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Compressive properties of lotus-type porous stainless steel

Published online by Cambridge University Press:  01 January 2006

T. Ide ,
M. Tane ,
T. Ikeda ,
S.K. Hyun  and
H. Nakajima
T. Ide
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki 567-0047, Japan
M. Tane*
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki 567-0047, Japan
T. Ikeda
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki 567-0047, Japan
S.K. Hyun
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki 567-0047, Japan
H. Nakajima
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki 567-0047, Japan
*
a)Address all correspondence to this author. e-mail: mtane@sanken.osaka-u.ac.jp
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Abstract

Lotus-type porous stainless steel (SUS304L), possessing cylindrical pores aligned in one direction, was fabricated by means of a continuous zone melting technique undera pressurized hydrogen/helium atmosphere. Compression tests were carried out on the resultant lotus stainless steel not only in the directions parallel and perpendicular tothe elongated-pore direction but also in other directions to reveal its anisotropic compressive behavior. The macroscopic deformation modes depend on porosity and the angle between the elongated-pore direction and compression direction, which is a unique characteristic resulting from its anisotropic porous structure. The yield stress in the pore direction decreases almost linearly with increasing porosity, while that in the perpendicular direction decreases more rapidly. The yield stress in the direction of θ from the elongated-pore direction decreases monotonically with increase in θ. The yield behavior of lotus stainless steel was described using micromechanical mean-field theory.

Keywords

Mechanical propertiesMetalPorosity
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 1 , January 2006 , pp. 185 - 193
Copyright
Copyright © Materials Research Society 2006

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