Investigation of failure mechanisms in WC-Co coated materials

被引：18

作者：

Dalmas, D ^{[1
]}

Benmedhakène, S ^{[1
]}

Kébir, H ^{[1
]}

Richard, C ^{[1
]}

Laksimi, A ^{[1
]}

Roleandt, JM ^{[1
]}

机构：

[1] Univ Technol Compiegne, Lab Mecan Roberval, CNRS, UMR 6066, F-60205 Compiegne, France

来源：

SURFACE & COATINGS TECHNOLOGY | 2003年 / 173卷 / 2-3期

关键词：

acoustic emission; scanning electron microscopy; four points bending test; failure mechanisms; high velocity oxy-fuel; WC-Co coated materials;

D O I：

10.1016/S0257-8972(03)00464-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

WC-Co coated materials are increasingly used in aeronautical applications. The objective of the present study was to develop and validate a method for the characterisation of damage in coated material using a technique involving simultaneous use of both acoustic emission (AE) and scanning electron microscopy observations. Four point bending tests in association with in situ AE were conducted on WC-Co coated specimens prepared with high velocity oxy-fuel technology. Observation of the samples under a microscope shows two types of cracks: transverse cracks, which are regularly spaced on the surface of the coating and interfacial cracks. AE results for these tests were also investigated in terms of amplitude, hits, absolute energy and position of the event. These results show two different types of acoustic event in terms of absolute energy and amplitude. A transverse cracking model within a coating is then presented. This model is obtained by use of the integral equation method. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：130 / 143

页数：14

共 28 条

[1] MEASUREMENT OF THE ULTIMATE SHEAR-STRENGTH OF A METAL CERAMIC INTERFACE [J].

AGRAWAL, DC ;

RAJ, R .

ACTA METALLURGICA, 1989, 37 (04) :1265-1270

[2] Characterization of cracking within thermal spray deposits by an acoustic emission method - Extended abstract [J].

Berndt, CC ;

Lin, CK ;

Leigh, SH .

JOURNAL OF THERMAL SPRAY TECHNOLOGY, 1998, 7 (03) :334-336

[3]

CHOULIER D, 1988, 1 PLASM TECHN S LUC, V2, P293

[4] Characterization of adherence and cracking within coated materials by an acoustic emission method:: application to a WC-Co coating on a steel substrate [J].

Dalmas, D ;

Benmedakhene, S ;

Richard, C ;

Laksimi, A ;

Béranger, G ;

Grégoire, T .

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE C-CHIMIE, 2001, 4 (05) :345-350

[5]

DALMAS D, 2000, P SMT14, P57

[6]

HENDRICKS RC, 1981, 81743 NASA

[7]

JEANDIN M, 2000, HDR SOUTENUE ECOLE C

[8]

KEBIR H, 1998, THESIS U TECHNOLOGIE

[9] Influence of plasma spray parameters on mechanical properties of yttria stabilized zirconia coatings. II: Acoustic emission response [J].

Kucuk, A ;

Berndt, CC ;

Senturk, U ;

Lima, RS .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 284 (1-2) :41-50

[10] Influence of plasma spray parameters on mechanical properties of yttria stabilized zirconia coatings. I: Four point bend test [J].

Kucuk, A ;

Berndt, CC ;

Senturk, U ;

Lima, RS ;

Lima, CRC .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 284 (1-2) :29-40

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