scholarly journals Computational Determination of Macroscopic Mechanical and Thermal Material Properties for Different Morphological Variants of Cast Iron

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1588
Author(s):  
Christoph Herrmann ◽  
Stefan Schmid ◽  
Daniel Schneider ◽  
Michael Selzer ◽  
Britta Nestler
Keyword(s):  
Thermal Properties ◽  
Cast Iron ◽  
Synthetic Approach ◽  
Mechanical And Thermal Properties ◽  
Data Infrastructure ◽  
Temperature Range ◽  
Young’S Moduli ◽  
Graphite Morphology ◽  
Grey Cast ◽  
Morphological Variants

The sensitivity of macroscopic mechanical and thermal properties of grey cast iron is computationally investigated for a variety of graphite morphologies over a wide temperature range. In order to represent common graphite morphologies according to EN ISO 945-1, a synthetic approach is used to algorithmically generate simulation domains. The developed mechanical and thermal model is applied in a large simulation study. The study includes statistical volume elements of the graphite morphology classes GJL-150 and IA2 to IA5, with 10, 11 and 12  v.−% of graphite precipitations, respectively, for a temperature range from 20 to 750 °C. Homogenised macroscopic quantities, such as the Young’s moduli, Poisson’s ratios, yield strengths and thermal conductivities, are predicted for different morphology classes by applying simulation and data analysis tools of the research data infrastructure Kadi4Mat. This is the first work to determine the mechanical and thermal properties of the morphology classes defined in EN ISO 945-1.

scholarly journals Computational Determination of Macroscopic Mechanical and Thermal Material Properties for Different Microstructural Variants of Cast Iron

2021 ◽  
Author(s):  
Christoph Herrmann ◽  
Stefan Schmid ◽  
Daniel Schneider ◽  
Michael Selzer ◽  
Britta Nestler
Keyword(s):  
Cast Iron ◽  
Material Properties ◽  
Research Data ◽  
Synthetic Approach ◽  
Mechanical And Thermal Properties ◽  
Data Infrastructure ◽  
Temperature Range ◽  
Young’S Moduli ◽  
Grey Cast

The sensitivity of macroscopic mechanical and thermal properties of grey cast iron is computationally investigated for a variety of graphite microstructures over a wide temperature range. In order to represent common graphite microstructures according to DIN EN ISO 945-1, a synthetic approach is used to algorithmically generate simulation domains. The developed mechanical and thermal model is applied in a large simulation study. The study includes statistical volume elements of the graphite microstructures classes GG-15 and IA2 to IA5, with 10 v.-%, 11 v.-% and 12 v.-% graphite, respectively, for a temperature range from 20 °C to 750 °C. Homogenized macroscopic quantities such as the Young's moduli, Poisson's ratios, yield strengths and thermal conductivities are predicted for the different microstructure classes by applying simulation and data analysis tools of the research data infrastructure Kadi4Mat.

Mechanical and thermal properties of the glassy semiconductor chlorinated Se0 997As0 003 used as an X-ray imaging material

1989 ◽  
Vol 67 (7) ◽  
pp. 686-693 ◽  
Author(s):  
S. O. Kasap ◽  
S. Yannacopoulos
Keyword(s):  
Thermal Properties ◽  
Structural Changes ◽  
Relaxation Times ◽  
Thermal Relaxation ◽  
Mechanical And Thermal Properties ◽  
Debye Relaxation ◽  
X Ray ◽  
Temperature Range ◽  
Glass Transformation ◽  
X Ray Imaging

Mechanical and thermal properties of a typical X-ray imaging material amorphous Se0.997As0.003, chlorinated in the ppm range were investigated using thermal microhardness analysis (TμHA) and differential scanning calorimetry (DSC). The experiments were carried out over a temperature range encompassing the glass transformation to study the nature of structural changes controlling the mechanical and thermal properties. It is shown that the mechanical property microhardness when examined on an Itoh–Shishokin plot of log Vickers hardness number (VHN) vs. temperature (T) exhibits a hardness transition temperature, Tg*, in the glass transformation region. The rates of relaxation of the mechanical and thermal properties in the glass transformation region were studied by investigating the heating rate dependence of the glass transition temperatures, Tg* and Tg, defined empirically on the log VHN vs. T behavior and the DSC glass transformation endotherm, respectively. By applying the present thermoanalytical methods, it has proved possible to identify a typical Vogel–Tammann–Fulcher type of behavior in the mechanical and thermal relaxation times that correlates remarkably well with the viscosity–temperature data of M. Cukierman and D. R. Uhlmann (J. Non-Cryst. Solids, 12, 199 (1973)) as well as the dielectric loss experiments of M. Abkowitz, D. F. Pochan, and J. M. Pochan (J. Appl. Phys. 51, 1539 (1980)). The latter had previously exposed a Williams–Landel–Ferry relation for the Debye relaxation times in a-Se and a-Se: 1% As. It is therefore concluded that the behavior of mechanical, thermal, and dielectric properties of a-Se0997As0003 in the glass transformation region is inversely proportional to the viscosity, which in turn can be adequately described over a temperature range above ~30 °C by a Vogel expression.

Inoculating Influence of Re-Carburizers in Grey Cast Iron

2007 ◽  
Vol 23 ◽  
pp. 287-290
Author(s):  
Iulian Riposan ◽  
Mihai Chisamera ◽  
Stelian Stan ◽  
P. Toboc
Keyword(s):  
Cast Iron ◽  
Carbon Materials ◽  
Analysis Data ◽  
Grey Cast Iron ◽  
Cast Irons ◽  
Graphite Morphology ◽  
Grey Cast ◽  
The Difference ◽  
Solidification Parameters ◽  
Potential Carbon

In laboratory experiments Thermal Analysis data were recorded and different solidification parameters were identified to characterize the inoculation effect of the carbon materials (amorphous and crystalline structure) in low sulphur (<0.025 %S) grey cast iron. These parameters are linked to graphite morphology as well as chill formation in carburized cast irons. In low sulphur base iron the difference in inoculation efficiency between crystalline and amorphous carbon materials is limited. Secondary granular carbon materials, previously used as conductive or resistive media in electric graphitizing furnaces were found to be potential carbon raisers with visible inoculation effects in grey irons, especially those from a petroleum coke origin. A controlled presence of a low amount of SiC (2-3%) is effective, including low sulphur grey irons.

scholarly journals Study of Factors Affecting Tensile Strength of Grey Cast Iron

2021 ◽  
Vol 23 (11) ◽  
pp. 759-768
Author(s):  
Abhijit Ramesh Patil ◽  
◽  
P. N. Gore ◽  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Tensile Force ◽  
Grey Cast Iron ◽  
Steel Scrap ◽  
Factors Affecting ◽  
Graphite Morphology ◽  
Grey Cast ◽  
Clear Idea ◽  
High Temperature Tensile

Tensile strength of a material is the capacity of material to withstand tensile force without failure. Tensile strength is important mechanical property of material which gives direction to use it for proposed application safely. It is very important parameter considered in designing sound product. Grey cast iron carries properties like high compressive strength, castable, good machinability, good abrasion resistance, high thermal conductivity, resist to expand under high temperature. Tensile strength of grey cast depends mainly on carbon content, steel scrap % used, inoculation, graphite morphology, cooling time. Present paper summarizes study of factors affecting tensile strength of grey cast iron. With the study of factors affecting the tensile strength of cast iron it is very helpful to achieve required tensile strength by controlling the factors affecting strength of the material. While studying and experimenting on the behavior of tensile strength, clear idea comes into the picture how the strength is affected.

scholarly journals Glass fiber filled polyphenylenesulfide of TERMORAN©: physico-mechanical and thermal properties

2019 ◽  
pp. 52-56 ◽  
Author(s):  
A. V. Samoryadov ◽  
E. V. Kalugina ◽  
V. V. Bitt
Keyword(s):  
Thermal Properties ◽  
Glass Fiber ◽  
Thermophysical Properties ◽  
Mechanical And Thermal Properties ◽  
Temperature Range

Thermal, physico-mechanical, electro- and thermophysical properties of glass fiber filled Polyphenylene sulfides are investigated, the temperature range of products from these materials is established.

scholarly journals Auto-analysis system for graphite morphology of grey cast iron

2003 ◽  
Vol 25 (4) ◽  
pp. 87-92 ◽  
Author(s):  
Hong Jiang ◽  
Yiyong Tan ◽  
Zelan Zhang ◽  
Jiming Hu ◽  
Junfeng Lei ◽  
...  
Keyword(s):  
Cast Iron ◽  
Grey Cast Iron ◽  
Graphite Morphology ◽  
Grey Cast ◽  
Analysis System

scholarly journals Effect of HNT on mechanical and thermal properties of poly(lactic acid)/polypropylene carbonate blends

Polimery ◽  
2021 ◽  
Vol 66 (9) ◽  
pp. 459-465
Author(s):  
Intan Najwa Humaira Mohamed Haneef ◽  
Yose Fachmi Buys ◽  
Norhashimah Mohd Shaffiar ◽  
Sharifah Imihezri Syed Shaharuddin ◽  
Abdul Malek Abdul Hamid ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Glass Transition ◽  
Thermal Properties ◽  
Halloysite Nanotubes ◽  
Poly Lactic Acid ◽  
Mechanical And Thermal Properties ◽  
Melt Mixing ◽  
Elongation At Break ◽  
Young’S Moduli ◽  
Dsc Thermograms

In this work, the influence of halloysite nanotubes (HNTs) on the mechanical and thermal properties of the poly(lactic acid)/polypropylene carbonate (PLA/PPC 70/30) blend was studied. The HNT was incorporated into the PLA/PPC blend by melt mixing. It was found that addition of 2-6 wt % HNT successfully improved the tensile and flexural strength as well as the flexural and Young’s  moduli of PLA/PPC blend, due to the reinforcing effect. Although the elongation at break decreases with increasing HNT content, its value is much higher than that of pure PLA. Moreover, the addition of HNT didnot affect the miscibility of PLA and PPC, since two glass transition temperatures were observed in the DSC thermograms. However, a higher content of HNT may improve the compatibility between PLA and PPC as evidenced by the lower difference between the glass transition temperature of PPC and PLA and reduced crystallinity resulting in higher tensile strength of nanocomposites.Keywords: PLA, PPC, HNT, mechanical properties, thermal properties.

scholarly journals Determining the influence of the filler on the properties of structural thermal-resistant polymeric materials based on Phenylone C1

2021 ◽  
Vol 5 (6 (113)) ◽  
pp. 24-29
Author(s):  
Oleh Kabat ◽  
Dmytro Makarenko ◽  
Oleksii Derkach ◽  
Yevhen Muranov
Keyword(s):  
Thermal Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Silica Gel ◽  
Polymer Composite Materials ◽  
Mechanical And Thermal Properties ◽  
Original Material ◽  
Temperature Range ◽  
Study Results ◽  
Structural Plastics

This paper reports a laboratory study of the physical, mechanical, and thermal properties of designed composite materials based on Phenylone C1 filled with silica gel. Structural plastics, due to their high chemical and wear resistance, sufficient level of physical, mechanical, and thermal properties, can significantly improve the technical characteristics of machines and mechanisms. However, some structural plastics, including Phenylone C1, have a significant drawback – a narrow temperature range of their processing, which leads to a complication of technological equipment and increases the cost of production. It was established that the technical processing of the initial composite material into finished products could be improved by introducing fillers. The regularities of influence of silica gel content on the level of thermal and physical-mechanical properties of polymer composite materials based on Phenylone C1 have been established. It was found that the introduction of silica gel into Phenylone C1 leads to an increase in stress at the yield strength and modulus of elasticity at compression by 6.3 % and 13.3 %, respectively, compared to the original material. It was established that the heat resistance of the filled composite increases by 11.6 % with a decrease in thermal linear expansion by 10‒20 %, depending on the content of the filler. It was found that with an increase in silica gel concentration in the polymer matrix, the temperature of the onset of active destruction shifts towards higher temperatures. When filled in the amount of 30 % by weight, this temperature reaches 375 °C, which increases the temperature range of processing the designed material by 25 °C. The study results make it possible to optimize the system of tolerances and landings of parts made of polymer-composite materials, simplify the technology of their manufacture, and, as a result, reduce their cost

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