Journal ArticleDOI
Graphite nodules and fatigue crack propagation micromechanisms in a ferritic ductile cast iron
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TLDR
In this article, a ferritic ductile cast irons (DCI) was investigated focusing on fatigue crack propagation micromechanisms: step-by-step fatigue cracks were performed considering compact-type specimens, and crack propagation was investigated by means of scanning electron microscope and digital microscope lateral surfaces observations, considering different loading conditions.Abstract:
Since 1948, ductile cast irons (DCIs) are able to combine the toughness of steels with the good castability of grey irons. They are widely used in a number of applications, for example wheels, gears, and crankshafts in cars and trucks. Their fatigue crack propagation resistance depends on loading conditions, chemical composition, matrix microstructure and graphite elements morphology (graphite volume fraction, graphite elements nodularity, graphite elements distribution and dimensions).
In this work, a ferritic DCI was investigated focusing fatigue crack propagation micromechanisms: step by step fatigue crack propagation tests were performed considering compact-type specimens, and crack propagation micromechanisms were investigated by means of scanning electron microscope and digital microscope lateral surfaces observations, considering different loading conditions. Furthermore, overloads were also considered during fatigue crack propagation, investigating their influence on DCI fatigue crack propagation micromechanisms.read more
Citations
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Journal ArticleDOI
Macro and microscopical approach to the damaging micromechanisms analysis in a ferritic ductile cast iron
TL;DR: In this paper, the influence of the graphite nodules morphology on ductile cast irons (DCIs) mechanical properties is experimentally confirmed both in static, quasi static and cyclic loading conditions.
Journal ArticleDOI
Extraction of stress intensity factors for 3D small fatigue cracks using digital volume correlation and X-ray tomography
TL;DR: In this paper, the authors describe a methodology used to compute stress intensity factor values along the curved front of a fatigue crack inside a nodular cast iron, where an artificial defect is introduced at the surface of a small sample.
Journal ArticleDOI
Microstructural strain distribution in ductile iron; comparison between finite element simulation and digital image correlation measurements
TL;DR: In this article, the effect of microstructure on localised deformation of ductile iron was investigated using in-situ tension testing, digital image correlation (DIC) and in situ tension testing.
Journal ArticleDOI
Influence of the graphite elements morphology on the fatigue crack propagation mechanisms in a ferritic ductile cast iron
TL;DR: In this paper, a ferritic DCI with degenerated nodules was obtained and the fatigue crack propagation resistance was investigated by means of fatigue-cracking propagation tests and compared with the behaviour of a commercial DCI.
Journal ArticleDOI
On the isotropic elastic constants of graphite nodules in ductile cast iron: Analytical and numerical micromechanical investigations
TL;DR: In this article, the elastic properties of graphite nodules in ductile iron are investigated by means of both analytical and numerical techniques, and it is shown that if the nodule internal structure is considered, the traditional isotropy assumption leads to the definition of a domain of admissible values for the effective elastic constants.
References
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Book
Properties and selection : irons, steels, and high-performance alloys
Joseph R. Davis,Lois A. Abel +1 more
TL;DR: A comprehensive guide to compositions, properties, performance, and selection of cast irons, carbon and low-alloy steels, tool steels and stainless steels is presented in this article.
Journal ArticleDOI
Nanoindentation analysis as a two-dimensional tool for mapping the mechanical properties of complex surfaces
TL;DR: In this article, the authors focus on new developments in the way that nanoindentation can be used as a two-dimensional mapping tool for examining the properties of constituent phases independently of each other.
Journal ArticleDOI
Ductile Iron: Fifty Years of Continuous Development
C. Labrecque,M. Gagné +1 more
TL;DR: The state-of-the-art of Ductile Iron technology is reviewed in this paper, where it is shown that although considered as a mature technology, recent process and product developments open new avenues to this family of materials.
Journal Article
Nanoindentation analysis as a two-dimensional tool for mapping the mechanical properties of complex surfaces
TL;DR: In this article, the authors focus on new developments in the way that nanoindentation can be used as a two-dimensional mapping tool for examining the properties of constituent phases independently of each other.
Journal ArticleDOI
Fatigue life distribution and size effect in ductile cast iron for wind turbine components
M. Shirani,Gunnar Härkegård +1 more
TL;DR: In this article, the experimental determination and statistical analysis of high cycle fatigue properties of EN-GJS-400-18-LT ductile cast iron was performed at room temperature.