Investigation on a Mn-Ti High Strength Steel


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By controlled rolling and cooling process, a Mn-Ti high strength steel with yield strength on the order of 700MPa had been developed successfully. The microstructure consists of fine lath shaped bainite and ferrite. The strengthening factors of this steel are attributed to the tiny interlocked distribution of bainite lath and titanium carbide precipitation. When the amount of bainite is more than 70%, the yield strength of steel is higher than 700MPa, and good mechanical performances are obtained. As a result of presence of finely dispersed bainite slabs the plasticity of steel is improved, with the steel’s elongation being about 19%. Many tiny TiC precipitates are observed under transmission electron micrograph, and these particles result in precipitation strengthening.



Key Engineering Materials (Volumes 340-341)

Edited by:

N. Ohno and T. Uehara




H. L. Yi et al., "Investigation on a Mn-Ti High Strength Steel", Key Engineering Materials, Vols. 340-341, pp. 465-470, 2007

Online since:

June 2007




[1] Yoshimasa Funakawa, Tsuyoshi Shiozaki, Kunikazu Tomita. ISIJ International, Vol. 44 (2004), p. (1945).


[2] Misra RDK, Nathani H, Hartmann JE. Materials Science and Engineering A, Vol. 394 (2005), p.339.

[3] Nakata Naoki, Militzer Matthias. ISIJ International, Vol. 45 (2005), p.82.

[4] Shang C, Wang X, He X. Vol. 8 (2001), p.224.

[5] Annual Book of ASTM Standards, ASTM Designation E8, Philadelphia, PA, 1989, 03. 01, p.131.

[6] J.P. Naylor: Metallurgical Transactions A (Physical Metallurgy and Materials Science), Vol. 10A (1979), p.861.

[7] H. Kobayashi: ISIJ Int., Vol. 32 (1992), p.973.