Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-26T21:41:07.713Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructure evolution of Cu–0.2Mg alloy during continuous extrusion process

Published online by Cambridge University Press:  04 September 2015

Yuan Yuan ,
Cheng Dai ,
Zhou Li ,
Guang Yang ,
Yue Liu  and
Zhu Xiao
Yuan Yuan
Affiliation:
School of Materials Science and Engineering, Central South University, Changsha 410083, China; and China Railway Construction Electrification Bureau Group Kang Yuan New Materials CO., LTD, Jiangyin 214521, China
Cheng Dai
Affiliation:
School of Materials Science and Engineering, Central South University, Changsha 410083, China
Zhou Li*
Affiliation:
School of Materials Science and Engineering, Central South University, Changsha 410083, China; and State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
Guang Yang
Affiliation:
School of Materials Science and Engineering, Central South University, Changsha 410083, China
Yue Liu
Affiliation:
School of Materials Science and Engineering, Central South University, Changsha 410083, China
Zhu Xiao
Affiliation:
School of Materials Science and Engineering, Central South University, Changsha 410083, China; and Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Changsha 410083, China
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

In this study, scanning electron microscope, electron backscatter diffraction, and transmission electron microscope have been used to investigate the microstructure evolution of Cu–0.2Mg alloy during continuous extrusion in mass production. The continuous extrusion could change the size and orientation of as-cast crystallite grains of the alloy. Hardness increased gently in upsetting zone and dropped sharply in adhesion zone. Hardness reached the maximum value in right-angle bending zone; and it decreased rapidly in extending extrusion zone. Upsetting zone was mainly composed of cell blocks and microbands, and adhesion zone mainly consisted of discontinuous recrystallize grain. Shear band and subgrains were formed in right-angle bending zone due to polygonization during shear deformation. In extending extrusion zone and extrusion rod zone, recrystallize microstructures were predominant.

Keywords

Cu–Mg alloyultrafine grain materialscontinuous extrusion processmicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 18 , 28 September 2015 , pp. 2783 - 2791
Copyright
Copyright © Materials Research Society 2015 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Mukai, T., Kawazoe, M., and Higashi, K.: Dynamic mechanical properties of a near-nano aluminum alloy processed by equal-channel-angular-extrusion. Nanostruct. Mater. 10, 755 (1998).Google Scholar
Youssef, K.M., Scattergood, R.O., Murty, K.L., and Koch, C.C.: Nanocrystalline Al-Mg alloy with ultrahigh strength and good ductility. Scr. Mater. 54, 251 (2006).CrossRefGoogle Scholar
Zhao, Y.H., Liao, X.Z., Jin, Z., Valiev, R.Z., and Zhu, Y.T.: Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing. Acta Mater. 52, 4589 (2004).Google Scholar
Kim, Y.G., Ko, Y.G., Shin, D.H., and Lee, S.: Effect of equal-channel angular pressing routes on high-strain-rate deformation behavior of ultra-fine-grained aluminum alloy. Acta Mater. 58, 2545 (2010).Google Scholar
Li, B., Wei, Q., Pei, J., and Zhao, Y.: Flow characteristics of brass rod during continuous extrusion. Procedia Eng. 81, 647 (2014).CrossRefGoogle Scholar
Manninen, T., Katajarinne, T., and Ramsay, P.: Analysis of flash formation in continuous rotary extrusion of copper. J. Mater. Process. Technol. 177, 600 (2006).Google Scholar
Zhao, Y., Song, B., and Yun, X.: Effect of process parameters on sheath forming of continuous extrusion sheathing of aluminum. Trans. Nonferrous Met. Soc. China 22, 3073 (2012).CrossRefGoogle Scholar
Feng, H., Jiang, H., Yan, D., and Rong, L.: Effect of continuous extrusion on the microstructure and mechanical properties of a CuCrZr alloy. Mater. Sci. Eng., A 582, 219 (2013).CrossRefGoogle Scholar
Kong, X., Zhang, H., and Ji, X.: Microstructures and mechanical properties evolution of an Al-Fe-Cu alloy processed by repetitive continuous extrusion forming. Mater. Sci. Eng., A 612, 131 (2014).Google Scholar
Zhang, H., Yan, Q., and Li, L.: Microstructures and tensile properties of AZ31 magnesium alloy by continuous extrusion forming process. Mater. Sci. Eng., A 486, 295 (2008).Google Scholar
Zhao, Y., Liu, P., Liu, X., Chen, X., Ma, F., Li, W., and He, D.: Research progress and application of contact wire for high-speed electric railway. Mater. Rev. 26, 46 (2012). (In Chinese).Google Scholar
Zhu, C., Ma, A., Jiang, J., Li, X., Song, D., Yang, D., Yuan, Y., and Chen, J.: Effect of ECAP combined cold working on mechanical properties and electrical conductivity of conform-produced Cu-Mg alloys. J. Alloys Compd. 582, 135 (2014).Google Scholar
Wang, J., Yun, X., Li, B., Fan, Z., and Song, B.: Microstructure evolution of copper during continuous extrusion process. Nonferrous Met. (Extr. Metall.) 5, 38 (2011). (In Chinese).Google Scholar
Wang, J.: Research on Microstructure of Pure Copper During Continuous Extrusion Process (Dalian University of Technology Doctoral Dissertation, Dalian, 2009). (In Chinese).Google Scholar
Cai, F. and Liu, X.: Numerical simulation analysis of microstructure evolution in the continuous extrusion for CuMg0.3 Cu-Mg alloy. Forg. Stamping Technol. 40, 141 (2015). (In Chinese).Google Scholar
Field, D.P., Eames, R.C., and Lillo, T.M.: The role of shear stress in the formation of annealing twin boundaries in copper. Scr. Mater. 54, 983 (2006).Google Scholar
Field, D.P., Bradford, L.T., Nowell, M.M., and Lillo, T.M.: The role of annealing twins during recrystallization of Cu. Acta Mater. 55, 4233 (2007).CrossRefGoogle Scholar
Christian, J.W. and Mahajan, S.: Deformation twinning. Prog. Mater. Sci. 39, 1 (1995).Google Scholar
Gong, Y.L., Wen, C.E., and Wu, X.X.: The influence of strain rate, deformation temperature and stacking fault energy on the mechanical properties of Cu alloys. Mater. Sci. Eng., A 583, 199 (2013).Google Scholar
Yu, Y.: Theory of Metals (In Chinese), 1st ed. (Metallurgical Industry Press, Beijing, 2000); p. 436.Google Scholar
Gorelik, S.S.: Recrystallization in Metals and Alloys, 1st ed. (MIR Publishers, Moscow, 1981); p. 122.Google Scholar
Wang, W., Brisset, F., Helbert, A.L., Solas, D., Drouelle, I., Mathon, M.H., and Baudin, T.: Influence of stored energy on twin formation during primary recrystallization. Mater. Sci. Eng., A 589, 112 (2014).Google Scholar
Humphreys, F.J. and Hatherly, M.: Recrystallization and Related Annealing Phenomena, 2nd ed. (Elsevier Ltd, Oxford, 2004); p. 261.Google Scholar
Valiev, R.Z. and Langdon, T.G.: Principles of equal-channel angular pressing as a processing tool for grain refinement. Prog. Mater. Sci. 51, 881 (2006).CrossRefGoogle Scholar
Iwahashi, Y., Horita, Z., Nemoto, M., and Langdon, T.G.: An investigation of microstructural tvolution during equal-channel angular pressing. Acta Mater. 45, 4733 (1997).Google Scholar
Iwahashi, Y., Horita, Z., Nemoto, M., and Langdon, T.G.: The process of grain refinement in equal-channel angular pressing. Acta Mater. 46, 3317 (1998).Google Scholar