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

Keywords

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

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Fabrication and mechanical properties of Lotus-type porous carbon steel by unidirectional solidification in nitrogen atmosphere'. Together they form a unique fingerprint.

  • Cite this