You are here

Home » Content

Investigation on the effect of Equal-Channel Angular Pressing process on the pure copper grain size by EBSD

Journal Name:

  • Cumhuriyet Üniversitesi Fen Fakültesi Fen Bilimleri Dergisi

Publication Year:

  • 2015

Key Words:

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
ECAP is a suitable technique for producing ultrafine-grained high-strength materials with desirable mechanical properties. In this study, high-purity copper bars were first processed through the ECAP method. The microstructure of the copper was changed due to the induced hydrostatic pressure and shear strain. Combined with a very high shear strain, this pressure generates high-density crystallographic defects that, in turn, result in the creation of fine grains. Initially, conventional techniques including optical microscopy metallography and FESEM were used to measure the grain size changes; however, they failed to determine the grain boundaries. Finally, changes in the grain size induced by ECAP were measured using EBSD. According to the EBSD results, grain size decreased from 60.8 μm, for a conventional sample, to 5.4 μm after eight passes of ECAP.
Bookmark/Search this post with
FULL TEXT (PDF): 
PDF icon arastirmax-investigation-effect-equal-channel-angular-pressing-process-pure-copper-grain-size-ebsd.pdf
  • 6
1262
1274
  • English

REFERENCES

References: 

[1] Iwahashi, Y. Horita, Z. Nemoto, M. and Langdon, T., The process of grain
refinement in equal-channel angular pressing, Acta Materialia, Volume 46, Issue 9,
Pages 3317-3331, 1998.
[2] ASM handbook, Volume 9., Metallography and microstructures, ASM International,
The materials information company, 2004.
1 Electropolish is a mechanical technique whereas etching is a chemical technique
60.8
9.84
5.48
0
5
10
15
20
25
30
35
40
45
50
55
60
65
0 1 2 3 4 5 6 7 8
Grain size (μm)
ECAP passes
BAGHERI, SARAEIAN, AMINI
1274
[3] Han, Y. Li, J. Huang, G. Lv, Y. Shao, X. Lu, W and Zhang, D., Effect of ECAP
numbers on microstructure and properties of titanium matrix composite, Materials &
Design, Vol 75, pp. 113-119, 2015.
[4] Hoseini, M. Meratian, M. Toroghinejad, M.R. and Szpunar, J.A., Texture
contribution in grain refinement effectiveness of different routes during ECAP,
Materials Science and Engineering, Vol 497, Issues 1–2, pp. 87-92, 2008.
[5] Bian, L. Liang, W. Xie, G. Zhang, W. and Xue, J., Enhanced ductility in an Al–
Mg2Si in situ composite processed by ECAP using a modified BC route, Materials
Science and Engineering, Vol 528, Issue 9, pp. 3463-3467, 2011.
[6] Vijayashakthivel, A.T. Srikantha Dath, T.N. and Krishnamurthy, R., Response of
copper to Equal Channel Angular Pressing with different processing temperature,
Procedia Engineering, Vol 97, pp. 56-63, 2014.
[7] ASTM E3 - 11, (2013), Standard Guide for Preparation of Metallographic
Specimens, ASTM International, West Conshohocken, PA, 2013.
[8] ASTM E 407-07ɛ1, (2013), Standard Practice for Microetching Metals and Alloys,
ASTM International, West Conshohocken, PA, 2013.
[9] ASTM E ASTM E 883-11, (2013), Standard Guide for Reflected–Light
Photomicrography, ASTM International, West Conshohocken, PA, 2013.
[10] ASTM E 112-12, (2013), Standard Test Methods for Determining Average Grain
Size, ASTM International, West Conshohocken, PA, 2013.
[11] Oxford Instruments, (2013), Introduction to EBSD, http://www.ebsd.com/.
EBSD.com is an educational site by Oxford Instruments.

Thank you for copying data from http://www.arastirmax.com