Study on the Constitutive Equation of High-Temperature of High-Elastic Cu-20.0Ni-5.0Sn-0.25Zn-0.22Mn Alloy

Abstract:

The high-elastic Cu-20.0Ni-5.0Sn-0.25Zn-0.22Mn alloy was designed and prepared using a 830°C/2h+850°C/2h dual-stage homogenization annealing process. The true stress-strain curves of well annealed Cu-20.0Ni-5.0Sn-0.25Zn-0.22Mn alloy were plotted as a function of compressive temperature and strain rate. The results showed that the stage division of thermal compression deformation is temperature dependent, which involves work hardening, dynamic recovery and recrystallization stages. The maximum value of the true stress increases as the strain rate gets larger, but decreases as the deformation temperature rises. The high temperature compression deformation process of the alloy is a thermal activated process, and the corresponding constitutive equation of the true stress-strain is established.

• Periodical: Materials Science Forum (Volume 956)
• Pages: 169-178
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.956.169
• Online since: June 2019
• Authors: Geng Sheng Cai*, Zhi Hong Cai, Fu Ping Liu, Hua Gang Yu
• Keywords: Constitutive Equation, Cu-20.0Ni-5.0Sn-0.25Zn-0.22Mn Alloy, High Elasticity, High Temperature Deformation, Homogenization Annealing, True Stress-Strain

References

[1] W.S. Li, W.P. Wang, Y. Lu, et al. Research and application status of high strength copper-based alloy materials, Non-ferrous Metals, 54(2002) 30-34.

[2] Z. Li, Q. Lei, S.H. Li, et al. Research progress and prospects of ultra-high elastic copper alloy materials[J]. Materials Review A: Summary, 29(2015) 1-5.

[3] S.L. Yang, W.B. Xie. Research and application of Cu-Ni-Sn alloy, Shanghai Nonferrous Metals, 33(2012) 41-45.

[4] S.Z. Zhang, B.H. Jiang, W.J. Ding. Research progress on spinodal Cu-Ni-Sn alloys in China, Materials Review, 20(2006) 84-86.

[5] W. Cai, S.L. Yang, L. Chen, et al. Effect of alterative and homogenization on the microstructure of Cu-20Ni-5Sn alloy[C]// Materials Science Forum. Trans Tech Publications, 749(2013) 421-424.

DOI: 10.4028/www.scientific.net/msf.749.421

[6] R.Q. Liu, A.Y. Li, L.J. Peng, et al. Microstructure and properties of as-castCu-20Ni-5Sn alloy[C]// Applied Mechanics and Materials. Trans Tech Publications, 341(2013) 18-22.

DOI: 10.4028/www.scientific.net/amm.341-342.18

[7] F. Xue, J. Zhou, P.P. Li, et al. Effect of interfacial reaction and interfacial tension on wettability of Sn-Zn-Bi solder, Journal of Southeast University (Natural Science Edition), 37(2007) 635-638.

[8] J. Romanowska, G. Wnuk, P. Romanowski. Experimental study on thermodynamics of the Cu-Ni-Sn-Zn system, Archives of Metallurgy and Materials, 53(2008) 1107-1110.

[9] Y. Xing, Z. Li, X.P. Gan, et al. Effect of heat treatment on microstructure and properties of Cu-15Ni-8Sn alloys, Rare Metal Materials and Engineering, 147(2018) 286-291.

[10] Y. Wu, S.L. Yang. Research and development of high elastic alloy Cu-Ni-Sn, Shanghai Nonferrous Metals, 35(2014) 38-44.

[11] Y.P. Liu. Microstructure and Properties of Cu-9Ni-6Sn Elastic Copper Alloy, Journal of Jiangxi University of Science and Technology, 30(2009) 74-78.

[12] Z.Q. Zheng. Material Science foundation, Changsha, Central South University Press, 2013，pp.339-369.

[13] H.J. McQueen, N.D. Ryan. Constitutive analysis in hot working, Materials Science and Engineering A, 322(2002) 43-63.

DOI: 10.1016/s0921-5093(01)01117-0

[14] H.J. McQueen, S. Yue, N.D. Ryan, et al. Hot working characteristics of steels in austenitic state, Journal of Material Processing Technology, 53(1995) 293-310.

DOI: 10.1016/0924-0136(95)01987-p

[15] C. Zener, J.H. Hollomon.Effect of strain rate upon plastic flow of steel, Journal of Applied Physics, 1(1994) 22-32.

DOI: 10.1063/1.1707363

[16] X.L. Zhao, J.S. Qiao, J.H. Chen. Study on hot deformation behavior of 6061 aluminum alloy, Hot Working Technology, 38(2009) 10-12.