The Influence of Microstructural Changes of Superduplex Stainless Steel on the Magnetic Barkhausen Noise

  1. Prof. Dr. P. Neumann3,
  2. Dr. D. Allen4 and
  3. Prof. Dr. E. Teuckhoff5
  1. István Mészáros1,
  2. János Dobránszky2 and
  3. Kwak Dong-Ho1

Published Online: 5 JAN 2006

DOI: 10.1002/3527606181.ch31

Steels and Materials for Power Plants, Volume 7

Steels and Materials for Power Plants, Volume 7

How to Cite

Mészáros, I., Dobránszky, J. and Dong-Ho, K. (2000) The Influence of Microstructural Changes of Superduplex Stainless Steel on the Magnetic Barkhausen Noise, in Steels and Materials for Power Plants, Volume 7 (eds P. Neumann, D. Allen and E. Teuckhoff), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606181.ch31

Editor Information

  1. 3

    Max-Planck-Institut für Eisenforschung, Max-Planck-Str. 1, 40237 Düsseldorf, Germany

  2. 4

    ABB Asltom Power UK Ltd., Cambridge Road, Whetstone, Leicester LE9 GLH, United Kingdom

  3. 5

    Siemens AG, Postfach 3240, 91050 Erlangen, Germany

Author Information

  1. 1

    Techn. Univ. of Budapest, Dept. of Materials Science and Engineering, Hungary

  2. 2

    Research Group for Metals Technology of HAS, Budapest, Hungary

Publication History

  1. Published Online: 5 JAN 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301959

Online ISBN: 9783527606184

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Keywords:

  • steels for power plants;
  • materials for power plant;
  • influence of microstructural changes;
  • superduplex stainless steel;
  • magnetic Barkhausen noise

Summary

Development of duplex stainless steels significantly broadened the application possibilities of stainless steels. The corrosion resistance of duplex stainless steels much better compared to the traditional austenitic steels which is especially important in chloride ion containing surroundings. Moreover, the large yield stress of duplex steels offer significant advantages in structural applications. The so called superduplex stainless steels have the superior corrosion resistance and mechanical properties as well. There is intensive research activity on weldability because the welding and the thermal load naturally, have strong effect on the microstructure [1, 2]. The goal of these research works is to clarify the connections of precipitation processes in δ-ferrite + austenite (γ) structures which happen due to thermal effects [3]. The segregation and precipitation processes are normally divided into two large thermal ranges, these are the 300-600 °C and 600-1000 °C. In the 300-500 °C interval the Ni- and Si-rich G-phase and the Cr- and Mo-rich α'-phases come into being. At about 600 °C the appearance of Mo-rich Laves-phase is typical. These phases are responsible for the embrittlement at 475 °C [4].