Influence of Electric Current Pulses on the Microstructure and Mechanical Properties of X70 Pipeline Steel

Abstract:

The effect of high electric current pulse on the microstructure and macroscopic mechanical behavior of X70 pipeline steel was studied. With the increasing of current density, the grains become refined and the tensile strength has an evident improvement without a decrease in elongation rate. The theoretical analysis shows that two kinds of refinement mechanisms, recrystallization and phase transformation, compete when the exerted current densities differ. Therefore, the ECP treatment should provide a promising method to refine materials and to improve their physical properties by using different current densities.

• Periodical: Advanced Materials Research (Volumes 391-392)
• Pages: 535-539
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.391-392.535
• Online since: December 2011
• Authors: Wen Bin Dai, Xin Li Wang, Li Li Chen, Lin Zhao, Jing Kun Yu
• Keywords: Electric Current Pulses, Grain Refinement, Pipeline Steel

References

[1] H. Gleiter: Prog. Mater. Sci. Vol. 33 (1989), p.231.

[2] K Lu: Mater. Sci. Eng. Vol. R16 (1996), p.161.

[3] C. Suryanarayana: Int. Mater. Rev. Vol. 40 1995, p.41.

[4] Z.H. Lai, H. Conrad, G.Q. Teng and Y.S. Chao: Mater. Sci. Eng. Vol. A 287 (2000), p.238.

[5] Y.Z. Zhou, R.S. Qin, S.H. Xiao, G.H. He and B.L. Zhou: J. Mater. Res. Vol. 15 (2000), p.1056.

[6] Y.Z. Zhou, W. Zhang, B.Q. Wang, G.H. He and J.D. Guo: J. Mater. Res. Vol. 17 (2002), p.2105.

[7] W. Zhang, M.L. Sui, K.Y. Hu, D.X. Li, X.N. Guo, G.H. He and B.L. Zhou: J. Mater. Res. Vol. 15 (2000), p. (2065).

[8] H. Conrad and A. F. Sprecher: Dislocation in Solids (Elservier, Amsterdam 1989).

[9] M.C. Zhao, Y.Y. Shan, J.B. Qu, K. Yang, S. Gao and L. Zheng: Acta Metall. Sinica. Vol. 37 (2001), p.179.

[10] Recrystallization: Grain Growth and Textures (ASM 1996).

[11] P. Cottrill and P.R. Mould: Recrystallization and Grain Growth in Metals (Wiley, New York 1976).

[12] M. A. Mayers and K. K. Chawla: Mechanical Behavior of Materisls (Prentice-Hall, New Jersey 1998).

[13] H. Conrad, N. Karam, S. Mannan and A. F. Spercher: Scripta Metall. Vol. 22 (1988), p.235.

[14] S.H. Xiao, Z.Y. Zhou, S.D. Wu, G. Yao, S.X. Li and B.L. Zhou: Acta. Metall. Sinica. Vol. 36 (2000), p.1237.

[15] H.J. Ernst, F. Charra and L. Douillard: Science Vol. 279 (1998), p.679.

[16] D.W. Tang, B.L. Zhou, H. Cao and G.H. He: Appl. Phys. Lett. Vol. 59 (1991), p.3113.

[17] E.A. Brandes and G.B. Brook: Smithells Metals Reference Book (Butterworth, Heinemann 1992).

[18] Y.Z. Zhou, S.H. Xiao and J.D. Guo: Mater. Lett. Vol. 58 (2004), p. (1948).

[19] Y. Dolinsky and T. Elperin: Phys. Rev. B. Vol. 47 (1993), p.14778.

[20] R.S. Qin, H.C. Yan, G.H. He and B.L. Zhou: Chin. J. Mater. Res. Vol. 9 (1995), p.219.