Thermal fracture behavior of metal/ceramic functionally graded materials

Kawasaki, Akira; Watanabe, Ryuzo

doi:10.1016/s0013-7944(02)00054-1

Cited by 190 publications

(76 citation statements)

References 17 publications

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“…Layers with specific heat parameters can be obtained with this method, e.g. thermally insulating TBC coatings [2,47,59,60] and other coatings, e.g. biocompatible ones (hydroxyapatite).…”

Section: General Concept Of Sintered Gradient Materialsmentioning

confidence: 99%

“…Gradient materials are broadly used for producing parts where, in the conditions of use, a high temperature gradient exists, in particular in the space and aviation industry [1,21,23,37]. They are used for producing heat barriers, shell plating or rocket engine parts most often [1,43,59]. Gradient materials can be used in a combustion chamber of jet turbine engines where very aggressive conditions prevail for the materials used.…”

Section: General Concept Of Sintered Gradient Materialsmentioning

confidence: 99%

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Fabrication, Structure, Properties and Application of Gradient Sintered Carbide-Steels with HS6-5-2 Matrix

Dobrzański¹,

Kloc-Ptaszna²

2017

Powder Metallurgy - Fundamentals and Case Studies

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This chapter presents essential information concerning sintered tool materials containing carbides, i.e. high-speed steels and metal matrix composites, including sintered carbides and carbide steels. Gradient materials, whose properties change gradually according to their volume, are characterised. The results of investigations are presented in the final part into the structure and properties of newly developed sintered graded tool materials fabricated by the conventional metallurgy method from a mixture of high-speed HS6-5-2 steel powder and WC carbides. Investigations are described for four-layer materials, where the successive transition layers with a smaller and smaller volume fraction of tungsten carbide were constituted from the surface layer side, until a substrate layer containing high-speed HS6-5-2 steel only. The outcomes are described of structural examinations in a scanning and transmission electron microscope, an X-ray microanalysis and the results of density, porosity and hardness examinations of sintered gradient materials and the results of structure and hardness examinations of heat-treated materials.

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“…Layers with specific heat parameters can be obtained with this method, e.g. thermally insulating TBC coatings [2,47,59,60] and other coatings, e.g. biocompatible ones (hydroxyapatite).…”

Section: General Concept Of Sintered Gradient Materialsmentioning

confidence: 99%

Section: General Concept Of Sintered Gradient Materialsmentioning

confidence: 99%

Fabrication, Structure, Properties and Application of Gradient Sintered Carbide-Steels with HS6-5-2 Matrix

Dobrzański¹,

Kloc-Ptaszna²

2017

Powder Metallurgy - Fundamentals and Case Studies

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“…One of typical FGMs are functionally graded metal/ceramic composites which offer optimal thermomechanical characteristics, also they allow one to avoid interfacial delamination usual for layered compositions of a ceramic coating and a metal substrate [2]. The behaviour of FGMs including heat transfer problems and thermal stress analyses in metal/ceramic FGMs have been extensively studied in the past decade, e.g.…”

Section: Introductionmentioning

confidence: 99%

Modelling functionally graded materials in heat transfer and thermal stress analysis by means of graded finite elements

Burlayenko

Altenbach

Sadowski

et al. 2017

Applied Mathematical Modelling

106

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For better understanding of the behavior of functionally graded materials (FGM) in high temperature environment, a reliable and efficient numerical tool is required for predictions of heat transfer behavior and thermally-induced stresses in them. This study presents a finite element formulation of a coupled thermo-mechanical problem in functionally graded metal/ceramic plates. The theoretical framework considers the finite element method (FEM) which is applied to the development of a functionally graded two-dimensional plane strain finite element. The plane strain graded finite element is incorporated within the ABAQUS tm code via the combination of user-defined subroutines. The subroutines enable us to program graded mechanical and thermal properties of the FGM as continuous position-dependent functions and, then, to sample them directly at the Gauss integration points of the element. The performance of the developed graded finite element is verified by comparisons with results known in the literature and with calculated using conventional homogeneous elements in a layered model. The solutions of thermomechanical problems of functionally graded plates referring to pure mechanical and thermal tasks, and uncoupled and coupled analyses of thermoelasticity are carried out and discussed in the paper. Highlights• A finite element formulation of the coupled thermo-mechanical problem of a FGM plate is presented.• A graded plain strain element is incorporated within the ABAQUS code environment.• The performance of the graded element is validated by solving thermo-mechanical problems.• The examples reveal a high accuracy and efficiency of the developed graded finite element. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 *Highlights AbstractFor better understanding of the behavior of functionally graded materials (FGM) in high temperature environment, a reliable and efficient numerical tool is required for predictions of heat transfer behavior and thermally-induced stresses in them. This study presents a finite element formulation of a coupled thermo-mechanical problem in functionally graded metal/ceramic plates. The theoretical framework considers the finite element method (FEM) which is applied to the development of a functionally graded two-dimensional plane strain finite element. The plane strain graded finite element is incorporated within the ABAQUS tm code via the combination of user-defined subroutines. The subroutines enable us to program graded mechanical and thermal properties of the FGM as continuous position-dependent functions and, then, to sample them directly at the Gauss integration points of the element. The performance of the developed graded finite element is verified by comparisons with results known in the literature and with calculated using conventional homogeneous elements in a layered mode...

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“…However, cracks can initiate from initial defects or microcracks appear during manufacturing or service. Experimental results [4] showed that when functionally graded plates are subjected to thermal shock, multiple cracks often occur on the ceramic surface during cooling-heating cycles. This fracture process begins from formation of a single crack from initial defects and then a system of edge cracks is formed.…”

Section: Introductionmentioning

confidence: 99%

Theoretical modeling and analysis of thermal fracture of semi-infinite functionally graded materials with edge cracks

Petrova

Sadowski

2014

Meccanica

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The present investigation is devoted to a problem of the interaction of two edge cracks inclined arbitrary to the boundary of a non-homogeneous halfplane, which is a functionally graded layer on a homogeneous substrate. The functionally graded properties vary exponentially in thickness direction. One cycle of cooling from sintering temperature is considered. An approach based on integral equations is used and a solution is obtained, then the stress intensity factors are calculated and direction of the initial crack propagation is evaluated by using the maximum circumferential stress criterion. Influence of geometrical and material (inhomogeneity) parameters on the fracture characteristics is investigated. This study can serve as a part of the modeling of the fracture process in FGM coatings under cyclic heating-cooling thermal loading.

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Thermal fracture behavior of metal/ceramic functionally graded materials

Cited by 190 publications

References 17 publications

Fabrication, Structure, Properties and Application of Gradient Sintered Carbide-Steels with HS6-5-2 Matrix

Fabrication, Structure, Properties and Application of Gradient Sintered Carbide-Steels with HS6-5-2 Matrix

Modelling functionally graded materials in heat transfer and thermal stress analysis by means of graded finite elements

Theoretical modeling and analysis of thermal fracture of semi-infinite functionally graded materials with edge cracks

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