Abstract
The de composition of austenite following the initial rapid formation of bainitic ferrite in silicon alloyed high-carbon steels isothermally transformed at 380 °C has been studied. The reaction is initiated by the formation of a triclinic carbide, closely relaled to cementite. The carbide is highly symmetric with {952} martensite, and crossings between carbide plates and faulting on the (010)c planes suggest that the carbide formation takes place by shear. The carbide formation is followed by the decomposition of the remaining austenite to ferrite, which is thought to be due to the lowering of the austenite carbon content resulting from the carbide formation.
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B. P. J. SANDVIK, formerly with Laboratory of Physical Metallurgy at Helsinki University of Technology, Finland and Ovako OyAb, Imatra, Finland.
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Sandvik, B.P.J. The Bainite Reaction in Fe-Si-C Alloys: The Secondary Stage. Metall Trans A 13, 789–800 (1982). https://doi.org/10.1007/BF02642392
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DOI: https://doi.org/10.1007/BF02642392