Numerical analysis of the stresses developed during the sliding of a cylinder over compact graphite iron

Fukumasu, Newton Kiyoshi; Pelegrino, P.L.; Cueva, G.; Souza, R.M.; Sinatora, Amilton

doi:10.1016/j.wear.2005.01.014

Cited by 27 publications

(15 citation statements)

References 10 publications

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“…First of all, an important aspect to point out is the resulting mechanical loads were distributed macroscopically in a circular area with 20 mm of diameter (tool material). However, these mechanical loads in the 2D FEM simulation were adapted in a rectangular tool-workpiece contact area (50x1 µm 2 ), in which 50μm in the x-axis (length) and, 1μm corresponds to the thickness of the microstructure in the simulation. Therefore, the microstructural analysis was limited to a rectangular area of 50 x 35 µm² (length (x-axis) x width (y-axis), see Figure 1a) with plane strain considerations.…”

Section: Experimental and Numerical Proceduresmentioning

confidence: 99%

“…It is worth mentioning, materials for tools have to be wear, thermal and mechanical fatigue resistant [1]. The thermomechanical behavior and, the effect of thermomechanical loads can be conducted by numerical simulation (Finite Element Method -FEM), which enables macro and microanalysis of the material [2]. Therefore, regarding the manufacturing of tools by SPS and the FEM simulation, this work aims: (i-) to manufacture two different samples with different volume fractions of NbC and the S290 tool steel by SPS.…”

Section: Introductionmentioning

confidence: 99%

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Multiscale effect of thermomechanical loads on the NbC-Steel microstructure obtained by SPS

Seriacopi

Tertuliano

Boidi³

et al. 2014

Proceedings of the 13th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials

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The ABAQUS ® commercial software was used to simulate by Finite Element Method (FEM) the stress and the strain fields due to the thermal and mechanical loads applied in the tool microstructure throughout hot forging operations. Therefore, the macroscale (loads applied in the tool) was adapted to the microscale (stress and strain developed in the microstructural features). Materials analyzed in this study, which are prospective to be used as tools, consisted of NbC and tool steel powders, which were mixed, and consolidated by SPS technique (Spark Plasma Sintering). NbC-Steel microstructure was firstly characterized by SEM and, thus it was meshed by OOF2 ® software (NIST). Subsequently, the microstructural characterization allowed to undergo evaluation of different aspects and critical stress and strain regions, which can favored microstructural damage in the tool material.

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Section: Experimental and Numerical Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiscale effect of thermomechanical loads on the NbC-Steel microstructure obtained by SPS

Seriacopi

Tertuliano

Boidi³

et al. 2014

Proceedings of the 13th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials

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“…Thus, the models of the microstructural determination of damage course in the spheroidal cast iron were extended to a discrete approach. The local stress field at the G/M interface around a graphite spheroid embedded into metal matrix was analyzed and recognized as a factor involved in the material damage (Andriollo, Thorborg, Tiedje, & Hattel, ; Bonora & Ruggiero, ; Di Cocco, Iacoviello, Rossi, & Iacoviello, ; Fukumasu, Pelegrino, Cueva, Souza, & Sinatora, ; Zhang et al, ). Furthermore, the obtained results showed that graphite could not be considered as an isotropic phase.…”

Section: Introductionmentioning

confidence: 99%

Microscopic approach to micromechanism of damage in spheroidal cast iron

Warmuzek

Polkowska

Gazda

2020

Microscopy Res & Technique

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In this work, the observations of the fracture surface after standard tensile tests of several kinds of spheroidal cast irons, ferritic and austempered ductile irons, have been carried out by means of scanning electron microscopy. The local crack path in the area of graphite (G)/matrix (M) interface has been analyzed as affected by a matrix phase composition and the austempering treatment parameters. The obtained results allowed identifying some determination factors for debonding mode at the G/M interface and their role in a final damage mechanism. Some microstructural details in the microregions composed of graphite and matrix showed that the G-M debonding mode in the separation area of the G/M interface seems to be controlled by macroscopic properties of the alloy and by the morphology of G/M interface. On the other hand, the internal destruction of graphite nodule has been mainly determined by a structure and anisotropy of graphite crystal lattice. K E Y W O R D S characterization, electron microscopy, fracture behavior, iron alloys

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“…In a different approach, microstructural modelling has been used in the past to study the mechanical response of cast irons: SGI [3,[27][28][29][30][31][32][33], CGI [34][35][36][37][38] and FGI [39]. In addition to the graphite morphology, typical for each cast iron type, other microstructural information has been included in these models:…”

Section: Introductionmentioning

confidence: 99%

Microstructural model for the time‐dependent thermomechanical analysis of cast irons

et al. 2015

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In this paper, a multiscale modelling approach is followed for the modelling of time and temperature dependent behaviour of compacted graphite cast iron (CGI) material. Cast irons are often used in heavy duty machinery parts subjected to elevated temperatures for prolonged periods of time. This, in combination with its complex heterogeneous microstructure, plays the crucial role in determining the life time of the material. In this work a 2D microstructural model of CGI is developed. The geometry is based on the micrographs of the material. The pearlitic matrix is modelled with the temperature dependent elasto‐visco‐plastic model calibrated on the pearlitic steel experiments. The graphite particles are modelled as anisotropic elastic. The results of the simulations of tensile and stress relaxation tests at different temperatures between 20 °C and 500 °C show that the macroscopic mechanical behaviour of the ma‐terial deteriorates rapidly above 350 °C. At the microstructural scale, the anisotropic graphite particles act as stress concentrators promoting the formation of strain percolation paths, that become more critical at higher temperatures. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Numerical analysis of the stresses developed during the sliding of a cylinder over compact graphite iron

Cited by 27 publications

References 10 publications

Multiscale effect of thermomechanical loads on the NbC-Steel microstructure obtained by SPS

Multiscale effect of thermomechanical loads on the NbC-Steel microstructure obtained by SPS

Microscopic approach to micromechanism of damage in spheroidal cast iron

Microstructural model for the time‐dependent thermomechanical analysis of cast irons

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