Processing and properties of highly porous 17-4 PH stainless steel


Highly porous 17-4 PH stainless steel having porosities in the range of 39–82% with an average pore size of around 700 μm was successfully fabricated using space holder technique in powder metallurgy. Irregular carbamide particles were used as a space holder material. The final porosity was directly related to the added fraction of carbamide. The specimens were sintered at either 1300°C or 1350°C for times of 60 and 90 min in hydrogen atmosphere. In this porosity range, Young’s modulus and compressive strength of the specimens before aging treatment found to be in the range of 0.17–5.34 GPa and 24–290 MPa, respectively and decreased with increasing porosity. 0.5 wt.% boron addition to the 17-4 PH steel powders lowered the sintering temperature and time. The relationship between the mechanical properties and the relative density of porous 17-4 PH steel was found to obey the power law relation.


porous materials powder metallurgy space holder 17-4 PH stainless steel sintering 



This work was supported by Scientific Research Projects Coordination Unit of Istanbul University, Project number T-1430.


  1. 1.
    M. F. Ashby, A. Evans, N. A. Fleck, et al., Metal Foams: A Design Guide, Elsevier Science, Boston, MA (2000).Google Scholar
  2. 2.
    M. Bram, C. Stiller, H. P. Buckramed, et al., “High-porosity titanium, stainless steel, and superalloy parts,” Advanced Engineering Materials, 2, No. 4, 196–199 (2000).CrossRefGoogle Scholar
  3. 3.
    J. Banhart, “Manufacture, characterisation and application of cellular metals and metal foams,” Progress in Materials Science, Vol. 46, No. 6, 559–632 (2001).CrossRefGoogle Scholar
  4. 4.
    H. P. Degisher, B. Kriszt, Handbook of Cellular Metals, Wiley-VCH, Weinheim (2002), p. 313.CrossRefGoogle Scholar
  5. 5.
    W. Niu, C. Bai, G. Qiu, Q. Wang, “Processing and properties of porous titanium using space holder technique,” Materials Science and Engineering A, No. 506, 148–151 (2009).Google Scholar
  6. 6.
    H. I. Bakan, “A Novel water leaching and sintering process for manufacturing highly porous stainless steel,” Scripta Materialia, 55, 203–206 (2006).CrossRefGoogle Scholar
  7. 7.
    A. Laptev, M. Bram, H. P. Buchkremer, D. Stover, “Study of production route for titanium parts combining very high porosity and complex shape,” Powder Metallurgy, 47, 85–92 (2004).CrossRefGoogle Scholar
  8. 8.
    D. C. Dunand, “Adv. Eng. Mater.,” No. 6, 369 (2004).Google Scholar
  9. 9.
    C. E. Wen, M. Mabuchi, Y. Yamada, “Processing of biocompatible porous Ti and Mg,” Scripta Materialia, 45, 1147–1153 (2001).CrossRefGoogle Scholar
  10. 10.
    N. Tuncer, G. Arslan, “Designing compressive properties of titanium foams,” J. Mater Sci., 44, 1477–1484 (2009).CrossRefGoogle Scholar
  11. 11.
    H. O. Gulsoy, R. M. German, “Sintered foams from precipitation hardened stainless steel powder,” Powder Metallurgy, 51, No. 4 (2008).Google Scholar
  12. 12.
    H. O. Gulsoy, S. Salman, S. Ozbek, F. Findik, “Sintering of a Boron-doped injection moulded 17-4 PH stanless steel,” J. Mater Sci., 40, 4101–4104 (2005).CrossRefGoogle Scholar
  13. 13.
    H. I. Bakan, D. Heaney, R. M. German, “Effect of Nickel Boride and Boron additions on sintering characteristics of injection moulded 316L powder using water soluble binder system,” Powder Metallurgy, 44, No. 3, 235–242, (2001).CrossRefGoogle Scholar
  14. 14.
    L. J. Gibson, M. F. Ashby, Cellular Solids–Structures and Properties, University Press, Cambridge (1997).Google Scholar

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© Springer Science+Business Media, Inc. 2011

Authors and Affiliations

  1. 1.Istanbul University, Metallurgical and Materials Engineering DepartmentIstanbulTurkey

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