The influence of microstructure on the fracture properties of polycrystalline cubic boron nitride

被引：15

作者：

Alveen, P. ^{[1
]}

McNamara, D. ^{[1
]}

Carolan, D. ^{[1
,2
]}

Murphy, N. ^{[1
]}

Ivankovic, A. ^{[1
]}

机构：

[1] Univ Coll Dublin, Sch Mech & Mat Engn, Dublin, Ireland

[2] Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, London SW7 2AZ, England

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2015年 / 109卷

关键词：

PcBN; Microstructure; Fracture; Numerical model; Finite volume analysis; Cohesive zone model; CRACK DEFLECTION PROCESSES; CERAMIC TOOL MATERIALS; ELASTIC-CONSTANTS; COMPOSITES; PROPAGATION; MODEL; TOUGHNESS; FAILURE; STRESS; SIMULATION;

D O I：

10.1016/j.commatsci.2015.06.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of microstructure on the fracture properties of polycrystalline cubic boron nitride (PcBN) for industrial applications has been investigated numerically using the finite volume method. Representative synthetic microstructures have been created using a modified Voronoi tessellation procedure and these have been implemented in a multi-scale model to investigate the effect of individual microstructural parameters on the bulk material toughness. Crack initiation and propagation has been modelled using an arbitrary crack propagation solver using a cell-centred finite volume based method in FOAM-ext-3.0. The results demonstrate that individual microstructural parameters and their properties, such as percentage grains as well as precise traction-separation relationships between the phases, can greatly influence fracture behaviour and their contributions to the overall fracture toughness of PcBN is quantified and discussed. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：115 / 123

页数：9

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