Ductile cast irons: microstructure influence on fatigue crack propagation resistance

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Microstructure influence on fatigue crack propagation resistance in five different ductile cast irons (DCI) was investigated. Four ferrite/pearlite volume fractions were considered, performing fatigue crack propagation tests according to ASTM E647 standard (R equals to 0.1, 0.5 and 0.75, respectivel...

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Bibliographic Details
Published in:Fracture and Structural Integrity
Main Authors: Mauro Cavallini, Vittorio Di Cocco, Francesco Iacoviello
Format: Article
Language:English
Published: Gruppo Italiano Frattura 2010-07-01
Subjects:
Ductile irons
Microstructure
Fatigue crack propagation
Online Access:http://www.gruppofrattura.it/pdf/rivista/numero13/numero_13_art_1.pdf
Description
Summary:Microstructure influence on fatigue crack propagation resistance in five different ductile cast irons (DCI) was investigated. Four ferrite/pearlite volume fractions were considered, performing fatigue crack propagation tests according to ASTM E647 standard (R equals to 0.1, 0.5 and 0.75, respectively). Results were compared with an austempered DCI. Damaging micromechanisms were investigated according to the following procedures: - “traditional” Scanning Electron Microscope (SEM) fracture surfaces analysis; - SEM fracture surface analysis with 3D quantitative analysis; - SEM longitudinal crack profile analysis - Light Optical Microscope (LOM) transversal crack profile analysis;
ISSN:1971-8993

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