EFFECT OF MAGNETIC FIELD STRENGTH ON MICROSTRUCTURE OF PROEUTECTOID FERRITE IN FE-0.76%C ALLOY

Acta Metall Sin

2008, Vol. 44

Issue (5): 615-618 DOI:

Research Articles

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EFFECT OF MAGNETIC FIELD STRENGTH ON MICROSTRUCTURE OF PROEUTECTOID FERRITE IN FE-0.76%C ALLOY

GONG Ming-Long;Xiang Zhao;Shoujing WANG;liang zuo

东北大学辽宁省金属材料微结构设计与控制重点实验室

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GONG Ming-Long; Xiang Zhao; Shoujing WANG; liang zuo. EFFECT OF MAGNETIC FIELD STRENGTH ON MICROSTRUCTURE OF PROEUTECTOID FERRITE IN FE-0.76%C ALLOY. Acta Metall Sin, 2008, 44(5): 615-618 .

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Abstract The present studies are to investigate the microstructural features of proeutectoid ferrite during transformation from austenite to ferrite under different magnetic field strength on Fe-0.76%C alloy. It’s found that the amount of proeutectoid ferrite from austenite to ferrite phase transformatio increased considerably with the increase of magnetic field strength. The carbon content of eutectoid point increases considerably also as the increase of magnetic field strength. The most possible reason is that the magnetic field shifts the eutectoid point to high carbon and high temperatures sides and increases the starting-temperature of the phase transformation from austenite to ferrite. The preutectoid ferrite grains elongated along the magnetic field direction, and the angle between the major axis of proeutectoid ferrite and magnetic field direction was decreased with the increase of magnetic field strength. the most possible reason is that the preutectoid ferrite became the magnetic dipolar under high magnetic field, and then austenite atom around the preutectoid ferrite as magnetic dipolar was prone to diffusion to ferrite grain along the magnetic field direction.

Key words: high magnetic field Fe-0.76%C alloy proeutectoid ferrite microstructure

Received: 26 September 2007

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