Materials Transactions Online

Materials Transactions, Vol.46 No.12 (2005) pp.3089-3091
© 2005 The Japan Institute of Metals

Correlation of Magnetic Barkhausen Emission Profile with Strength of Thermally Degraded 2.25Chromium--1Molybdenum Steel

Jai Won Byeon1, Sook In Kwun2, Soon-Jik Hong1, Chul-Ku Lee1, Kae-Myung Kang3 and Yongho Sohn1

1Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, Florida, 32826, USA
2Department of Materials Science and Engineering, Korea University, Seoul, 136-701, Korea
3Department of Materials Science and Engineering, Seoul National University of Technology, Seoul, 139-743, Korea

A non-destructive magnetic Barkhausen emission (MBE) technique was applied to assess thermal degradation of 2.25Cr--1Mo steel, exposed to 630°C for up to 4800 h. The peak position and the peak amplitude in MBE profile decreased and increased, respectively, as a linear function of cube root of isothermal degradation time. These changes in MBE profile were related to the carbides coarsening during thermal exposure. An empirical correlation between the ultimate tensile strength (UTS) and the peak position in the MBE profile was also obtained by a linear regression analysis.

(Received 2005/8/22; Accepted 2005/10/21; Published 2005/12/15)

Keywords: magnetic Barkhausen emission, thermal degradation, nondestructive evaluation, 2.25chromium--1molybdenum steel

PDF(Free)PDF (Free) Table of ContentsTable of Contents

REFERENCES

  1. J. W. Byeon and S. I. Kwun: Mater. Trans. 44 (2003) 1204--1208.
  2. J. W. Byeon: Ph. D. Thesis, Korea University, Korea (2001).
  3. Y. Watanabe and T. Shoji: Metall. Trans. 22A (1991) 2097--2106.
  4. J. W. Byeon and S. I. Kwun: Mater. Lett. 58 (2004) 94--98.
  5. A. M. Adbel-Latif, J. M. Corbett and D. M. R. Taplin: Met. Sci. 16 (1982) 90--96.
  6. J. W. Byeon, C. S. Kim and S. I. Kwun: Physica Status Solidi B 241 (2004) 1756--1760.
  7. S. Yamaura, Y. Furuya and T. Watanabe: Acta Mater. 49 (2001) 3019--3027.
  8. N. Nakai, Y. Furuya and M. Obata: Mater. Trans., JIM 30 (1989) 197--199.
  9. H. Sakamoto, M. Okada and M. Homma: IEEE Trans. Mag. 23 (1987) 2236--2238.
  10. J. K. Yi, B. W. Lee and H. C. Kim: J. Magn. Magn. Mater. 130 (1994) 81--91.
  11. V. Moorthy, B. A. Shaw and J. T. Evans: NDT & E Int. 36 (2003) 43--49.
  12. M. J. Sablik and B. Augustyniak: J. Appl. Phys. 79 (1996) 963--972.
  13. B. D. Cullity: Introduction to Magnetic Materials, 2nd ed., (Addison-Wesley, New York, USA, 1972) pp.~119--120.
  14. K. M. Vedula and R. W. Heckel: Metall. Trans. 1 (1970) 9--18.
  15. D. Jiles: J. Phys. D 21 (1988) 1186--1195.

[JIM HOME] [JOURNAL ARCHIVES]

© 2002 The Japan Institute of Metals
Comments to us : editjt@jim.or.jp