Fabrication and mechanical properties of Lotus-type porous carbon steel by unidirectional solidification in nitrogen atmosphere

Makoto Kashihara, Hirosi Yonetani, Takahiro Kobi, Soong Keun Hyun, Shinsuke Suzuki, Hideo Nakajima

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Lotus-type porous carbon steel (AISI 1018) whose long cylindrical pores are aligned in one direction was fabricated by unidirectional solidification in pressurized nitrogen gas. The ingots with the porosity from 10 to 30% were fabricated under the nitrogen gas pressure of 2.5 MPa at various transference velocities from 40 to 160 ,μm s-1. Tensile strength was measured for Lotus-type porous carbon steel. Elongation was improved due to normalizing at 1200K. The yield strength does not change even in lotus steel less than 20% in porosity. This superior property is attributed to nitrogen solid solution hardening and pore existence.

Original languageEnglish
Pages (from-to)30-34
Number of pages5
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume94
Issue number1
DOIs
Publication statusPublished - 2008
Externally publishedYes

Fingerprint

carbon steels
solidification
Carbon steel
Solidification
Nitrogen
mechanical properties
porosity
nitrogen
Fabrication
atmospheres
Mechanical properties
fabrication
Porosity
Gases
Steel
Ingots
normalizing
Yield stress
Hardening
Elongation

Keywords

  • Lotus-type porous carbon steel
  • Nitrogen
  • Porosity
  • Porous metals
  • Tensile test
  • Unidirectional solidification

ASJC Scopus subject areas

  • Materials Chemistry
  • Metals and Alloys
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Fabrication and mechanical properties of Lotus-type porous carbon steel by unidirectional solidification in nitrogen atmosphere. / Kashihara, Makoto; Yonetani, Hirosi; Kobi, Takahiro; Hyun, Soong Keun; Suzuki, Shinsuke; Nakajima, Hideo.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 94, No. 1, 2008, p. 30-34.

Research output: Contribution to journalArticle

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