Published April 2007 | Version v1
Journal article Metadata-only

Interaction of cracks with precipitates and grain boundaries: Understanding crack growth mechanisms through focused ion beam tomography

Creators

  • 1. Functional Materials, Saarland University, Building C 6.3, D-66041 Saarbruecken (Germany)
  • 2. Materials Science and Methods, Saarland University, Building D 2.3, D-66041 Saarbruecken (Germany)

Description

Focused ion beam tomography is a new powerful tool to investigate the three-dimensional (3-D) spreading of microcracks. In this study, the interaction between a fatigue microcrack with a grain boundary decorated by carbide precipitates in a directionally solidified Ni base alloy is investigated. The carbide precipitates strongly influence crack growth by initiating geometrically necessary steps in the crack plane. 3-D reconstruction shows that the sub-surface orientation of grain boundaries is an important factor for interpreting crack growth rate at the surface

Additional details

Identifiers

DOI
10.1016/j.scriptamat.2006.12.025;
PII
S1359-6462(07)00012-7;

Publishing Information

Journal Title
Scripta Materialia
Journal Volume
56
Journal Issue
8
Journal Page Range
p. 697-700
ISSN
1359-6462
CODEN
SCMAF7

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
39039480
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CARBIDES; CRACK PROPAGATION; CRACKS; FATIGUE; GRAIN BOUNDARIES; INTERACTIONS; ION BEAMS; MICROSCOPY; NICKEL BASE ALLOYS; PRECIPITATION; SURFACES; TOMOGRAPHY
Descriptors DEC
ALLOYS; BEAMS; CARBON COMPOUNDS; DIAGNOSTIC TECHNIQUES; MECHANICAL PROPERTIES; MICROSTRUCTURE; NICKEL ALLOYS; SEPARATION PROCESSES; TRANSITION ELEMENT ALLOYS

Optional Information

Copyright
Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.