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On the kinetics of martensite formation in a duplex stainless steel


O U Osuoji

Abstract



Studies have been made of the kinetics of martensite transformation in a duplex stainless steel of composition 21Cr-6.6Ni, 2.5M0, 1.6Cu, <.0.03C (wt.%) Solution treatment at 1050οC for 1 hr was followed by deformation at the subzero temperatures of –70 and –196οC. The kinetics of the γ → α1 transformation in the duplex stainless steel is confirmed to be sigmoidal in nature by the results obtained. Nearly constant rate of transformation occurs up to 50% reduction, then a stimulating effect thereafter. Saturation of the transformation would occur in reduction range of 50-80%.



Journal of the Nigerian Association of Mathematical Physics Vol. 8 2004: pp. 323-326

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eISSN: 1116-4336