Substructure Evolution of Ti-6Al-2Zr-1Mo-1V Alloy Isothermally Hot Compressed in α+β Two-Phase Region

doi:10.1007/s40195-013-0161-5

Acta Metallurgica Sinica (English Letters)

Previous Articles Next Articles

Substructure Evolution of Ti-6Al-2Zr-1Mo-1V Alloy Isothermally Hot Compressed in α+β Two-Phase Region

Chuan WU, He YANG, Hongwei LI

State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China

Received:2013-03-23 Revised:2013-06-11 Online:2013-10-25 Published:2013-09-13
Contact: He YANG
Supported by:
National Basic Research Program of China (No. 2010CB731701), the National Natural Science Foundation of China (Nos. 50935007 and 51175428), Foundation for Fundamental Research of Northwestern Polytechnical University in China (No. NPU-FFR-JC20100229), and the 111 Project (No.B08040).

Abstract

Abstract:

Substructure evolution significantly influences the flow behavior of titanium alloys in isothermal hot compression. This paper presents a physical experiment (isothermal hot compression and electron backscatter diffraction, EBSD) and a cellular automaton (CA) method to investigate the substructure evolution of a near-α titanium alloy Ti-6Al-2Zr-1Mo-1V (TA15) isothermally compressed in theα +β two-phase region. In the CA model, the subgrain growth, the transformation of low angle boundaries (LABs) to high angle boundaries (HABs) and the dislocation density evolution were considered. The dislocation density accumulating around the subgrain boundaries provided a driving force and made the transformation of the LABs to HABs. The CA model was employed to predict the substructure evolution, dislocation density evolution and flow stress. In addition, the effects of strain, strain rate and temperature on the relative frequency of the HABs were analyzed and discussed. To verify the CA model, the predicted results including the relative frequency of the HABs and the flow stress were compared with the experimental values.

Key words: Substructure evolution, Cellular automaton modeling, Dislocation density evolution, EBSD technique

Chuan WU, He YANG, Hongwei LI. Substructure Evolution of Ti-6Al-2Zr-1Mo-1V Alloy Isothermally Hot Compressed in α+β Two-Phase Region[J]. Acta Metallurgica Sinica (English Letters), DOI: 10.1007/s40195-013-0161-5.

References

[1]Y.C. Zhu, W.D. Zeng and Y.Q. Zhao, Mater. Sci. Eng. A 552 (2012) 384.
[2]Z.C. Sun and H. Yang, Mater. Sci. Eng. A 523 (2009) 184.
[3]X.G. Fan, H. Yang, Z.C. Sun and D.W. Zhang, Mater. Sci.Eng. A 527 (2012) 5391.
[4]Z.C. Sun, H. Yang and G. J. Han, Mater. Sci. Eng. A 527 (2010) 3464.
[5]D. He, J.C. Zhu, Z.H. Lai, Y. Liu and X.W. Yang, Mater.Design 46 (2013) 38.
[6]L.J. Huang, L. Geng and A.B. Li, Mater. Sci. Eng. A 505 (2009) 136.
[7]M.M. Tong, D.Z. Li and Y.Y. Li, Acta Mater. 52 (2004) 1155.
[8]H.G. Hesselbarth and I.R. Gobel, Acta Metall 39(1991) 2135.
[9]R.L. Goetz and V. Seetharaman, Scr. Mater. 38 (1998) 405.
[10]D. Raabe, Acta Mater. 52 (2004) 2653.
[11]B.J. Yu, X.J. Guan, L.J. Wang, Q.K. Zeng, Q.Q. Liu and Y.Cao, Acta Metall. Sin. (Engl. Lett.) 24 (2011) 287.
[12]R. Ding and Z.X. Guo, Mater. Sci. Eng. A 365 (2004) 172.
[13]F. Chen, Z.S. Cui, J. Liu, W. Chen and S.J. Chen,Mater. Sci. Eng. A 527 (2010) 5539.
[14]C.W. Zheng, N.M. Xiao, D.Z. Li and Y.Y. Li, Comput.Mater. Sci. 45 (2009) 568.
[15]Y. J. Lan, N.M. Xiao, D.Z. Li and Y.Y. Li, Acta Mater.53 (2005) 991.
[16]F.J. Humphreys and M. Hatherly, Recrystallization and Related Annealing Phenomena, Pergamon Press, Britain, 2004, p. 202.
[17]R. Ding and Z.X. Guo, Acta Mater. 49(2001)3163.
[18]W.T. Read and W. Shockley, Phys. Rev. 78(1950)275.
[19] U.F. Kocks and H. Mecking, Prog. Mater. Sci. 48(2003) 171.
[20]X.G. Fan and H. Yang, Int. J. Plast. 27(2011)1833.
[21]S. Gourdet and F. Montheillet, Acta Mater. 51 (2003) 2685.
[22]F. Montheillet, O. Lurdos and G. Damamme, Acta Mater. 57 (2009) 1602.
[23]Y. P. Varshni, Phys. Rev. B 2 (1970) 3952.
[24]L. Jiao, M.Q. Li, X.L. Li and Y.P. Shi, Mech. Mater.42 (2010) 157.
[25]J. Lin and J.B. Yang, Int. J. Plast. 15 (1999)1181.
[26] J.S. Pan, J.M. Tong and M.B Tian, Foundation of Materials Science, Tsinghua University Press, Beijing, 2011, p. 227.(in Chinese)

Substructure Evolution of Ti-6Al-2Zr-1Mo-1V Alloy Isothermally Hot Compressed in α+β Two-Phase Region

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 0

Recommended Articles

Metrics

Comments