The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform

J. K M Kwok - One of the best experts on this subject based on the ideXlab platform.

  • The tribological properties of Al–Cu/SiCp metal–matrix composites fabricated using the Rheocasting technique
    Journal of Materials Processing Technology, 1999
    Co-Authors: M. Gupta, J. K M Kwok
    Abstract:

    Abstract This paper reports the outcome of an investigation into the tribological (friction and wear) properties of a group of aluminium alloy-based SiC particulate reinforced metal–matrix composites (MMCs). These MMCs (Al–4.5Cu/SiCp) were fabricated using the Rheocasting process. The amount of SiC particulates was kept at 13 vol%. A series of unlubricated pin-on-disk tests was carried out to examine the tribological characteristics of this group of MMCs. In general, at a sliding speed of 1 m/s and normal loads ranging from 30 to 70 N, the rate of wear increased with increasing applied normal load. More specifically, the rheocast samples exhibited a better wear resistance at higher loads when compared to MMCs having the same composition but fabricated using the powder metallurgy route incorporating mechanical alloying. The wear resistance of rheocast composites has also been found to be comparable to commercially available composites of similar composition, suggesting that the Rheocasting process used in the present study can produce quality composites for tribological applications.

  • the tribological properties of al cu sicp metal matrix composites fabricated using the Rheocasting technique
    Journal of Materials Processing Technology, 1999
    Co-Authors: M. Gupta, J. K M Kwok
    Abstract:

    Abstract This paper reports the outcome of an investigation into the tribological (friction and wear) properties of a group of aluminium alloy-based SiC particulate reinforced metal–matrix composites (MMCs). These MMCs (Al–4.5Cu/SiCp) were fabricated using the Rheocasting process. The amount of SiC particulates was kept at 13 vol%. A series of unlubricated pin-on-disk tests was carried out to examine the tribological characteristics of this group of MMCs. In general, at a sliding speed of 1 m/s and normal loads ranging from 30 to 70 N, the rate of wear increased with increasing applied normal load. More specifically, the rheocast samples exhibited a better wear resistance at higher loads when compared to MMCs having the same composition but fabricated using the powder metallurgy route incorporating mechanical alloying. The wear resistance of rheocast composites has also been found to be comparable to commercially available composites of similar composition, suggesting that the Rheocasting process used in the present study can produce quality composites for tribological applications.

  • Tribological properties of Al-Cu/SiCp metal-matrix composites fabricated using the Rheocasting technique
    Journal of Materials Processing Technology, 1999
    Co-Authors: S. C. Lim, Liang Ren, M. Gupta, J. K M Kwok
    Abstract:

    This paper reports the outcome of an investigation into the tribological (friction and wear) properties of a group of aluminium alloy-based SiC particulate reinforced metal-matrix composites (MMCs). These MMCs (Al-4.5Cu/SiCp) were fabricated using the Rheocasting process. The amount of SiC particulates was kept at 13 vol%. A series of unlubricated pin-on-disk tests was carried out to examine the tribological characteristics of this group of MMCs. In general, at a sliding speed of 1 m/s and normal loads ranging from 30 to 70 N, the rate of wear increased with increasing applied normal load. More specifically, the rheocast samples exhibited a better wear resistance at higher loads when compared to MMCs having the same composition but fabricated using the powder metallurgy route incorporating mechanical alloying. The wear resistance of rheocast composites has also been found to be comparable to commercially available composites of similar composition, suggesting that the Rheocasting process used in the present study can produce quality composites for tribological applications.

M. Gupta - One of the best experts on this subject based on the ideXlab platform.

  • The tribological properties of Al–Cu/SiCp metal–matrix composites fabricated using the Rheocasting technique
    Journal of Materials Processing Technology, 1999
    Co-Authors: M. Gupta, J. K M Kwok
    Abstract:

    Abstract This paper reports the outcome of an investigation into the tribological (friction and wear) properties of a group of aluminium alloy-based SiC particulate reinforced metal–matrix composites (MMCs). These MMCs (Al–4.5Cu/SiCp) were fabricated using the Rheocasting process. The amount of SiC particulates was kept at 13 vol%. A series of unlubricated pin-on-disk tests was carried out to examine the tribological characteristics of this group of MMCs. In general, at a sliding speed of 1 m/s and normal loads ranging from 30 to 70 N, the rate of wear increased with increasing applied normal load. More specifically, the rheocast samples exhibited a better wear resistance at higher loads when compared to MMCs having the same composition but fabricated using the powder metallurgy route incorporating mechanical alloying. The wear resistance of rheocast composites has also been found to be comparable to commercially available composites of similar composition, suggesting that the Rheocasting process used in the present study can produce quality composites for tribological applications.

  • the tribological properties of al cu sicp metal matrix composites fabricated using the Rheocasting technique
    Journal of Materials Processing Technology, 1999
    Co-Authors: M. Gupta, J. K M Kwok
    Abstract:

    Abstract This paper reports the outcome of an investigation into the tribological (friction and wear) properties of a group of aluminium alloy-based SiC particulate reinforced metal–matrix composites (MMCs). These MMCs (Al–4.5Cu/SiCp) were fabricated using the Rheocasting process. The amount of SiC particulates was kept at 13 vol%. A series of unlubricated pin-on-disk tests was carried out to examine the tribological characteristics of this group of MMCs. In general, at a sliding speed of 1 m/s and normal loads ranging from 30 to 70 N, the rate of wear increased with increasing applied normal load. More specifically, the rheocast samples exhibited a better wear resistance at higher loads when compared to MMCs having the same composition but fabricated using the powder metallurgy route incorporating mechanical alloying. The wear resistance of rheocast composites has also been found to be comparable to commercially available composites of similar composition, suggesting that the Rheocasting process used in the present study can produce quality composites for tribological applications.

  • Tribological properties of Al-Cu/SiCp metal-matrix composites fabricated using the Rheocasting technique
    Journal of Materials Processing Technology, 1999
    Co-Authors: S. C. Lim, Liang Ren, M. Gupta, J. K M Kwok
    Abstract:

    This paper reports the outcome of an investigation into the tribological (friction and wear) properties of a group of aluminium alloy-based SiC particulate reinforced metal-matrix composites (MMCs). These MMCs (Al-4.5Cu/SiCp) were fabricated using the Rheocasting process. The amount of SiC particulates was kept at 13 vol%. A series of unlubricated pin-on-disk tests was carried out to examine the tribological characteristics of this group of MMCs. In general, at a sliding speed of 1 m/s and normal loads ranging from 30 to 70 N, the rate of wear increased with increasing applied normal load. More specifically, the rheocast samples exhibited a better wear resistance at higher loads when compared to MMCs having the same composition but fabricated using the powder metallurgy route incorporating mechanical alloying. The wear resistance of rheocast composites has also been found to be comparable to commercially available composites of similar composition, suggesting that the Rheocasting process used in the present study can produce quality composites for tribological applications.

Hai Bo Zhao - One of the best experts on this subject based on the ideXlab platform.

  • numerical analysis on thermal field in Rheocasting rolling of semi solid magnesium
    Materials Science Forum, 2011
    Co-Authors: Ying Zhang, Jin Hua Xu, Mao Peng Geng, Hai Bo Zhao
    Abstract:

    The process on Rheocasting-rolling of semi-solid AZ91D magnesium alloy was investigated by the finite element method from the aspect of fluid mechanics .The mathematical model of the casting-rolling zone was built based on the analysis on the heat transfer mode and boundary conditions of the casting-rolling zone. The numerical simulations were carried out by different casting-rolling parameters to observe the full solidification point and find the best pouring temperature. The numerical simulation results showed that when the semi-solid slurry temperature was 584°C, magnesium strips with good structure and performance could be obtained by Rheocasting-rolling. This simulation provided a valid evidence to determine the optimal process parameters.

  • study on Rheocasting rolling of semi solid az31b magnesium alloy
    Advanced Materials Research, 2010
    Co-Authors: Ying Zhang, Jin Hua Xu, Mao Peng Geng, Hai Bo Zhao
    Abstract:

    Analysis on microstructure of semi-solid AZ31B magnesium alloy produced under different technological parameters were done, hot rolling experiments of AZ31B magnesium alloy semi-solid strips were carried out on the Rheocasting-rolling machine which was developed by ourselves. The result shows that the strips after the Rheocasting-rolling of AZ31B semi-solid magnesium alloy have good plasticity and rolling properties, this offers theory basis for reprocessing of AZ31B.

  • investigation in Rheocasting rolling for semi solid magnesium alloy used by slope
    Advanced Materials Research, 2010
    Co-Authors: Ying Zhang, Jin Hua Xu, Mao Peng Geng, Hai Bo Zhao
    Abstract:

    The experiment of the Rheocasting-rolling for semi-solid magnesium was carried out on the equipment made by ourselves in our laboratory. Semi-solid AZ91D magnesium slurry was prepared by cooling slope and the evolution of microstructure under different technological parameters such as pouring temperature, casting temperature, standing time, angle of slope and length of slope et al were studied. The results show that the technological parameters have great influence on the microstructure of the semi-solid magnesium slurry. The results show that the optimum parameters of slope method were: pouring temperature 630 degrees；angle of slope 60°；length of slope 0.570m.

  • coupled numerical simulation of process in Rheocasting rolling for semi solid magnesium alloy used by slope
    Advanced Materials Research, 2010
    Co-Authors: Ying Zhang, Mao Peng Geng, Hai Bo Zhao, Jin Hua Xu
    Abstract:

    By the finite element method, the N-S momentum, energy equations and continuum equations, etc. which describe the fluid flow and heat transfer in the slope of the Rheocasting-rolling for Semi-solid Magnesium Alloy were computed. The influence of the different slope parameters( pouring temperature, length of slope, lean angle)on the metallographic structure of semi-solid magnesium alloy was analyzed. The simulative results can provide effective data to confirm optimized slope size and technical parameter.

Ying Zhang - One of the best experts on this subject based on the ideXlab platform.

  • numerical analysis on thermal field in Rheocasting rolling of semi solid magnesium
    Materials Science Forum, 2011
    Co-Authors: Ying Zhang, Jin Hua Xu, Mao Peng Geng, Hai Bo Zhao
    Abstract:

    The process on Rheocasting-rolling of semi-solid AZ91D magnesium alloy was investigated by the finite element method from the aspect of fluid mechanics .The mathematical model of the casting-rolling zone was built based on the analysis on the heat transfer mode and boundary conditions of the casting-rolling zone. The numerical simulations were carried out by different casting-rolling parameters to observe the full solidification point and find the best pouring temperature. The numerical simulation results showed that when the semi-solid slurry temperature was 584°C, magnesium strips with good structure and performance could be obtained by Rheocasting-rolling. This simulation provided a valid evidence to determine the optimal process parameters.

  • study on Rheocasting rolling of semi solid az31b magnesium alloy
    Advanced Materials Research, 2010
    Co-Authors: Ying Zhang, Jin Hua Xu, Mao Peng Geng, Hai Bo Zhao
    Abstract:

    Analysis on microstructure of semi-solid AZ31B magnesium alloy produced under different technological parameters were done, hot rolling experiments of AZ31B magnesium alloy semi-solid strips were carried out on the Rheocasting-rolling machine which was developed by ourselves. The result shows that the strips after the Rheocasting-rolling of AZ31B semi-solid magnesium alloy have good plasticity and rolling properties, this offers theory basis for reprocessing of AZ31B.

  • investigation in Rheocasting rolling for semi solid magnesium alloy used by slope
    Advanced Materials Research, 2010
    Co-Authors: Ying Zhang, Jin Hua Xu, Mao Peng Geng, Hai Bo Zhao
    Abstract:

    The experiment of the Rheocasting-rolling for semi-solid magnesium was carried out on the equipment made by ourselves in our laboratory. Semi-solid AZ91D magnesium slurry was prepared by cooling slope and the evolution of microstructure under different technological parameters such as pouring temperature, casting temperature, standing time, angle of slope and length of slope et al were studied. The results show that the technological parameters have great influence on the microstructure of the semi-solid magnesium slurry. The results show that the optimum parameters of slope method were: pouring temperature 630 degrees；angle of slope 60°；length of slope 0.570m.

  • coupled numerical simulation of process in Rheocasting rolling for semi solid magnesium alloy used by slope
    Advanced Materials Research, 2010
    Co-Authors: Ying Zhang, Mao Peng Geng, Hai Bo Zhao, Jin Hua Xu
    Abstract:

    By the finite element method, the N-S momentum, energy equations and continuum equations, etc. which describe the fluid flow and heat transfer in the slope of the Rheocasting-rolling for Semi-solid Magnesium Alloy were computed. The influence of the different slope parameters( pouring temperature, length of slope, lean angle)on the metallographic structure of semi-solid magnesium alloy was analyzed. The simulative results can provide effective data to confirm optimized slope size and technical parameter.

Jin Hua Xu - One of the best experts on this subject based on the ideXlab platform.

  • numerical analysis on thermal field in Rheocasting rolling of semi solid magnesium
    Materials Science Forum, 2011
    Co-Authors: Ying Zhang, Jin Hua Xu, Mao Peng Geng, Hai Bo Zhao
    Abstract:

    The process on Rheocasting-rolling of semi-solid AZ91D magnesium alloy was investigated by the finite element method from the aspect of fluid mechanics .The mathematical model of the casting-rolling zone was built based on the analysis on the heat transfer mode and boundary conditions of the casting-rolling zone. The numerical simulations were carried out by different casting-rolling parameters to observe the full solidification point and find the best pouring temperature. The numerical simulation results showed that when the semi-solid slurry temperature was 584°C, magnesium strips with good structure and performance could be obtained by Rheocasting-rolling. This simulation provided a valid evidence to determine the optimal process parameters.

  • study on Rheocasting rolling of semi solid az31b magnesium alloy
    Advanced Materials Research, 2010
    Co-Authors: Ying Zhang, Jin Hua Xu, Mao Peng Geng, Hai Bo Zhao
    Abstract:

    Analysis on microstructure of semi-solid AZ31B magnesium alloy produced under different technological parameters were done, hot rolling experiments of AZ31B magnesium alloy semi-solid strips were carried out on the Rheocasting-rolling machine which was developed by ourselves. The result shows that the strips after the Rheocasting-rolling of AZ31B semi-solid magnesium alloy have good plasticity and rolling properties, this offers theory basis for reprocessing of AZ31B.

  • investigation in Rheocasting rolling for semi solid magnesium alloy used by slope
    Advanced Materials Research, 2010
    Co-Authors: Ying Zhang, Jin Hua Xu, Mao Peng Geng, Hai Bo Zhao
    Abstract:

    The experiment of the Rheocasting-rolling for semi-solid magnesium was carried out on the equipment made by ourselves in our laboratory. Semi-solid AZ91D magnesium slurry was prepared by cooling slope and the evolution of microstructure under different technological parameters such as pouring temperature, casting temperature, standing time, angle of slope and length of slope et al were studied. The results show that the technological parameters have great influence on the microstructure of the semi-solid magnesium slurry. The results show that the optimum parameters of slope method were: pouring temperature 630 degrees；angle of slope 60°；length of slope 0.570m.

  • coupled numerical simulation of process in Rheocasting rolling for semi solid magnesium alloy used by slope
    Advanced Materials Research, 2010
    Co-Authors: Ying Zhang, Mao Peng Geng, Hai Bo Zhao, Jin Hua Xu
    Abstract:

    By the finite element method, the N-S momentum, energy equations and continuum equations, etc. which describe the fluid flow and heat transfer in the slope of the Rheocasting-rolling for Semi-solid Magnesium Alloy were computed. The influence of the different slope parameters( pouring temperature, length of slope, lean angle)on the metallographic structure of semi-solid magnesium alloy was analyzed. The simulative results can provide effective data to confirm optimized slope size and technical parameter.