Joarder, A and Sarma, D S (1992) Bainite morphologies in a 0.2 C-1.5 Mn steel. Steel Research , 63 (1). pp. 33-38.
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The isothermal transformation products of austenite over a wide range of temperatures and times in the bainitic range in a 0.2 wt.% C-1.5 wt.% Mn steel have been studied by transmission electron microscopy in order to characterise the bainitic microstructures in low-carbon low-alloy steels. Widmanstatten ferrite has formed with alternate layers of austenite (martensite) as a transition product at 600 and 500-degrees-C that has finally transformed on further isothermal transformation to either pearlite (at 600-degrees-C) or upper bainite (at 500-degrees-C). This type of transformation product was referred to as Bl bainite by earlier investigators, but on the basis of the present investigation it is concluded that such ferrite-austenite (martensite) structures are not bainitic as this is not the final transformation product either at 600 or 500-degrees-C. Both upper bainite and lath-type lower bainite are formed at 450-degrees-C while the transformation product has been only lath-type lower bainite at 400-degrees-C.
|Uncontrolled Keywords:||Low-Carbon; Transformation; Alloys|
|Deposited By:||Sahu A K|
|Deposited On:||23 May 2012 11:04|
|Last Modified:||23 May 2012 11:04|
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