Abstract
A new route to fabricate ultrafine grained (UFG) ferritic steel sheets without severe plastic deformation is proposed in this article. A low-carbon steel sheet with a duplex microstructure composed of ferrite and martensite was cold-rolled to a reduction of 91% in thickness, and then annealed at 620–700 °C. The microstructure obtained through the process with annealing temperatures below 700 °C was the UFG ferrite including fine cementite particles homogenously dispersed. The grain size of ferrite matrix changed from 0.49 to 1.0 μm depending on the annealing temperature. Dynamic tensile properties of the produced UFG steels were investigated. The obtained UFG ferrite–cementite steels without martensite phase showed high strain rate sensitivity in flow stress. The UFG ferritic steels are expected to have high potential to absorb crash energy when applied to automobile body.
Similar content being viewed by others
References
Tsuji N, Ito Y, Saito Y, Minamino Y (2002) Scripta Mater 47:893. doi:https://doi.org/10.1016/S1359-6462(02)00282-8
Tsuji N, Okuno S, Koizumi Y, Minamino Y (2004) Mater Trans 45:2272. doi:https://doi.org/10.2320/matertrans.45.2272
Jia D, Ramesh KT, Ma E (2003) Acta Mater 5:3495. doi:https://doi.org/10.1016/S1359-6454(03)00169-1
Tsuchida N, Masuda H, Harada Y, Fukaura K, Tomota Y, Nagai K (2008) Mater Sci Eng A 488:446. doi:https://doi.org/10.1016/j.msea.2007.11.047
Segal VM (1995) Mater Sci Eng A 197:157. doi:https://doi.org/10.1016/0921-5093(95)09705-8
Iwahashi Y, Wang J, Horita Z, Nemoto M, Langdon TG (1996) Scripta Mater 35:143. doi:https://doi.org/10.1016/1359-6462(96)00107-8
Valiev RZ, Korznikov AV, Mulyukov RR (1993) Mater Sci Eng A 168:141. doi:https://doi.org/10.1016/0921-5093(93)90717-S
Tanimura S, Mimura K, Umeda T (2003) J Phys IV 110:385. doi:https://doi.org/10.1051/jp4:20020724
Chuman Y, Kimura K, Tanimura S (1997) Int J Impact Eng 19:165. doi:https://doi.org/10.1016/S0734-743X(96)00019-X
Website of Saginomiya Seisakusyo Inc. https://doi.org/www.saginomiya.co.jp/eng/dynamic/zairyo/zairyo08.html. Accessed 22 Aug 2008
Humphreys FJ, Hatherly M (2004) Recrystallization and related annealing phenomena, 2nd edn. Elsevier, Oxford, p 457
Kamikawa N, Sakai T, Tsuji N (2007) Acta Mater 55:5873. doi:https://doi.org/10.1016/j.actamat.2007.07.002
Ueji R, Tsuji N, Minamino Y, Koizumi Y (2002) Acta Mater 50:4177. doi:https://doi.org/10.1016/S1359-6454(02)00260-4
Morito S, Huang X, Furuhara T, Maki T, Hansen N (2004) Proceedings of the 25th Riso international symposium on materials science, p 453
Kamikawa N, Tsuji N, Saito Y (2003) Tetsu-to-Hagane 89:273 (in Japanese)
Takagi S, Tokita Y, Sato K, Shimizu T, Hashiguchi K, Ogawa K et al (2005) Spec Publ Soc Automot Eng No. SP-1954:7
Takahashi M, Uenishi A, Yoshita H, Kuriyama Y (2003) Int Body Eng Conf 2003:7
Tsuchida N, Tomota Y, Nagai K (2004) Tetsu-to-Hagane 90:1043 (in Japanese)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Okitsu, Y., Takata, N. & Tsuji, N. Mechanical properties of ultrafine grained ferritic steel sheets fabricated by rolling and annealing of duplex microstructure. J Mater Sci 43, 7391–7396 (2008). https://doi.org/10.1007/s10853-008-2971-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10853-008-2971-9