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Mechanism of ferrite grain refinement in the (γ + α) region of weathering steel Cu–P–Cr–Ni–Mo

Published online by Cambridge University Press:  28 August 2015

Chunling Zhang ,
Mengmeng Zhang ,
Tengteng Guo ,
Jinfeng Yang ,
Yuting Kong ,
Dayong Cai  and
Qiang Li
Chunling Zhang*
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, China; and School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China
Mengmeng Zhang*
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, China
Tengteng Guo
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, China
Jinfeng Yang
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, China
Yuting Kong
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, China
Dayong Cai
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, China
Qiang Li
Affiliation:
Metallic Material Department, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

In this study, the mechanism of ferrite grain refinement during warm compression deformation in the (γ + α) region of Cu–P–Cr–Ni–Mo weathering steel was analyzed by optical microscopy and electron backscatter diffraction. Results showed that fine equiaxed ferrite grains surrounded by high-angle boundaries (HABs) formed along the initial boundaries as the strain is increased. As the deformation temperature decreased, some low-angle boundaries shifted to HABs in intragranular ferrite, and ferrite grain refinement was promoted by continuous dynamic recrystallization. Microstructural observations also indicated that the fine ferrite grains of approximately 1.4–3 μm in size can be obtained by deformation at 750 °C with a strain over 0.69 because of ferrite dynamic recrystallization. Moreover, both strain and deformation temperature influenced the ferrite grain size and volume fraction. Thus, the predominant mechanism for ferrite grain refinement in the (γ + α) region was continuous dynamic recrystallization.

Keywords

compression testing(γ + α) regionferrite grain refinementcontinuous dynamic recrystallizationelectron backscatter diffraction
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 16 , 28 August 2015 , pp. 2508 - 2515
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

Dong, H. and Sun, X.: Deformation induced ferrite transformation in low carbon steels. Curr. Opin. Solid State Mater. Sci. 9, 269 (2005).CrossRefGoogle Scholar
Wang, R.Z. and Lei, T.C.: Dynamic recrystallization of ferrite in a low carbon steel during hot rolling in the (F+A) two-phase range. Scr. Mater. 31, 1193 (1994).Google Scholar
Rizhi, W. and Lei, T.C.: Substructural evolution of ferrite in a low carbon steel during hot deformation in (F+A) two-phase range. Scr. Mater. 28, 629 (1993).Google Scholar
Hurley, P.J. and Hodgson, P.D.: Formation of ultra-fine ferrite in hot rolled strip: Potential mechanisms for grain refinement. Mater. Sci. Eng., A 302, 206 (2001).CrossRefGoogle Scholar
Beladi, H., Kelly, G.L., Shokouhi, A., and Hodgson, P.D.: The evolution of ultrafine ferrite formation through dynamic strain-induced transformation. Mater. Sci. Eng., A 371, 343 (2004).Google Scholar
Santos, D.B., Bruzszek, R.K., Rodrigues, P.C.M., and Pereloma, E.V.: Formation of ultra-fine ferrite microstructure in warm rolled and annealed C–Mn steel. Mater. Sci. Eng., A 346, 189 (2003).Google Scholar
Tsuji, N., Matsubara, Y., and Saito, Y.: Dynamic recrystallization of ferrite in interstitial free steel. Scr. Mater. 37, 477 (1997).CrossRefGoogle Scholar
Song, R., Ponge, D., Raabe, D., and Kaspar, R.: Microstructure and crystallographic texture of an ultrafine grained C–Mn steel and their evolution during warm deformation and annealing. Acta Mater. 53, 845 (2005).Google Scholar
Gourdet, S. and Montheillet, F.: A model of continuous dynamic recrystallization. Acta Mater. 51, 2685 (2003).Google Scholar
Gourdet, S. and Montheillet, F.: An experimental study of the recrystallization mechanism during hot deformation of aluminium. Mater. Sci. Eng., A 283, 274 (2000).Google Scholar
Hong, S.C. and Lee, K.S.: Influence of deformation induced ferrite transformation on grain refinement of dual phase steel. Mater. Sci. Eng., A 323, 148 (2002).Google Scholar
Huang, Y.D. and Froyen, L.: Important factors to obtain homogeneous and ultrafine ferrite-pearlite microstructure in low carbon steel. J. Mater. Process. Technol. 124, 216 (2002).CrossRefGoogle Scholar
Sun, Z.Q., Yang, W.Y., Qi, J.J., and Hu, A.M.: Deformation enhanced transformation and dynamic recrystallization of ferrite in a low carbon steel during multipass hot deformation. Mater. Sci. Eng., A 334, 201 (2002).CrossRefGoogle Scholar
Huang, Y.D., Yang, W.Y., and Sun, Z.Q.: Formation of ultrafine grained ferrite in low carbon steel by heavy deformation in ferrite or dual phase region. J. Mater. Process. Technol. 134, 19 (2003).Google Scholar
Abdollah-zadeh, A. and Eghbali, B.: Mechanism of ferrite grain refinement during warm deformation of a low carbon Nb-microalloyed steel. Mater. Sci. Eng., A 457, 219 (2007).Google Scholar
Najafi-zadeh, A., Jonas, J.J., and Yue, S.: Grain refinement by dynamic recrystallization during the simulated warm-rolling of interstitial free steels. Metall. Trans. A 23, 2607 (1992).CrossRefGoogle Scholar
Eghbali, B. and Abdollah-zadeh, A.: Strain induced transformation in a low carbon microalloyed steel during hot compression testing. Scr. Mater. 54, 1205 (2006).CrossRefGoogle Scholar
Kim, Y.M., Kim, S.K., Lim, Y.J., and Kim, N.J.: Effect of microstructure on the yield ratio and low temperature toughness of line pipe steels. ISIJ Int. 42, 1571 (2002).Google Scholar
Gao, F., Xu, Y., Song, B., and Xia, K.: Substructural changes during hot deformation of an Fe-26Cr ferritic stainless steel. Metall. Trans. A 31, 21 (2000).CrossRefGoogle Scholar
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