DOI QR코드

DOI QR Code

Microstructure and Mechanical Properties of a Copper Alloy Sheet Processed by a Differential Speed Rolling

이속압연에 의해 가공된 동합금 판재의 조직 및 기계적 특성

  • Lee, Seong-Hee (Department of Advanced Materials Science and Engineering, Mokpo National University)
  • 이성희 (국립목포대학교 신소재공학과)
  • Received : 2012.10.08
  • Accepted : 2012.10.15
  • Published : 2012.11.27

Abstract

The microstructure and mechanical properties of a copper alloy sheet processed by differential speed rolling (DSR) were investigated in detail. A copper alloy with thickness of 3 mm was rolled to a 50% reduction at ambient temperature without lubrication and with a differential speed ratio of 2.0:1. For comparison, conventional rolling (CR), in which the rolling speeds of the upper and lower rolls is 2.0 m/min, was also performed under the same rolling conditions. The shear strain of the sample processed by CR showed positive values at the positions of the upper roll side and negative values at the positions of the lower roll side. On the other hand, the sample processed by the DSR showed zero or positive shear strain values at all positions. However, the microstructure and mechanical properties of the as-rolled copper alloys did not show such significant differences between the CR and the DSR. The samples rolled by the CR and the DSR exhibited a typical deformation structure. In addition, the DSR processed samples showed a typical rolling texture in which {112}<111>, {011}<211> and {123}<634> components were developed at all positions. Therefore, it is concluded that the DSR was very effective for the introduction of a uniform microstructure throughout the thickness of the copper alloy.

References

  1. H. C. Kwon, Comprehension of Copper and Copper Alloys, P.522, Korean Steelmaking Newspaper Corp., Korea (2008) (in Korean).
  2. T. Kamijo, S. Shinya and H. Hukutomi, J. Jpn. Soc. Tech. Plast. 25(280), 375 (1984).
  3. Q. Cui and K. Ohori, Mater. Sci. Technol., 16, 1095 (2000). https://doi.org/10.1179/026708300101507019
  4. K. -H. Kim and D. N. Lee, Acta Mater., 49, 2583 (2001). https://doi.org/10.1016/S1359-6454(01)00036-2
  5. S. H. Lee and D. N. Lee, Int. J. Mech. Sci., 43, 1997 (2001). https://doi.org/10.1016/S0020-7403(01)00025-X
  6. T. Sakai, S. Hamada and Y. Saito, Scr. Mater., 44, 2569 (2001). https://doi.org/10.1016/S1359-6462(01)00932-0
  7. T. Sakai, K. Yoneda and Y. Saito, Mater. Sci. Forum, 396-402, 309 (2002). https://doi.org/10.4028/www.scientific.net/MSF.396-402.309
  8. T. Hirohata, S. Masaki and S. Shima, J. Mater. Process. Tech. 111, 113 (2001). https://doi.org/10.1016/S0924-0136(01)00492-7
  9. W. J. Kim, J. D. Park and W. Y. Kim, J. Alloys Compd., 460, 289 (2008). https://doi.org/10.1016/j.jallcom.2007.06.050
  10. S. H. Lee, T. Sakai and D. H. Shin, Mater. Trans., 44, 1382 (2003). https://doi.org/10.2320/matertrans.44.1382
  11. J. Watanabe, T. Sakai, N. Iwamoto and H. Utsunomiya, J. Jpn. Res. Inst. Adv. Cu-Base Mater. Tech., 44, 73 (2005).
  12. S. H. Lee, D. J. Yoon, T. Sakai, S. H. Kim and S. Z. Han, J. Kor. Inst. Met. & Mater., 47(2), 121 (2009) (in Korean).
  13. S. H. Lee, D. J. Yoon, K. Euh, S. H. Kim and S. Z. Han, Kor. J. Met. Mater., 48(1), 77 (2010) (in Korean). https://doi.org/10.3365/KJMM.2010.48.01.077
  14. N. Muramatsu, R. Takeuchi, N. Yamagami, T. Sakai and H. Utsunomiya, J. Jpn. Res. Inst. Adv. Cu- Base Mater. Tech., 48, 73 (2009).
  15. S. H. Lee, J. Y. Lim, H. Utsunomiya, K. Euh and S. Z. Han, Kor. J. Met. Mater., 48, 942 (2010) (in Korean). https://doi.org/10.3365/KJMM.2010.48.10.942
  16. S. H. Lee, J. Y. Lim, D. J. Yoon, K. Euh and S. Z. Han, Kor. J. Mater. Res., 21, 15 (2011) (in Korean). https://doi.org/10.3740/MRSK.2011.21.1.015

Cited by

  1. Microstructure and Mechanical Property in Thickness Direction of a Deoxidized Low-Phosphorous Copper Sheet Processed by Two-Pass Differential Speed Rolling vol.23, pp.7, 2013, https://doi.org/10.3740/MRSK.2013.23.7.392
  2. Microstructure and Mechanical Properties of Cu-Ni-Si Alloy Deformed by Differential Speed Rolling vol.26, pp.1, 2016, https://doi.org/10.3740/MRSK.2016.26.1.8