The fracture toughness of hot-pressed NbCr2 alloys doped by rare earth yttrium

被引：25

作者：

Lu, S. Q. ^{[1
,2
]}

Zheng, H. Z. ^{[2
]}

Fu, M. W. ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China

[2] Nanchang Hangkong Univ, Sch Mat Sci & Engn, Nanchang 330063, Peoples R China

来源：

SCRIPTA MATERIALIA | 2009年 / 61卷 / 02期

基金：

中国国家自然科学基金;

关键词：

NbCr2 Laves phase alloy; Rare earth element yttrium; Fracture toughness; Microstructure analysis; LAVES-PHASE ALLOYS; IN-SITU COMPOSITES; MECHANICAL-PROPERTIES; MICROSTRUCTURE; INTERMETALLICS; METALLURGY;

D O I：

10.1016/j.scriptamat.2009.03.049

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

NbCr2 Laves phase alloys doped by rare earth yttrium were fabricated by mechanical alloying and hot pressing. The effect of yttrium addition content on the fracture toughness of these alloys was investigated. The experimental results show that a minor addition of yttrium can refine the microstructure and toughen NbCr2 Laves phase. When the content of yttrium in NbCr2 is about 0.1 wt.%, the fracture toughness value is increased by about 20%, which is 4 times higher than that of the cast alloy (1.2 MPa m(1/2)). (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：205 / 207

页数：3

共 17 条

[1] A CRITICAL-EVALUATION OF INDENTATION TECHNIQUES FOR MEASURING FRACTURE-TOUGHNESS .1. DIRECT CRACK MEASUREMENTS [J].

ANSTIS, GR ;

CHANTIKUL, P ;

LAWN, BR ;

MARSHALL, DB .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1981, 64 (09) :533-538

[2] Alloying effects on fracture mechanisms in Nb-based intermetallic in-situ composites [J].

Chan, KS .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 329 :513-522

[3]

CHAN KS, 1996, JOM, V9, P62

[4]

Chao J, 2007, ACTA MATER, V55, P1599, DOI [10.1016/j.actamat.2006.12.019, DOI 10.1016/J.ACTAMAT.2006.12.019]

[5]

Chen KC, 1994, MATER RES SOC S P, V364, P1401

[6]

CHEN YY, 2008, J ALLOY COMPD, V265, P1

[7] The effect of microstructure on the fracture resistance of Nb-Cr-Ti in situ composites [J].

Davidson, DL ;

Chan, KS .

SCRIPTA MATERIALIA, 1998, 38 (07) :1155-1161

[8] SYNCHROSHEAR TRANSFORMATIONS IN LAVES PHASES [J].

HAZZLEDINE, PM ;

PIROUZ, P .

SCRIPTA METALLURGICA ET MATERIALIA, 1993, 28 (10) :1277-1282

[9] Physical metallurgy and mechanical properties of transition-metal Laves phase alloys [J].

Liu, CT ;

Zhu, JH ;

Brady, MP ;

McKamey, CG ;

Pike, LM .

INTERMETALLICS, 2000, 8 (9-11) :1119-1129

[10] Deformability improvement in C15 NbCr2 intermetallics by addition of ternary elements [J].

Takasugi, T ;

Yoshida, M ;

Hanada, S .

ACTA MATERIALIA, 1996, 44 (02) :669-674

← 1 2 →