DOI QR코드

DOI QR Code

Effect of Strain Rate on Microstructure Formation Behaviors of AZ80 Magnesium Alloy During High-temperature Deformation

고온변형 중의 AZ80 마그네슘 합금의 미세조직 형성 거동에 미치는 변형속도의 영향

  • Park, Minsoo (Institute of Innovative Research (IIR), Tokyo Institute of Technology) ;
  • Kim, Kwonhoo (Department of Metallurgical Engineering, Pukyong National University)
  • Received : 2020.06.17
  • Accepted : 2020.07.03
  • Published : 2020.07.30

Abstract

The crystallographic texture plays an important role in both the plastic deformation and the macroscopic anisotropy of magnesium alloys. In previous study for AZ80 magnesium alloy, it was found that the main texture components of the textures vary with the deformation conditions at high temperatures. Also, the basal texture was formed at stress of more than 15-20 MPa and the non-basal texture was formed at stress of less than 15-20 MPa. Therefore, in this study, uniaxial compression deformation of AZ80 magnesium alloy was carried out at high temperature (stress of 15-20 MPa). The uniaxial compression deformation is performed at temperature of 723 K and strain rate 3.0 × 10-3s-1, with a strain range of between -0.4 and -1.3. Texture measurement was carried out on the compression planes by the Schulz reflection method using nickel filtered Cu Kα radiation. EBSD measurement was also conducted in order to observe spatial distribution of orientation. As a result of high temperature deformation, the main component of texture and its development vary depending on deformation condition of this study.

Keywords

References

  1. K. Ohtoshi and M. Katsuta : J. JILM 51 (2001) 534538.
  2. B. L. Mordike and T. Ebert : Mater. Sci. Eng. A 302 (2001) 37. https://doi.org/10.1016/S0921-5093(00)01351-4
  3. Q. Jin, S.-Y. Shim and S.-G. Lim : Scr. Mater. 55 (2006) 843. https://doi.org/10.1016/j.scriptamat.2006.05.040
  4. M. Kohzu, K. Kii, Y. Nagata, H. Nishio, K. Higashi and H. Inoue : J. JILM 60 (2010) 237. https://doi.org/10.2464/jilm.60.237
  5. R. E. Reed-Hill : Trans. Metall. Soc. AIME 218 (1960) 554.
  6. J. Kim, K. Okayasu and H. Fukutomi : Mater. Trans., 54 (2013) 192. https://doi.org/10.2320/matertrans.H-M2012832
  7. K. Kim, K. Okayasu and H. Fukutomi : Mater. Trans., 56 (2015) 17. https://doi.org/10.2320/matertrans.L-M2014840
  8. K. Kim, K. Okayasu and H. Fukutomi : Mater. Sci. Forum, 879 (2016) 938. https://doi.org/10.4028/www.scientific.net/MSF.879.938
  9. M. Dahms and H. J. Bunge : J. Appl. Cryst. 22 (1989) 439. https://doi.org/10.1107/S0021889889005261