Fatigue crack growth in compacted and spheroidal graphite cast irons

Hosdez, Jérôme; Limodin, Nathalie; Najjar, Denis; Witz, Jean‐François; Charkaluk, Éric; Osmond, Pierre; Forré, A.; Szmytka, Fabien

doi:10.1016/j.ijfatigue.2019.105319

Cited by 31 publications

(16 citation statements)

References 39 publications

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“…The technique was subsequently used to investigate several localized effects that could not be captured with 2D methods. Among these are the impact of the crack front curvature 64 and the role played by the 3D shape and orientation of the GPs 65 during fatigue crack propagation. With respect to monotonic loading, the effect of the graphite spatial arrangement on the ductile damage mechanisms in presence of complex stress states was deeply investigated, and correlations between the evolution of the volumetric part of the local strain and the dominant failure mechanisms were unraveled 66 .…”

Section: Mechanical Loadingmentioning

confidence: 99%

Recent trends in X‐ray‐based characterization of nodular cast iron

Andriollo

Zhang

et al. 2020

Mat Design & Process Comms

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Through various examples, this short review presents the main X‐ray‐based techniques that are available to characterize nodular cast iron at the microstructural level. Emphasis is placed on the enormous potential offered by the recent developments in X‐ray tomography, X‐ray diffraction, and digital volume correlation, which allow collecting microstructural and micromechanical information in 4D (3D plus time) during both casting and subsequent mechanical loading. The goal is to demonstrate that for nodular cast iron, which has an inherently three‐dimensional, composite microstructure, X‐ray‐based techniques provide some significant advantages over conventional microscopy. For this reason, these techniques can be instrumental in unveiling the mechanisms controlling both the formation of the microstructure as well as its micromechanical behavior during in‐service loading, thus paving the way to the development of improved process–structure–property relations.

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Section: Mechanical Loadingmentioning

confidence: 99%

Recent trends in X‐ray‐based characterization of nodular cast iron

Andriollo

Zhang

et al. 2020

Mat Design & Process Comms

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“…In this respect, experimental evidence shows that the fatigue crack in SGI grows transgranularly by linking the nodules [10,11]. These appear to act as crack attractors [12], leading to a higher graphite fraction on the fracture surface than in the bulk of the material [13]. Also, a crack might or might not propagate depending on the presence of clusters of nodules near its tip [14], which seem to be associated with load shielding effects [15].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the correlation between micro-mechanical fields and fatigue crack propagation path in nodular cast iron

et al. 2020

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“…[2][3][4][5][6][7][8] Cast irons were also tested on thermal fatigue resistance where the influence of graphite particle shape and amount, test temperature, etc., were studied. [9][10][11][12][13][14][15][16][17][18][19][20][21] In the studies of Bombač et al 22 and Terčelj et al, 23 new test rig for thermal fatigue resistance was used where used test samples enable quantification of thermal fatigue resistance. Furthermore, the developed test enables testing at constant prescribed conditions and thus obtaining the reliable results.…”

Section: Introductionmentioning

confidence: 99%

Thermal Fatigue Testing of SiMoCr Compacted Graphite Cast Iron for HPDC Tooling Application

et al. 2020

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SiMoCr CGI (compacted graphite iron) has the potential to be a cost-effective replacement for some hot working tool steel parts like shot sleeve in HPDC (High-Pressure Die Casting) applications. Thermal fatigue testing of SiMoCr CGI cast alloy was performed on Gleeble 1500D machine. Cracks were evaluated on non-nitrided and nitrided samples at test temperatures of 400 and 600°C, after 1000, 2000 and 4000 thermal cycles. Samples were heated to prescribed test temperature and afterward cooled in computer-guided cycles. After the test, all the samples were axially and radially sectioned and cracks on cross sections were evaluated. Length of all cracks which occurred was measured and statistically evaluated, i.e., the average length of cracks and distribution of crack lengths were determined. At nitrided samples, higher values for average crack lengths were obtained while density of cracks was lower in comparison with non-nitrided samples.

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Fatigue crack growth in compacted and spheroidal graphite cast irons

Cited by 31 publications

References 39 publications

Recent trends in X‐ray‐based characterization of nodular cast iron

Recent trends in X‐ray‐based characterization of nodular cast iron

Analysis of the correlation between micro-mechanical fields and fatigue crack propagation path in nodular cast iron

Thermal Fatigue Testing of SiMoCr Compacted Graphite Cast Iron for HPDC Tooling Application

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