Estimation of the Tendency towards Shrinkage in Spheroidal-graphite Iron Melts using Thermal Analysis

Yang, Yunfeng; Alhainen, Jouni

doi:10.1080/09534962.1992.11819095

Cited by 3 publications

(3 citation statements)

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“…Frontiers of Manufacturing and Design Science III Fig. 2 is microstructure image of parallel pressing force surface of copper matrix composite materials added 24% graphite, through calculation, the relative fractal dimension is 1.5981,the theoretical fractal dimension is 1.5700 calculated by formula (4).Form this we can know, formula (4) can estimate fractal dimension of parallel pressing force surface of copper matrix composite materials added different proportion graphite, the complex degree of microstructure image of parallel pressing force surface of copper matrix composite materials can be reflected by fractal dimension.…”

Section: Copper Matrix Composites Formula Proportion Discussionmentioning

confidence: 99%

“…Fractal, as the important achievement in nonlinear science research, which provides new language and quantitative description for people to understand the overall from the local and to understand the infinite from the limited. Along with the research, fractal theory has been widely applied on physics,chemistry,biology, astronomy, material science, computer graphics, economics and Philosophy and so on [2][3][4][5][6]. Fractal dimension, as the quantitative characterization and basic parameter, its characterization and the basic principle is one of the important principles of fractal theory, such as Hausdorff dimension, information dimension, similarity dimension, box dimension, correlation dimension, capacity dimension, spectral dimension, Lyapunov dimension and so on.…”

Section: Introductionmentioning

confidence: 99%

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Research on the Microstructure Fractal Characteristics of Copper Matrix Composites

2012

AMM

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Through the analysis and research on the Microstructure of copper matrix composites, according to the fractal theory, calculated microstructure friction dimension of cross section and parallel pressed power side of copper matrix composites under different experimental conditions. The results show that, for parallel pressed power side, fractal dimension reflects the distribution laws of graphite in the sample, the fractal dimension is more larger, the organization chart is more complex, the distribution of graphite is more irregular, so the irregularity of graphite distribution can be described by fractal dimension, fractal dimension can be used as a characterization parameter of organizational form for copper matrix composites. Under the condition of virtually expanded sample，in the view that Sn,Zn and SiO2 is not changed respectively, and the sum of Cu and graphite is 85%,by use of linear regression model to estimate parallel pressed power side of microstructure fractal dimension of different composition in copper matrix composites.

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Section: Copper Matrix Composites Formula Proportion Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on the Microstructure Fractal Characteristics of Copper Matrix Composites

2012

AMM

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“…In 1992, Yang and Alhainen made volumetric investigations on globular castings 5 in the similar layout like that of Schmidt et al One of the innovative values of their work was the usage of spherical geometry since sphere is more even than other previous specimen from the thermal point of view. Moreover, they also solved the problem of the effect of the gating system by sectioning it from the casting with a quartz bar.…”

Section: Direct Measurements Of Volume Changementioning

confidence: 99%

On problems of volume change measurements in lamellar cast iron

Svidró

Diószegi

2013

International Journal of Cast Metals Research

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Solidification of lamellar cast iron is a complex mechanism due to the contracting austenite phase and the expanding graphite phase precipitation. The combined effect of contraction-expansion has an influence on the volume change related defects (shrinkage porosity and penetration). Critical moments in measuring volume change are the methods used for measurement together with the interpretation of the solidification based on the macrostructure. Reliable results are obtained using displacement measurement in both axial and radial direction of a cylindrical sample in combination with using two thermocouples and a force measurement unit. Common drawback of the used method together with other methods presented in the literature is the early expansion observed before the coherence of the solidifying grains. The introduced force measurement gives a novel interpretation of the columnar to equiaxed transition, and the displacement measurement in different directions within a cast sample reveal the anisotropic character of the volume change.

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Volumetric Changes during the Solidification of Cast Iron

Diószegi¹,

Svidró²

2017

Cast Iron Science and Technology

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Estimation of the Tendency towards Shrinkage in Spheroidal-graphite Iron Melts using Thermal Analysis

Cited by 3 publications

References 1 publication

Research on the Microstructure Fractal Characteristics of Copper Matrix Composites

Research on the Microstructure Fractal Characteristics of Copper Matrix Composites

On problems of volume change measurements in lamellar cast iron

Volumetric Changes during the Solidification of Cast Iron

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