，研究了强磁场对铁素体取向差角分布、晶界特征和织构形成的影响。结果表明，强磁场能显著降低低角度取向差的出现频率，增加低角度重合晶界的出现，特别是铁素体的θ 3。这可能是由于磁场引起的相变温度升高，从而降低了相变应力。较宽的晶粒生长温度范围为移动的较少的晶界提供了较长的时间来扩大它们的面积。此外，磁场可以增强横向场向纤维（T001）。可以认为，磁场的影响是由Fe原子磁矩之间的偶极相互作用引起的。
A 12-T magnetic field has been applied to a medium plain carbon steel during the diffusional decomposition of austenite and the effect of a high magnetic field on the distribution of misorientation angles, grain boundary characteristics and texture formation in the ferrite produced has been investigated. The results show that a high magnetic field can cause a considerable decrease in the frequency of low-angle misorientations and an increase in the occurrence of low Σ coincidence boundaries, in particular the Σ3 of ferrite. This may be attributed to the elevation in the transformation temperature caused by the magnetic field and, therefore, the reduction of the transformation stress. The wider temperature range for grain growth offers longer time to the less mobile Σ boundaries to enlarge their areas. Moreover, the magnetic field can enhance the transverse field-direction fiber (〈001〉∥TFD). It can be assumed that the effects of the field were caused by the dipolar interaction between the magnetic moments of Fe atoms.