3-D MORPHOLOGY OBSERVATION OF DEGENERATE FERRITE IN STEEL Fe-0.28C-3.0Mo USING SERIAL SECTIONING AND COMPUTER-AIDED RECONSTRUCTION

Acta Metall Sin

2005, Vol. 41

Issue (12): 1237-1242 DOI:

Research Articles

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3-D MORPHOLOGY OBSERVATION OF DEGENERATE FERRITE IN STEEL Fe-0.28C-3.0Mo USING SERIAL SECTIONING AND COMPUTER-AIDED RECONSTRUCTION

WU Kaiming

Department of Applied Physics; The Hubei Province Key Laboratory of Refractories and Ceramics---Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory; Wuhan University of Science and Technology; Wuhan 430081

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WU Kaiming. 3-D MORPHOLOGY OBSERVATION OF DEGENERATE FERRITE IN STEEL Fe-0.28C-3.0Mo USING SERIAL SECTIONING AND COMPUTER-AIDED RECONSTRUCTION. Acta Metall Sin, 2005, 41(12): 1237-1242 .

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Abstract 3-D morphology of the degenerate ferrite formed below the bay of the TTT diagram in an Fe-0.28C-3.0Mo (mass fraction, %) steel has been revealed by utilizing serial sectioning in conjunction with computer-aided reconstruction and visualization. The degenerate ferrite is initially formed at prior austenite boundary and then grows toward grain interior rather than along the grain boundary. The degenerate ferrite consists of rod-like subunits, each several micron in length and 1-2 μm in diameter. The peculiar morphology of ferrite may be attributed to the repeated nucleation, growth and coalescence of the adjacent ferrite crystals.

Key words: steel Fe-0.28C-3.0Mo phase transformation bainite

Received: 13 April 2005

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