Fabrication of lotus-type porous carbon steel via continuous zone melting and its mechanical properties

M. Kashihara, H. Yonetani, T. Kobi, S. K. Hyun, Shinsuke Suzuki, H. Nakajima

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Lotus-type porous carbon steel (lotus carbon steel) AISI1018 rods with long cylindrical pores aligned in one direction were fabricated using the continuous zone melting technique under nitrogen gas pressure of 2.5 MPa. The porosity decreased with increasing transference velocities of 40-160 μm s-1. Tensile tests of the fabricated lotus-type carbon steel rods were performed. The elongation of lotus carbon steel increased after normalizing at 1200 K. The tensile strength and the Young's modulus decreased with increasing porosity. In contrast, the yield strength of lotus carbon steel did not decrease, even with a porosity of 20%, compared with that of non-porous carbon steel. This superior characteristic is attributed to solid-solution strengthening by solute nitrogen.

Original languageEnglish
Pages (from-to)112-118
Number of pages7
JournalMaterials Science and Engineering A
Volume524
Issue number1-2
DOIs
Publication statusPublished - 2009 Oct 25
Externally publishedYes

Fingerprint

Zone melting
zone melting
carbon steels
Carbon steel
mechanical properties
Fabrication
Mechanical properties
fabrication
porosity
Porosity
Nitrogen
rods
nitrogen
normalizing
yield strength
tensile tests
tensile strength
elongation
gas pressure
Yield stress

Keywords

  • Continuous zone melting
  • Lotus-type porous carbon steel
  • Nitrogen
  • Porosity
  • Porous metals
  • Solid-solution hardening
  • Tensile strength
  • Yield strength
  • Young's modulus

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Fabrication of lotus-type porous carbon steel via continuous zone melting and its mechanical properties. / Kashihara, M.; Yonetani, H.; Kobi, T.; Hyun, S. K.; Suzuki, Shinsuke; Nakajima, H.

In: Materials Science and Engineering A, Vol. 524, No. 1-2, 25.10.2009, p. 112-118.

Research output: Contribution to journalArticle

Kashihara, M. ; Yonetani, H. ; Kobi, T. ; Hyun, S. K. ; Suzuki, Shinsuke ; Nakajima, H. / Fabrication of lotus-type porous carbon steel via continuous zone melting and its mechanical properties. In: Materials Science and Engineering A. 2009 ; Vol. 524, No. 1-2. pp. 112-118.
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