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Alloy 20

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Yunlong Lu – One of the best experts on this subject based on the ideXlab platform.

  • laser cladding of co based Alloy tic caf2 self lubricating composite coatings on copper for continuous casting mold
    Surface & Coatings Technology, 2013
    Co-Authors: Jie Zhang, Peilei Zhang, Zhishui Yu, Chonggui Li, Peiquan Xu, Yunlong Lu

    Abstract:

    Abstract In this study, Co-based Alloy/TiC/CaF 2 self-lubricating composite coatings were successfully prepared on a Cr-Zr-Cu Alloy for continuous casting mold by Nd:YAG laser cladding. The microstructure, phase structure and wear properties were investigated by means of scanning electron microscopy (SEM) incorporating energy dispersive X-ray (EDX) and X-ray diffraction (XRD), as well as dry sliding wear test against GCr15 steel at a temperature of 400 °C. The results showed that the Co-based Alloy/TiC/CaF 2 self-lubricating composite coatings had a unique microstructure consisting of well-developed small fine spherical TiC and CaF 2 particles uniformly dispersed in the γ-Co matrix. Average hardness of the Co-based Alloy/20% TiC/10% CaF 2 (vol.) self-lubricating composite coating was about twice times that of the pure Co-based Alloy coating. It was found that the laser cladding Co-based Alloy/TiC/CaF 2 coatings on copper had good friction-reducing and antiwear abilities at temperature up to 400 °C. The composite coating obviously decreased friction coefficient and wear rate as the volume fraction of CaF 2 increased and TiC decreased. The laser cladding Co-based Alloy/20% TiC/10% CaF 2 (vol.) composite coating was characterized by mild adhesion wear and plastic deformation and relatively smooth wear surface could be observed.

Saiprasad Ravishankar – One of the best experts on this subject based on the ideXlab platform.

  • SiC and Al_2O_3 Reinforced Aluminum Metal Matrix Composites for Heavy Vehicle Clutch Applications
    Transactions of the Indian Institute of Metals, 2016
    Co-Authors: Surender Dhanasekaran, S. Sunilraj, Gangala Ramya, Saiprasad Ravishankar

    Abstract:

    Aluminium metal matrix composite is one of the most promising engineering material and gradually emerging technology in automobile industries. There are usage of this composite material in certain critical applications like clutch pressure and face plate assembly due to their enhanced mechanical, wear and physical properties. In the present study, A356 aluminum Alloy reinforced with SiC and Al_2O_3 particle was made by stir casting process. The effects of different volume fractions of SiC and Al_2O_3 particle reinforcement on microstructure and mechanical properties have been investigated. The tensile, yield strength and hardness have been increased in the particulate containing composites. As compared to base Alloy, 20 % volume fraction of SiC reinforced composites showed 16 % increase in tensile strength and 10 % volume fraction of Al_2O_3 reinforced composites showed 19 % increase in tensile strength. The yield strength of 20 % SiC and 10 % Al_2O_3 containing samples nearly 50 % higher than those of the base Alloy. Dislocation density, precipitation hardening and changes in grain size are the main mechanisms enhancing the mechanical properties of particulate reinforced composites. The 20 % SiC and 10 % Al_2O_3 reinforced composites have been identified as optimized composites for clutch pressure/face plate application.

  • SiC and Al2O3 Reinforced Aluminum Metal Matrix Composites for Heavy Vehicle Clutch Applications
    Transactions of the Indian Institute of Metals, 2016
    Co-Authors: Surender Dhanasekaran, S. Sunilraj, Gangala Ramya, Saiprasad Ravishankar

    Abstract:

    Aluminium metal matrix composite is one of the most promising engineering material and gradually emerging technology in automobile industries. There are usage of this composite material in certain critical applications like clutch pressure and face plate assembly due to their enhanced mechanical, wear and physical properties. In the present study, A356 aluminum Alloy reinforced with SiC and Al2O3 particle was made by stir casting process. The effects of different volume fractions of SiC and Al2O3 particle reinforcement on microstructure and mechanical properties have been investigated. The tensile, yield strength and hardness have been increased in the particulate containing composites. As compared to base Alloy, 20 % volume fraction of SiC reinforced composites showed 16 % increase in tensile strength and 10 % volume fraction of Al2O3 reinforced composites showed 19 % increase in tensile strength. The yield strength of 20 % SiC and 10 % Al2O3 containing samples nearly 50 % higher than those of the base Alloy. Dislocation density, precipitation hardening and changes in grain size are the main mechanisms enhancing the mechanical properties of particulate reinforced composites. The 20 % SiC and 10 % Al2O3 reinforced composites have been identified as optimized composites for clutch pressure/face plate application.

Jie Zhang – One of the best experts on this subject based on the ideXlab platform.

  • laser cladding of co based Alloy tic caf2 self lubricating composite coatings on copper for continuous casting mold
    Surface & Coatings Technology, 2013
    Co-Authors: Jie Zhang, Peilei Zhang, Zhishui Yu, Chonggui Li, Peiquan Xu, Yunlong Lu

    Abstract:

    Abstract In this study, Co-based Alloy/TiC/CaF 2 self-lubricating composite coatings were successfully prepared on a Cr-Zr-Cu Alloy for continuous casting mold by Nd:YAG laser cladding. The microstructure, phase structure and wear properties were investigated by means of scanning electron microscopy (SEM) incorporating energy dispersive X-ray (EDX) and X-ray diffraction (XRD), as well as dry sliding wear test against GCr15 steel at a temperature of 400 °C. The results showed that the Co-based Alloy/TiC/CaF 2 self-lubricating composite coatings had a unique microstructure consisting of well-developed small fine spherical TiC and CaF 2 particles uniformly dispersed in the γ-Co matrix. Average hardness of the Co-based Alloy/20% TiC/10% CaF 2 (vol.) self-lubricating composite coating was about twice times that of the pure Co-based Alloy coating. It was found that the laser cladding Co-based Alloy/TiC/CaF 2 coatings on copper had good friction-reducing and antiwear abilities at temperature up to 400 °C. The composite coating obviously decreased friction coefficient and wear rate as the volume fraction of CaF 2 increased and TiC decreased. The laser cladding Co-based Alloy/20% TiC/10% CaF 2 (vol.) composite coating was characterized by mild adhesion wear and plastic deformation and relatively smooth wear surface could be observed.

  • Laser cladding of Co-based Alloy/TiC/CaF2 self-lubricating composite coatings on copper for continuous casting mold
    Surface & Coatings Technology, 2013
    Co-Authors: Hua Yan, Jie Zhang, Peilei Zhang, Lu Yunlong

    Abstract:

    Abstract In this study, Co-based Alloy/TiC/CaF 2 self-lubricating composite coatings were successfully prepared on a Cr-Zr-Cu Alloy for continuous casting mold by Nd:YAG laser cladding. The microstructure, phase structure and wear properties were investigated by means of scanning electron microscopy (SEM) incorporating energy dispersive X-ray (EDX) and X-ray diffraction (XRD), as well as dry sliding wear test against GCr15 steel at a temperature of 400 °C. The results showed that the Co-based Alloy/TiC/CaF 2 self-lubricating composite coatings had a unique microstructure consisting of well-developed small fine spherical TiC and CaF 2 particles uniformly dispersed in the γ-Co matrix. Average hardness of the Co-based Alloy/20% TiC/10% CaF 2 (vol.) self-lubricating composite coating was about twice times that of the pure Co-based Alloy coating. It was found that the laser cladding Co-based Alloy/TiC/CaF 2 coatings on copper had good friction-reducing and antiwear abilities at temperature up to 400 °C. The composite coating obviously decreased friction coefficient and wear rate as the volume fraction of CaF 2 increased and TiC decreased. The laser cladding Co-based Alloy/20% TiC/10% CaF 2 (vol.) composite coating was characterized by mild adhesion wear and plastic deformation and relatively smooth wear surface could be observed.