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

Abstract:

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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.

Info:

Periodical:

Advanced Materials Research (Volumes 314-316)

Edited by:

Jian Gao

Pages:

119-122

DOI:

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

Citation:

A. Grajcar and R. Kuziak, "Softening Kinetics in Nb-Microalloyed TRIP Steels with Increased Mn Content", Advanced Materials Research, Vols. 314-316, pp. 119-122, 2011

Online since:

August 2011

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Price:

$35.00

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