Elevated temperature compression behaviors of lotus-type porous NiAl

被引：14

作者：

Lee, Ji-Woon ^{[1
]}

Hyun, Soong-Keun ^{[1
]}

Kim, Mok-Soon ^{[1
]}

Kim, Myoung-Gyun ^{[2
]}

Ide, Takuya ^{[3
]}

Nakajima, Hideo ^{[3
]}

机构：

[1] Inha Univ, Div Mat Sci & Engn, Inchon 402751, South Korea

[2] Res Inst Ind Sci & Technol RIST, Mat & Engn Res Inst, Pohang 790330, South Korea

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

来源：

INTERMETALLICS | 2012年 / 29卷

基金：

新加坡国家研究基金会;

关键词：

Nickel aluminides; based on NiAl; Anisotropy; Mechanical properties at high temperatures; Casting; Mechanical testing; MECHANICAL-PROPERTIES; FRACTURE-TOUGHNESS; DUCTILITY; STRENGTH;

D O I：

10.1016/j.intermet.2012.04.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A compression test was conducted on lotus-type porous NiAl to investigate the effect of cylindrical pores on the compression behaviors of the brittle material at elevated temperature. Lotus-type porous NiAl was fabricated by unidirectional solidification in the pressurized hydrogen atmosphere. The deformation strain of porous NiAl was larger than that of nonporous NiAl at 673 K. Both porous and nonporous NiAl showed ductile behavior at 873 K. The cylindrical pores affected the movement of cracks and dislocations in the material, and these contributed to the increased toughness of the brittle material. Anisotropic compression was caused by the difference between aligned directions of cylindrical pores and the inherent anisotropy of the matrix that originates from the crystal structure. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：27 / 34

页数：8

共 29 条

[1]

[Anonymous], PROG MAT SCI

[2]

[Anonymous], MAT SCI ENG A

[3] THE EFFECT OF GRAIN-SIZE ON THE YIELD STRENGTH OF FEAL AND NIAL [J].

BAKER, I ;

NAGPAL, P ;

LIU, F ;

MUNROE, PR .

ACTA METALLURGICA ET MATERIALIA, 1991, 39 (07) :1637-1644

[4] DEFORMATION PROPERTIES AND ELECTRON MICROSCOPY STUDIES OF INTERMETALLIC COMPOUND NIAL [J].

BALL, A ;

SMALLMAN, RE .

ACTA METALLURGICA, 1966, 14 (10) :1349-&

[5] OPERATIVE SLIP SYSTEM AND GENERAL PLASTICITY OF NIAL .2. [J].

BALL, A ;

SMALLMAN, RE .

ACTA METALLURGICA, 1966, 14 (11) :1517-&

[6] Nanocrystalline NiAl-processing, characterization and mechanical properties [J].

Choudry, MS ;

Dollar, M ;

Eastman, JA .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 256 (1-2) :25-33

[7] NIAL ALLOYS FOR HIGH-TEMPERATURE STRUCTURAL APPLICATIONS [J].

DAROLIA, R .

JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 1991, 43 (03) :44-49

[8] Reinforcement by crack-tip blunting in porous ceramics [J].

Deng, ZY ;

She, JH ;

Inagaki, Y ;

Yang, JF ;

Ohji, T ;

Tanaka, Y .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2004, 24 (07) :2055-2059

[9]

Dieter George Ellwood, 1976, Mechanical metallurgy, V3

[10] On the strength and ductility of nanocrystalline materials [J].

Dollár, M ;

Dollár, A .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2004, 157 :491-495

← 1 2 3 →