Toughness of Advanced High Strength Bainitic Steels

Abstract:

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Carbide free bainite has achieved the highest strength and toughness combinations to date for bainitic steels in as-rolled conditions. By alloying designing and with the help of phase transformation theory, it was possible to improve simultaneously the strength and toughness because of the ultra-fine grain size of the bainitic ferrite plates. Ultimate tensile strengths ranging from 1600 MPa to 1800 MPa were achieved while keeping a total elongation higher than 10 %. Their toughness at room temperature matches tempered martensitic steels, known to be the best-in-class regarding this property. However, it has been observed that the presence of coalesced bainite leads to a dramatic deterioration in toughness in these novel high strength bainitic steels.

Info:

Periodical:

Materials Science Forum (Volumes 638-642)

Main Theme:

Edited by:

T. Chandra, N. Wanderka, W. Reimers , M. Ionescu

Pages:

118-123

DOI:

10.4028/www.scientific.net/MSF.638-642.118

Citation:

F. G. Caballero et al., "Toughness of Advanced High Strength Bainitic Steels", Materials Science Forum, Vols. 638-642, pp. 118-123, 2010

Online since:

January 2010

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Price:

$35.00

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