Softening Kinetics in Nb-Microalloyed TRIP Steels with Increased Mn Content

Adam Grajcar; Roman Kuziak

doi:10.4028/www.scientific.net/AMR.314-316.119

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 314-316Softening Kinetics in Nb-Microalloyed TRIP Steels...

Softening Kinetics in Nb-Microalloyed TRIP Steels with Increased Mn Content

Abstract:

Two 5Mn-1.5Al TRIP steels with and without Nb microaddition were developed in the present study. The steels contain bainite, martensite, interlath retained austenite and martensite- austenite islands. The paper presents the results of the compression tests carried out at various temperatures using the Gleeble simulator. To analyze the kinetics of static recrystallization in these steels, a softening kinetics were determined in a double-hit compression test. It was found that the dynamic recovery is a main thermally activated process occurring during hot deformation. The Nb microalloyed steel has higher flow stresses and peak strains than the Nb-free steel. A solute drag effect of Nb results in a slower softening kinetics of Nb containing steel. The effects of Mn on the retardation of Nb(C,N) precipitation and hot deformation characteristics are also discussed.

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Advanced Materials Research (Volumes 314-316)

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119-122

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.314-316.119

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Online since:

August 2011

Authors:

Adam Grajcar, Roman Kuziak

Keywords:

Compression Test, Dynamic Recovery, Dynamic Recrystallization (DRX), Manganese Steel, Nb Microalloying, Softening Kinetics, Static Recrystallization, TRIP Steel

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