Metallurgical and Materials Transactions A

, Volume 26, Issue 7, pp 1869–1876 | Cite as

Magnetic properties of maraging steels in relation to nickel concentration

  • M. Ahmed
  • K. Hasnain
  • I. Nasim
  • H. Ayub
Electronic, Magnetic, and Optical Material
Received:

Abstract

Magnetic properties of maraging steels have been investigated as a function of nickel concentration. The alloys nickel content varied from 12 to 24 wt pct, while other alloying constituents were kept at a level maintained in the 18Ni-2400 MPA-grade maraging steel. The magnetic properties were determined following aging for 1 hour in the temperature range of 450 °C to 750 °C. In every alloy investigated, the coercive field increased with aging temper-ature, reaching a maximum around 670 °C ± 30 °C. The saturation magnetization values were lowest around temperatures where maximum coercive field was observed. The coercive field increased from ∼55 to ∼ 175 Oe (∼4380 to ∼ 13,900 amp/meter) and the corresponding sat-uration magnetization decreased from ∼18,500 to ∼ 4000 G (∼1.85 to ∼0.4 T) in the alloys containing 12 and 24 wt pct Ni, respectively. The reverted austenite increased from 25 vol pct at 12 wt pct Ni to 100 vol pct at 24 wt pct Ni. The hardness and Charpy impact strength of the alloys have also been determined. An attempt has been made to correlate magnetic properties with different phase transformations occurring in maraging steels.

Keywords

Austenite Martensite Material Transaction Saturation Magnetization Cold Rolling 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

  1. 1.
    R.F. Decker and S. Floreen:Recent Developments and Applications, Richard K. Wilson ed, TMS, Warrandale, PA, 1988, pp. 1–38.Google Scholar
  2. 2.
    S. Floreen:Metall. Rev., 1968, vol. 13, pp. 115–28.Google Scholar
  3. 3.
    R.F. Decker, J.T. Eash, and A.J. Goldman:Source Book on Maraging Steel1, ASM, Metals Park, OH, 1979, pp. 1–19.Google Scholar
  4. 4.
    A. Magnee, J.M. Dropier, J. Dumont, D. Cousourdis, and L. Habraken:A Critical Review of the Physical Metallurgy of Co Containing High Strength Steel and a Survey of Their Processing, Properties and Uses, Center D’Information Du Cobalt, Brussels, 1974, pp. 50–123.Google Scholar
  5. 5.
    W. Sha, A. Cerezo, and G.D.W. Smith:Metall. Trans. A, 1993, vol. 24A, pp. 1221–132.Google Scholar
  6. 6.
    M. Ahmed, A. Ali, S.K. Hasnain, F.H. Hashmi, and A.Q. Khan:International Meeting on Advanced Materials, Proc. of MRS, Tokyo, vol. 11, pp. 9.Google Scholar
  7. 7.
    M. Ahmed, A. Ali, S.K. Hasnain, F.H. Hashmi, and A.Q. Khan:Acta. Metall. Mater., 1994, vol. 42, pp. 631–38.CrossRefGoogle Scholar
  8. 8.
    M. Ahmed, I. Nasim, I. Salam, S.W. Husain, F.H. Hashmi, and A.Q. Khan:J. Mater. Eng. Performance, 1994, vol. 3 (3), pp. 386–92.CrossRefGoogle Scholar
  9. 9.
    B.L. Averbach and M. Cohen:Trans. Am. Inst. Min. Eng., 1948, vol. 176, p. 401.Google Scholar
  10. 10.
    A. Ali, M. Ahmed, F.H. Hashmi, and A.Q. Khan:Mater. Sci. Technol., 1994, vol. 10, pp. 97–101.Google Scholar
  11. 11.
    F.H. Habiby, A. Haq, and A.Q. Khan:Mater. Des., vol. 13 (n), pp. 259–64.Google Scholar

Copyright information

© The Minerals, Metals & Material Society 1995

Authors and Affiliations

  • M. Ahmed
    • 1
  • K. Hasnain
    • 2
  • I. Nasim
    • 1
  • H. Ayub
    • 1
  1. 1.Dr. A.Q. Khan Research LaboratoriesRawalpindiPakistan
  2. 2.Quaid-i-Azam UniversityIslamabadPakistan

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