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Magnetic Field-Induced Granular Pearlite at Early Stages of Phase Transformation

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Abstract:

ffects of high magnetic fields (HMF) up to 19.81T on pearlite phase transformation are studied by examination of the microstructures of a Fe-0.47C-2.3Si-3.2Mn (wt %) alloy partially isothermally processed above the eutectoid temperature. The results show that granular pearlite (GP) can be obtained at earlier transformation stages. The evolution of the granular pearlite is always accompanied by the formation of lamellar pearlite. TEM analysis reveals the existence of sub-grain boundaries within GP colonies and indicates that the nucleation of ferrite matrix in GP belongs to multiple nucleation mechanism. Most of carbides at the early stage of pearlite formation are found to precipitate at the α/γ interface--the growing front of ferrite phases, and some of coarse carbides can further develop into thin lamellar cementite.

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Periodical:

Advanced Materials Research (Volume 650)

Pages:

178-184

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.650.178

Citation:

Cite this paper

Online since:

January 2013

Authors:

Xiao Ling Zhou, Ke Han, Zhong Ming Ren, Zeng Li

Keywords:

Magnetic Field, Microstructure, Phase Transformation, TEM

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