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

被引：12

作者：

Kashihara, M. ^{[1
]}

Yonetani, H. ^{[1
]}

Kobi, T. ^{[1
]}

Hyun, S. K. ^{[2
]}

Suzuki, S. ^{[2
]}

Nakajima, H. ^{[2
]}

机构：

[1] Mori Seiki Co Ltd, Iga, Mie 5191414, Japan

[2] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 524卷 / 1-2期

关键词：

Lotus-type porous carbon steel; Nitrogen; Porous metals; Porosity; Continuous zone melting; Tensile strength; Yield strength; Young's modulus; Solid-solution hardening; UNIDIRECTIONAL SOLIDIFICATION; NITROGEN ATMOSPHERE; STAINLESS-STEEL; IRON; CAPACITY;

D O I：

10.1016/j.msea.2009.06.009

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 mu m 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. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：112 / 118

页数：7

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