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S C Sharma - One of the best experts on this subject based on the ideXlab platform.
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solidification behaviour of water cooled and subzero Chilled Cast Iron
Journal of Alloys and Compounds, 1999Co-Authors: K H W Seah, Joel Hemanth, S C SharmaAbstract:Hypereutectic Cast Iron specimens Cast using chills that were water-cooled and liquid-nitrogen-cooled were compared with specimens of the same chemical composition which were sand Cast without any chill. The solidification behaviour, number of eutectic cells, grain size and the effects of these on the mechanical properties like strength and fracture toughness were recorded and analysed in this paper.
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wear characteristics of sub zero Chilled Cast Iron
Wear, 1996Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:This paper presents the results obtained and the deductions made from a series of wear tests involving sub-zero Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu, and chromium contents ranging from 0.0% to 0.2%. By using copper chills of different thicknesses, the effect of wear resistance of varying the chill rate was also examined. The wear tests were carried out using a modified pin-on-disk method. It was found that wear resistance is highly dependent on the chromium content of the material, as well as the rate of chill. Moreover, wear resistance also increases monotonically with hardness and tensile strength.
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Fracture toughness of sub-zero-Chilled Cast Iron
Journal of Materials Science, 1995Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:A series of fracture toughness experiments were carried out involving sub-zero-Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu, and chromium contents ranging from 0.0%–0.2%. By using copper chills of different thicknesses, the effect on fracture toughness of varying the chill rate was also examined. The fracture toughness tests were carried out using three-point bend specimens, each with a chevron notch, as per ASTM E 399-1974 standards. It was found that fracture toughness is highly dependent on the location on the Casting from where the test specimens are taken and also on the chromium content of the material. Chill thickness, however, does not significantly affect the fracture toughness of the material. There was found to be an approximately linear relationship between fracture toughness and pearlite content, in which fracture toughness increases as pearlite content decreases and vice versa.
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tensile strength and hardness of sub zero Chilled Cast Iron
Materials & Design, 1995Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:Abstract This paper describes the results obtained and the deductions made from a series of ultimate tensile strength (UTS) and hardness tests performed on sub-zero Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu, and of chromium contents ranging from 0.0% to 0.2%. By using copper chills of different thicknesses, the effect on UTS and hardness of varying the chill rate was also examined. All the tests were carried out in conformance with AFS (American Foundryman's Society) standards. It was found that both the UTS and hardness are significantly increased when chromium content and/or rate of cooling are increased. Moreover, it was found that, like steel and grey Cast Iron, the hardness of sub-zero Chilled Cast Iron has a definite linear relationship with the UTS. This means that it is possible to predict the hardness if the UTS is known and vice versa.
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corrosion behaviour of sub zero Chilled Cast Iron
Materials & Design, 1994Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:Abstract This paper describes the results obtained and the deductions made from a series of corrosion experiments involving sub-zero Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu and of chromium contents ranging from 0.0% to 0.2%. By using copper chills of different thicknesses the effect on corrosion of varying the chill rate was also examined. The corrosion tests employed were the weight-loss method according to ASTM G 67–80 standards. The microstructures of the corrosion products were also examined. Corrosion resistance was found to increase significantly with increase in chromium content. Nevertheless, even with high chromium content, some pitting was detected in the initial stages of most of the tests. Generally, corrosion attack was found to be most severe during the initial stage of each test but it invariably decreased to a very low value in the later stages, probably due to the formation of an adherent protective layer on the metal surface.
Joel Hemanth - One of the best experts on this subject based on the ideXlab platform.
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solidification behavior of water cooled and subzero Chilled Cast Iron on mechanical properties
Journal of Materials Engineering and Performance, 2001Co-Authors: Joel HemanthAbstract:Hypoeutectic Cast Iron specimens Cast using chills that are water-cooled and liquid-nitrogen-cooled (subzero chilling) were compared with specimens of the same chemical composition, which were sand-Cast without any chill. The solidification behavior, number of eutectic cells, grain size, and effects of these on the mechanical properties such as strength and fracture toughness were recorded and analyzed in this paper.
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Solidification behavior of water-cooled and subzero-Chilled Cast Iron on mechanical properties
Journal of Materials Engineering and Performance, 2001Co-Authors: Joel HemanthAbstract:Hypoeutectic Cast Iron specimens Cast using chills that are water-cooled and liquid-nitrogen-cooled (subzero chilling) were compared with specimens of the same chemical composition, which were sand-Cast without any chill. The solidification behavior, number of eutectic cells, grain size, and effects of these on the mechanical properties such as strength and fracture toughness were recorded and analyzed in this paper. It is revealed from the above investigation that subzero and water-cooled Chilled Cast Irons exhibit severe under cooling as compared to that of normal sand-Cast Iron. Thus, it is concluded from the investigation that nucleation conditions are completely altered during solidification, which is considered to be responsible for the variation in eutectic cell size, grain size, microstructure, and hence mechanical properties of the Cast Iron.
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solidification behaviour of water cooled and subzero Chilled Cast Iron
Journal of Alloys and Compounds, 1999Co-Authors: K H W Seah, Joel Hemanth, S C SharmaAbstract:Hypereutectic Cast Iron specimens Cast using chills that were water-cooled and liquid-nitrogen-cooled were compared with specimens of the same chemical composition which were sand Cast without any chill. The solidification behaviour, number of eutectic cells, grain size and the effects of these on the mechanical properties like strength and fracture toughness were recorded and analysed in this paper.
K H W Seah - One of the best experts on this subject based on the ideXlab platform.
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solidification behaviour of water cooled and subzero Chilled Cast Iron
Journal of Alloys and Compounds, 1999Co-Authors: K H W Seah, Joel Hemanth, S C SharmaAbstract:Hypereutectic Cast Iron specimens Cast using chills that were water-cooled and liquid-nitrogen-cooled were compared with specimens of the same chemical composition which were sand Cast without any chill. The solidification behaviour, number of eutectic cells, grain size and the effects of these on the mechanical properties like strength and fracture toughness were recorded and analysed in this paper.
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wear characteristics of sub zero Chilled Cast Iron
Wear, 1996Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:This paper presents the results obtained and the deductions made from a series of wear tests involving sub-zero Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu, and chromium contents ranging from 0.0% to 0.2%. By using copper chills of different thicknesses, the effect of wear resistance of varying the chill rate was also examined. The wear tests were carried out using a modified pin-on-disk method. It was found that wear resistance is highly dependent on the chromium content of the material, as well as the rate of chill. Moreover, wear resistance also increases monotonically with hardness and tensile strength.
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Fracture toughness of sub-zero-Chilled Cast Iron
Journal of Materials Science, 1995Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:A series of fracture toughness experiments were carried out involving sub-zero-Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu, and chromium contents ranging from 0.0%–0.2%. By using copper chills of different thicknesses, the effect on fracture toughness of varying the chill rate was also examined. The fracture toughness tests were carried out using three-point bend specimens, each with a chevron notch, as per ASTM E 399-1974 standards. It was found that fracture toughness is highly dependent on the location on the Casting from where the test specimens are taken and also on the chromium content of the material. Chill thickness, however, does not significantly affect the fracture toughness of the material. There was found to be an approximately linear relationship between fracture toughness and pearlite content, in which fracture toughness increases as pearlite content decreases and vice versa.
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tensile strength and hardness of sub zero Chilled Cast Iron
Materials & Design, 1995Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:Abstract This paper describes the results obtained and the deductions made from a series of ultimate tensile strength (UTS) and hardness tests performed on sub-zero Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu, and of chromium contents ranging from 0.0% to 0.2%. By using copper chills of different thicknesses, the effect on UTS and hardness of varying the chill rate was also examined. All the tests were carried out in conformance with AFS (American Foundryman's Society) standards. It was found that both the UTS and hardness are significantly increased when chromium content and/or rate of cooling are increased. Moreover, it was found that, like steel and grey Cast Iron, the hardness of sub-zero Chilled Cast Iron has a definite linear relationship with the UTS. This means that it is possible to predict the hardness if the UTS is known and vice versa.
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corrosion behaviour of sub zero Chilled Cast Iron
Materials & Design, 1994Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:Abstract This paper describes the results obtained and the deductions made from a series of corrosion experiments involving sub-zero Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu and of chromium contents ranging from 0.0% to 0.2%. By using copper chills of different thicknesses the effect on corrosion of varying the chill rate was also examined. The corrosion tests employed were the weight-loss method according to ASTM G 67–80 standards. The microstructures of the corrosion products were also examined. Corrosion resistance was found to increase significantly with increase in chromium content. Nevertheless, even with high chromium content, some pitting was detected in the initial stages of most of the tests. Generally, corrosion attack was found to be most severe during the initial stage of each test but it invariably decreased to a very low value in the later stages, probably due to the formation of an adherent protective layer on the metal surface.
J Hemanth - One of the best experts on this subject based on the ideXlab platform.
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Effect of cooling rate on eutectic cell count, grain size, microstructure, and ultimate tensile strength of hypoeutectic Cast Iron
Journal of Materials Engineering and Performance, 1999Co-Authors: J HemanthAbstract:This article describes a series of microstructural and strength studies performed on hypoeutectic Cast Iron, which was sand Cast using a variety of end chills (metallic, nonmetallic, water-cooled, and subzero, respectively). The effects of cooling rate on the eutectic cell count (ECC), grain size, and the ultimate tensile strength (UTS) were evaluated. Attempts were also made to explain these effects and to correlate the UTS with ECC. It was found that subzero Chilled and water-cool, Chilled Cast Iron exhibit severe undercooling compared to normal sand Cast Iron. It was concluded from this investigation that nucleation conditions are completely altered but growth conditions prevail as usual. Therefore, undercooling during solidification is considered to be responsible for variation in ECC, grain size, microstructure, and tensile strength.
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wear characteristics of sub zero Chilled Cast Iron
Wear, 1996Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:This paper presents the results obtained and the deductions made from a series of wear tests involving sub-zero Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu, and chromium contents ranging from 0.0% to 0.2%. By using copper chills of different thicknesses, the effect of wear resistance of varying the chill rate was also examined. The wear tests were carried out using a modified pin-on-disk method. It was found that wear resistance is highly dependent on the chromium content of the material, as well as the rate of chill. Moreover, wear resistance also increases monotonically with hardness and tensile strength.
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Fracture toughness of sub-zero-Chilled Cast Iron
Journal of Materials Science, 1995Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:A series of fracture toughness experiments were carried out involving sub-zero-Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu, and chromium contents ranging from 0.0%–0.2%. By using copper chills of different thicknesses, the effect on fracture toughness of varying the chill rate was also examined. The fracture toughness tests were carried out using three-point bend specimens, each with a chevron notch, as per ASTM E 399-1974 standards. It was found that fracture toughness is highly dependent on the location on the Casting from where the test specimens are taken and also on the chromium content of the material. Chill thickness, however, does not significantly affect the fracture toughness of the material. There was found to be an approximately linear relationship between fracture toughness and pearlite content, in which fracture toughness increases as pearlite content decreases and vice versa.
-
tensile strength and hardness of sub zero Chilled Cast Iron
Materials & Design, 1995Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:Abstract This paper describes the results obtained and the deductions made from a series of ultimate tensile strength (UTS) and hardness tests performed on sub-zero Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu, and of chromium contents ranging from 0.0% to 0.2%. By using copper chills of different thicknesses, the effect on UTS and hardness of varying the chill rate was also examined. All the tests were carried out in conformance with AFS (American Foundryman's Society) standards. It was found that both the UTS and hardness are significantly increased when chromium content and/or rate of cooling are increased. Moreover, it was found that, like steel and grey Cast Iron, the hardness of sub-zero Chilled Cast Iron has a definite linear relationship with the UTS. This means that it is possible to predict the hardness if the UTS is known and vice versa.
-
corrosion behaviour of sub zero Chilled Cast Iron
Materials & Design, 1994Co-Authors: K H W Seah, J Hemanth, S C SharmaAbstract:Abstract This paper describes the results obtained and the deductions made from a series of corrosion experiments involving sub-zero Chilled (using liquid nitrogen) Cast Iron containing 1.5% Cu and of chromium contents ranging from 0.0% to 0.2%. By using copper chills of different thicknesses the effect on corrosion of varying the chill rate was also examined. The corrosion tests employed were the weight-loss method according to ASTM G 67–80 standards. The microstructures of the corrosion products were also examined. Corrosion resistance was found to increase significantly with increase in chromium content. Nevertheless, even with high chromium content, some pitting was detected in the initial stages of most of the tests. Generally, corrosion attack was found to be most severe during the initial stage of each test but it invariably decreased to a very low value in the later stages, probably due to the formation of an adherent protective layer on the metal surface.
Na Shun-san - One of the best experts on this subject based on the ideXlab platform.
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Residual Stress of Roll Measured by Stress Ring
Physical Testing and Chemical Analysis, 2020Co-Authors: Na Shun-sanAbstract:The stress ring specimens were intercepted from roll body of three kind of materials,including ductile Cast Iron,Chilled Cast Iron and bainitic Cast Iron,respectively,after different heat treatment process.The internal residual stress of roll was determined.The stress calculation formula of stress ring specimen was proved theoretically.The stress components existed in roll were determined.The test results showed the effect of processing condition to eliminate stress.The difference of residual stress was large in roll of different material and different heat treatment.