Fabrication of lotus-type porous stainless steel by unidirectional solidification under hydrogen atmosphere

被引：36
作者：
Ikeda, T [1 ]
Tsukamoto, M [1 ]
Nakajima, H [1 ]
机构：
[1] Osaka Univ, Inst Sci & Ind Res, Ibaraki 5670047, Japan
来源：
MATERIALS TRANSACTIONS | 2002年 / 43卷 / 11期
关键词：
porous metal; stainless steel; tensile strength;
D O I：
10.2320/matertrans.43.2678
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Lotus-type porous stainless steel SUS304L has been fabricated by unidirectional solidification under mixed gases of hydrogen and argon. The atmospheric pressure dependence of porosity and pore diameter has been investigated. The porosity is lower if the partial pressure of argon is higher under a constant partial pressure of hydrogen and is higher if the partial pressure of hydrogen is higher under a constant total pressure of atmosphere composing of hydrogen and argon. Average pore diameter increases with increasing distance from the bottom chill plane. From tensile tests, the ultimate tensile strength of the porous stainless steel with porosity about 50% has been found to be about 7 times lower than nonporous alloy in the direction perpendicular to pore growth direction.
引用
收藏
页码：2678 / 2684
页数：7
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