摘要
The influence of high magnetic field with different strength on the proeutectoid ferrite transformation in high purity Fe-0.36 wt% C during diffusional Υ phase transformation was studied. It was found that the formation of acicular ferrite （ie. Widmanst3tten ferrite） was obviously suppressed by the applied high magnetic field. The stronger the magnetic field is, the more the ferrite grains elongating and aligning along the field direction will be. This is attributed to additional driving force for phase transformation and demagnetization effect introduced by the applied magnetic field. This is also considered to be related to the preferential growth of proeutectoid ferrite nuclei along field direction caused by magnetic dipolar interaction.
The influence of high magnetic field with different strength on the proeutectoid ferrite transformation in high purity Fe-0.36 wt% C during diffusional Υ phase transformation was studied. It was found that the formation of acicular ferrite （ie. Widmanst3tten ferrite） was obviously suppressed by the applied high magnetic field. The stronger the magnetic field is, the more the ferrite grains elongating and aligning along the field direction will be. This is attributed to additional driving force for phase transformation and demagnetization effect introduced by the applied magnetic field. This is also considered to be related to the preferential growth of proeutectoid ferrite nuclei along field direction caused by magnetic dipolar interaction.
基金
supported by the National Natural Science Foundation of China (Grant Nos.50771026,50971034 and 50911130365)
the Program for Changjiang Scholars and Innovative Research Team in University (Grant No.IRT0713)
the Programme of Introducing Talents of Discipline to Universities (Grant No.B07015)
