Yield and fracture loci for a ductile cast iron EN-GJS-600-3 under biaxial stresses

Biaxial (axial and torsional loading) static tests were performed for the first time on EN-GJS-600–3 ductile cast iron tubular specimens obtained reproducing the solidification conditions typical of thick-walled castings. The experimental results were elaborated to determine the yield and fracture loci of the material, which exhibited significant deviations from those predicted by the Von Mises and Mohr-Coulomb criteria usually adopted for steels and grey cast iron, respectively. For this purpose, several alternative criteria proposed in the technical literature, some of them specifically devised for composite materials, have been calibrated and compared to account for the peculiar mechanical properties of this natural composite material.

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Structure Distribution in Precise Cast Iron Moulded on Meltable Model

Archives of Foundry Engineering ◽

10.1515/afe-2015-0082 ◽

2015 ◽

Vol 15 (4) ◽

pp. 69-74 ◽

Cited By ~ 1

Author(s):

B. Skrbek ◽

K. Policar

Keyword(s):

Quality Improvement ◽

Cast Iron ◽

Ductile Cast Iron ◽

Spheroidal Graphite ◽

Flake Graphite ◽

Cast Irons ◽

Remanent Magnetism ◽

Measurement Results ◽

Mechanical And Physical Properties ◽

Grey Cast

Abstract Topic of this work is to compare metalurgy of cast irons poured into sand moulds and into shell molds at IEG Jihlava company and from it following differencies in structures of thin- and thick-walled castings. This work is dealing with investigation and experimental measurement on surfaces and sections suitable thin- and thick-walled investment castings at IEG Jihlava. Cast irons with flake graphite (grey cast iron) and cast irons with spheroidal graphite (ductile cast iron). Both mechanical and physical properties are determined using calculations from as measured values of wall thicknesses L and Lu, Vickers hardness and remanent magnetism. Measurement results are discussed, findings are formulated and methods for castings metallurgical quality improvement are recommended finally.

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Evaluation of Corrosion Behavior of Different Grades of Cast Iron Insodium Chloride Solutions

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.835.223 ◽

2020 ◽

Vol 835 ◽

pp. 223-228

Author(s):

Adel Nofal ◽

Amal S.I. Ahmed ◽

Wafaa A. Ghanem ◽

W.A. Hussein ◽

Nanis K. Mohamed

Keyword(s):

Cast Iron ◽

Corrosion Behavior ◽

Electrochemical Impedance ◽

Open Circuit ◽

Ductile Cast Iron ◽

X Ray ◽

Grey Cast ◽

Nickel Addition ◽

Eis Measurements ◽

Circuit Technique

In this work, the corrosion behavior of different grades of cast iron in 3.5% and 5% of NaClsolution was evaluated. The samples used in this work are; Grey cast iron (GI), ductile cast iron(DI), austempered ductile cast iron (ADI), intercritically austempered cast iron (IADI) and Ni-Resist cast iron. The study was carried out using the Open- Circuit technique (OPC),Potentiodynamic polarization (PP), and electrochemical impedance spectroscopy (EIS)measurements and complemented by Scanning electron microscopy (SEM) and Energydispersive X-ray analysis (EDAX). The results obtained showed that the austempering heattreatment and nickel addition improves the corrosion resistance of cast iron. The order ofcorrosion resistance in NaCl solution is as follows: Ni-Resist > ADI > IADI > DI > GI.

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Yield Surface for Grey Cast Iron Under Biaxial Stress

Journal of Engineering Materials and Technology ◽

10.1115/1.2904265 ◽

1994 ◽

Vol 116 (2) ◽

pp. 148-154 ◽

Cited By ~ 30

Author(s):

H. E. Hjelm

Keyword(s):

Cast Iron ◽

Plane Stress ◽

Yield Surface ◽

Yield Curve ◽

Yield Function ◽

Grey Cast Iron ◽

Biaxial Stress ◽

Hardening Modulus ◽

Grey Cast ◽

Von Mises

Biaxial plane stress experiments have been performed on cruciform specimens made of graphite grey cast iron. Different ratios of tensile and compressive loads were applied in two perpendicular directions. The primary objective of this investigation is to determine the locus of the yield surface (yield curve) under plane stress, and to establish yield functions that could model the elastoplastic behavior of grey cast iron with reasonably good accuracy. The experiments show that a sufficiently accurate description is obtained by using the ordinary von Mises yield function in the compressive-compressive region, and elsewhere, the von Mises yield function modified with a term containing the first stress invariant. It was also found that for tensile loadings nonelastic deformations develop at low stress levels. Use of the above yield function must therefore be accompanied by a very large hardening modulus for tensile loads.

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CHARACTERISTIC INTERNAL FRICTION SPECTRUM OF GREY CAST IRON

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19815143 ◽

1981 ◽

Vol 42 (C5) ◽

pp. C5-929-C5-934 ◽

Cited By ~ 2

Author(s):

P. Millet ◽

R. Schaller ◽

W. Benoit

Keyword(s):

Cast Iron ◽

Internal Friction ◽

Grey Cast Iron ◽

Grey Cast ◽

Internal Friction Spectrum

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ON THE PROCESSING OF HEMATITE RAW MATERIALS AT THE KRYVOROZHSK MINING AND PROCESSING PLANT OF OXIDIZED ORE ON TECHNOLOGY OF DIRECT RECOVERY ITmk3

Metallurgicheskaya i gornorudnaya promyshlennost ◽

10.33101/s005-59768574 ◽

2018 ◽

pp. 32-37

Author(s):

P.I. Loboda ◽

Younes Razaz ◽

S. Grishchenko

Keyword(s):

Magnetic Properties ◽

Cast Iron ◽

Iron Content ◽

Raw Materials ◽

Direct Reduction ◽

Processing Plant ◽

High Iron Content ◽

High Iron ◽

Direct Restoration ◽

First Time

Purpose. To substantiate the efficiency of processing hematite raw materials at the Krivoy Rog Mining and Processing Plant of Oxidized Ores using the direct reduction technology itmk3®. Metodology. Analysis of the results of the itmk3® direct restoration technology developed by Kobe Steel Ltd., Japan and Hares Engineering GmbX, Austria, with a view to using it to process Krivbass hematite ores into granulated iron (so-called “nuggets”). Findings. The involvement in the production of hematite ores (oxidized quartzite) of Krivbass with high iron content, but with low magnetic properties for their processing into granular cast iron is grounded. Originality. The use of itmk3® direct reduction technology from Kobe Steel Ltd., Japan and Hares Engineering GmbH, Austria for the processing of Krivbass hematite ores into granular cast iron is justified for the first time. Practical value. The efficiency of the use of hematite ores (oxidized quartzite) has been substantiated, which can significantly reduce the costs in the mining cycle for the economical production of metallurgical products.

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