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M. Chakraborty - One of the best experts on this subject based on the ideXlab platform.
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Dry sliding wear behaviour of Al–12Si and Al–12Si–3Cu Cast Alloys
Materials & Design, 2009Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract This paper attempts to investigate the influence of the microstructural changes on the dry sliding wear behaviour of Al–12Si and Al–12Si–3Cu Cast Alloys by grain refinement (Al–1Ti–3B), modification (Al–10Sr) and combined action of both (Al–1Ti–3B + Al–10Sr). Results indicate that combined grain refined and modified Al–12Si–3Cu Cast Alloys have microstructures consisting of uniformly distributed α-Al grains, eutectic Al–silicon and fine CuAl 2 particles in the interdendritic region. These Alloys exhibited better wear resistance in the Cast condition compared with the same alloy subjected to only grain refinement or modification. The improved wear resistances of Al–12Si–3Cu Cast Alloys are related to the refinement of the aluminum grain size, uniform distribution of eutectic Al–silicon and fine CuAl 2 particles in the interdendritic region resulting from combined refinement and modification.
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influence of grain refinement and modification on microstructure and mechanical properties of al 7si and al 7si 2 5cu Cast Alloys
Materials Characterization, 2008Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract The microstructures and mechanical properties (impact toughness, tensile and hardness) of Al–7Si and Al–7Si–2.5Cu Cast Alloys were studied after various melt treatments like grain refinement and modification. Results indicate that combined grain refined and modified Al–7Si–2.5Cu Alloys have microstructures consisting of uniformly distributed α-Al grains, interdendritic network of fine eutectic silicon and fine CuAl 2 particles in the interdendritic region. These Alloys exhibited improved mechanical properties in as Cast condition when compared to those treated by individual addition of grain refiner or modifier. The improved mechanical properties of Al–7Si–2.5Cu Alloys are related to breakage of the large aluminum grains and uniform distribution of eutectic silicon and fine CuAl 2 particles in the interdendritic region resulting from combined refinement and modification. This paper attempts to investigate the influence of the microstructural changes in the Al–7Si and Al–7Si–2.5Cu Cast Alloys by grain refinement, modification and combined action of both on the mechanical properties (impact, tensile and hardness).
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Influence of grain refinement and modification on dry sliding wear behavior of Al-12Si and Al-12Si-3Cu Cast Alloys
International Journal of Materials Research, 2008Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract The microstructures and dry sliding wear behavior of Al-12Si and Al-12Si-3Cu Cast Alloys were studied after various melt treatments such as grain refinement and modification. Results indicate that combined grain refined and modified Al-12Si-3Cu Cast Alloys have microstructures consisting of uniformly distributed α-Al grains, eutectic Al–Si and fine CuAl2 particles in the interdendritic region. These Alloys exhibited better wear resistance in the Cast condition compared with the same alloy subjected to only grain refinement or modification. The improved wear resistances of Al-12Si-3Cu Cast Alloys are related to the refinement of the aluminum grain size, uniform distribution of eutectic Al–Si and fine CuAl2 particles in the interdendritic region resulting from combined refinement and modification. This paper attempts to investigate the influence of the microstructural changes in the Al-12Si and Al-12Si-3Cu Cast Alloys by grain refinement, modification and combined action of both on the dry sliding ...
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Impact toughness in Al–12Si and Al–12Si–3Cu Cast Alloys—Part 1: Effect of process variables and microstructure
International Journal of Impact Engineering, 2008Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract The charpy impact energy of Al–12Si and Al–12Si–3Cu Cast Alloys was measured in terms of the total absorbed energy. The standard charpy specimens 10×10×55 mm with a 2 mm V-notch were prepared from the Castings. Effect of process variables and microstructural changes on the impact toughness of Al–12Si and Al–12Si–3Cu Cast Alloys was investigated. The results indicate that combined grain refined and modified Al–12Si–3Cu Cast Alloys have microstructures consisting of uniformly distributed α -Al dendrites, eutectic Al–Si and fine CuAl 2 particles in the interdendritic region. These Alloys exhibited better impact toughness in the Cast condition compared with the same alloy subjected to only grain refinement or modification.
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Influence of melt treatments and polished CVD diamond coated insert on cutting force and surface integrity in turning of Al-7Si and Al-7Si-2.5Cu Cast Alloys
Bulletin of Materials Science, 2007Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:The microstructures, machinability and surface characteristics of Al-7Si and Al-7Si-2.5Cu Cast Alloys were studied after various melt treatments like grain refinement and modification. The results indicate that combined grain refined and modified Al-7Si-2.5Cu Cast Alloys have microstructures consisting of uniformly distributed α -Al grains, eutectic Al-silicon and fine CuAl_2 particles in the interdendritic region. These Alloys exhibited better machinability and surface characteristics in the Cast condition compared with the same alloy subjected to only grain refinement or modification. Performances of the turning inserts (uncoated and polished CVD diamond coated) were evaluated in machining Al-7Si and Al-7Si-2.5Cu Cast Alloys under dry environment using a lathe. The polished CVD diamond coated insert outperformed the uncoated cutting insert which suffered from sizeable edge buildup leading to higher cutting force and poor surface finish. The polished CVD diamond coated insert shows a very small steady wear without flaking of the diamond film during cutting. This paper attempts to investigate the influence of grain refinement, modification and combined action of both on the microstructural changes in the Al-7Si and Al-7Si-2.5Cu Cast Alloys and their machinability and surface finish when different turning inserts are used.
K.g. Basavakumar - One of the best experts on this subject based on the ideXlab platform.
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Dry sliding wear behaviour of Al–12Si and Al–12Si–3Cu Cast Alloys
Materials & Design, 2009Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract This paper attempts to investigate the influence of the microstructural changes on the dry sliding wear behaviour of Al–12Si and Al–12Si–3Cu Cast Alloys by grain refinement (Al–1Ti–3B), modification (Al–10Sr) and combined action of both (Al–1Ti–3B + Al–10Sr). Results indicate that combined grain refined and modified Al–12Si–3Cu Cast Alloys have microstructures consisting of uniformly distributed α-Al grains, eutectic Al–silicon and fine CuAl 2 particles in the interdendritic region. These Alloys exhibited better wear resistance in the Cast condition compared with the same alloy subjected to only grain refinement or modification. The improved wear resistances of Al–12Si–3Cu Cast Alloys are related to the refinement of the aluminum grain size, uniform distribution of eutectic Al–silicon and fine CuAl 2 particles in the interdendritic region resulting from combined refinement and modification.
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influence of grain refinement and modification on microstructure and mechanical properties of al 7si and al 7si 2 5cu Cast Alloys
Materials Characterization, 2008Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract The microstructures and mechanical properties (impact toughness, tensile and hardness) of Al–7Si and Al–7Si–2.5Cu Cast Alloys were studied after various melt treatments like grain refinement and modification. Results indicate that combined grain refined and modified Al–7Si–2.5Cu Alloys have microstructures consisting of uniformly distributed α-Al grains, interdendritic network of fine eutectic silicon and fine CuAl 2 particles in the interdendritic region. These Alloys exhibited improved mechanical properties in as Cast condition when compared to those treated by individual addition of grain refiner or modifier. The improved mechanical properties of Al–7Si–2.5Cu Alloys are related to breakage of the large aluminum grains and uniform distribution of eutectic silicon and fine CuAl 2 particles in the interdendritic region resulting from combined refinement and modification. This paper attempts to investigate the influence of the microstructural changes in the Al–7Si and Al–7Si–2.5Cu Cast Alloys by grain refinement, modification and combined action of both on the mechanical properties (impact, tensile and hardness).
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Influence of grain refinement and modification on dry sliding wear behavior of Al-12Si and Al-12Si-3Cu Cast Alloys
International Journal of Materials Research, 2008Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract The microstructures and dry sliding wear behavior of Al-12Si and Al-12Si-3Cu Cast Alloys were studied after various melt treatments such as grain refinement and modification. Results indicate that combined grain refined and modified Al-12Si-3Cu Cast Alloys have microstructures consisting of uniformly distributed α-Al grains, eutectic Al–Si and fine CuAl2 particles in the interdendritic region. These Alloys exhibited better wear resistance in the Cast condition compared with the same alloy subjected to only grain refinement or modification. The improved wear resistances of Al-12Si-3Cu Cast Alloys are related to the refinement of the aluminum grain size, uniform distribution of eutectic Al–Si and fine CuAl2 particles in the interdendritic region resulting from combined refinement and modification. This paper attempts to investigate the influence of the microstructural changes in the Al-12Si and Al-12Si-3Cu Cast Alloys by grain refinement, modification and combined action of both on the dry sliding ...
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Impact toughness in Al–12Si and Al–12Si–3Cu Cast Alloys—Part 1: Effect of process variables and microstructure
International Journal of Impact Engineering, 2008Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract The charpy impact energy of Al–12Si and Al–12Si–3Cu Cast Alloys was measured in terms of the total absorbed energy. The standard charpy specimens 10×10×55 mm with a 2 mm V-notch were prepared from the Castings. Effect of process variables and microstructural changes on the impact toughness of Al–12Si and Al–12Si–3Cu Cast Alloys was investigated. The results indicate that combined grain refined and modified Al–12Si–3Cu Cast Alloys have microstructures consisting of uniformly distributed α -Al dendrites, eutectic Al–Si and fine CuAl 2 particles in the interdendritic region. These Alloys exhibited better impact toughness in the Cast condition compared with the same alloy subjected to only grain refinement or modification.
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Influence of melt treatments and polished CVD diamond coated insert on cutting force and surface integrity in turning of Al-7Si and Al-7Si-2.5Cu Cast Alloys
Bulletin of Materials Science, 2007Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:The microstructures, machinability and surface characteristics of Al-7Si and Al-7Si-2.5Cu Cast Alloys were studied after various melt treatments like grain refinement and modification. The results indicate that combined grain refined and modified Al-7Si-2.5Cu Cast Alloys have microstructures consisting of uniformly distributed α -Al grains, eutectic Al-silicon and fine CuAl_2 particles in the interdendritic region. These Alloys exhibited better machinability and surface characteristics in the Cast condition compared with the same alloy subjected to only grain refinement or modification. Performances of the turning inserts (uncoated and polished CVD diamond coated) were evaluated in machining Al-7Si and Al-7Si-2.5Cu Cast Alloys under dry environment using a lathe. The polished CVD diamond coated insert outperformed the uncoated cutting insert which suffered from sizeable edge buildup leading to higher cutting force and poor surface finish. The polished CVD diamond coated insert shows a very small steady wear without flaking of the diamond film during cutting. This paper attempts to investigate the influence of grain refinement, modification and combined action of both on the microstructural changes in the Al-7Si and Al-7Si-2.5Cu Cast Alloys and their machinability and surface finish when different turning inserts are used.
Salem Seifeddine - One of the best experts on this subject based on the ideXlab platform.
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Optimisation of heat treatment of Al–Cu–(Mg–Ag) Cast Alloys
Journal of Thermal Analysis and Calorimetry, 2019Co-Authors: Mohammadreza Zamani, Stefania Toschi, Lorella Ceschini, Alessandro Morri, Salem SeifeddineAbstract:The optimisation of heat treatment parameters for Al–Cu–(Mg–Ag) Cast Alloys (2xxx) having different microstructural scales was investigated. Thermo-Calc software was used to design optimal alloy compositions. Differential scanning calorimetry (DSC), scanning electron microscopy and wavelength-dispersive spectroscopy technique were employed to determine proper solution heat treatment temperature and homogenisation time as well as incidence of incipient melting. Proper artificial ageing temperature for each alloy was identified using DSC analysis and hardness measurement. Microstructural scale had a pronounced influence on time and temperature required for complete dissolution of Al2Cu and homogenisation of Cu solute atoms in the α-Al matrix. Refined microstructure required only one-step solution treatment and relatively short solution treatment of 10 h to achieve dissolution and homogenisation, while coarser microstructures desired longer time. Addition of Mg to Al–Cu Alloys promoted the formation of phases having a rather low melting temperature which demands multi-step solution treatment. Presence of Ag decreases the melting temperature of intermetallics (beside Al2Cu) and improvement in age-hardening response. Peak-aged temperature is primarily affected by the chemical composition rather than the microstructural scale.
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Influence of Si and cooling rate onmicrostructure and mechanical properties of Al-Si-Mg Cast Alloys
2015Co-Authors: Baiwei Zhu, Salem Seifeddine, Peter Leisner, Anders E.w. JarforsAbstract:Influence of Si and cooling rate onmicrostructure and mechanical properties of Al-Si-Mg Cast Alloys
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A Novel Approach for the Assessment of Eutectic Si Modification and Tensile Properties of Al-Si Cast Alloys
2015Co-Authors: Mohammadreza Zamani, Salem SeifeddineAbstract:This study presents a correlation between the depression in eutectic growth temperature, as a result of modification, and the tensile properties of Al-Si Cast Alloys. In order to study the role tha ...
P.g. Mukunda - One of the best experts on this subject based on the ideXlab platform.
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Dry sliding wear behaviour of Al–12Si and Al–12Si–3Cu Cast Alloys
Materials & Design, 2009Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract This paper attempts to investigate the influence of the microstructural changes on the dry sliding wear behaviour of Al–12Si and Al–12Si–3Cu Cast Alloys by grain refinement (Al–1Ti–3B), modification (Al–10Sr) and combined action of both (Al–1Ti–3B + Al–10Sr). Results indicate that combined grain refined and modified Al–12Si–3Cu Cast Alloys have microstructures consisting of uniformly distributed α-Al grains, eutectic Al–silicon and fine CuAl 2 particles in the interdendritic region. These Alloys exhibited better wear resistance in the Cast condition compared with the same alloy subjected to only grain refinement or modification. The improved wear resistances of Al–12Si–3Cu Cast Alloys are related to the refinement of the aluminum grain size, uniform distribution of eutectic Al–silicon and fine CuAl 2 particles in the interdendritic region resulting from combined refinement and modification.
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influence of grain refinement and modification on microstructure and mechanical properties of al 7si and al 7si 2 5cu Cast Alloys
Materials Characterization, 2008Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract The microstructures and mechanical properties (impact toughness, tensile and hardness) of Al–7Si and Al–7Si–2.5Cu Cast Alloys were studied after various melt treatments like grain refinement and modification. Results indicate that combined grain refined and modified Al–7Si–2.5Cu Alloys have microstructures consisting of uniformly distributed α-Al grains, interdendritic network of fine eutectic silicon and fine CuAl 2 particles in the interdendritic region. These Alloys exhibited improved mechanical properties in as Cast condition when compared to those treated by individual addition of grain refiner or modifier. The improved mechanical properties of Al–7Si–2.5Cu Alloys are related to breakage of the large aluminum grains and uniform distribution of eutectic silicon and fine CuAl 2 particles in the interdendritic region resulting from combined refinement and modification. This paper attempts to investigate the influence of the microstructural changes in the Al–7Si and Al–7Si–2.5Cu Cast Alloys by grain refinement, modification and combined action of both on the mechanical properties (impact, tensile and hardness).
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Influence of grain refinement and modification on dry sliding wear behavior of Al-12Si and Al-12Si-3Cu Cast Alloys
International Journal of Materials Research, 2008Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract The microstructures and dry sliding wear behavior of Al-12Si and Al-12Si-3Cu Cast Alloys were studied after various melt treatments such as grain refinement and modification. Results indicate that combined grain refined and modified Al-12Si-3Cu Cast Alloys have microstructures consisting of uniformly distributed α-Al grains, eutectic Al–Si and fine CuAl2 particles in the interdendritic region. These Alloys exhibited better wear resistance in the Cast condition compared with the same alloy subjected to only grain refinement or modification. The improved wear resistances of Al-12Si-3Cu Cast Alloys are related to the refinement of the aluminum grain size, uniform distribution of eutectic Al–Si and fine CuAl2 particles in the interdendritic region resulting from combined refinement and modification. This paper attempts to investigate the influence of the microstructural changes in the Al-12Si and Al-12Si-3Cu Cast Alloys by grain refinement, modification and combined action of both on the dry sliding ...
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Impact toughness in Al–12Si and Al–12Si–3Cu Cast Alloys—Part 1: Effect of process variables and microstructure
International Journal of Impact Engineering, 2008Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:Abstract The charpy impact energy of Al–12Si and Al–12Si–3Cu Cast Alloys was measured in terms of the total absorbed energy. The standard charpy specimens 10×10×55 mm with a 2 mm V-notch were prepared from the Castings. Effect of process variables and microstructural changes on the impact toughness of Al–12Si and Al–12Si–3Cu Cast Alloys was investigated. The results indicate that combined grain refined and modified Al–12Si–3Cu Cast Alloys have microstructures consisting of uniformly distributed α -Al dendrites, eutectic Al–Si and fine CuAl 2 particles in the interdendritic region. These Alloys exhibited better impact toughness in the Cast condition compared with the same alloy subjected to only grain refinement or modification.
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Influence of melt treatments and polished CVD diamond coated insert on cutting force and surface integrity in turning of Al-7Si and Al-7Si-2.5Cu Cast Alloys
Bulletin of Materials Science, 2007Co-Authors: K.g. Basavakumar, P.g. Mukunda, M. ChakrabortyAbstract:The microstructures, machinability and surface characteristics of Al-7Si and Al-7Si-2.5Cu Cast Alloys were studied after various melt treatments like grain refinement and modification. The results indicate that combined grain refined and modified Al-7Si-2.5Cu Cast Alloys have microstructures consisting of uniformly distributed α -Al grains, eutectic Al-silicon and fine CuAl_2 particles in the interdendritic region. These Alloys exhibited better machinability and surface characteristics in the Cast condition compared with the same alloy subjected to only grain refinement or modification. Performances of the turning inserts (uncoated and polished CVD diamond coated) were evaluated in machining Al-7Si and Al-7Si-2.5Cu Cast Alloys under dry environment using a lathe. The polished CVD diamond coated insert outperformed the uncoated cutting insert which suffered from sizeable edge buildup leading to higher cutting force and poor surface finish. The polished CVD diamond coated insert shows a very small steady wear without flaking of the diamond film during cutting. This paper attempts to investigate the influence of grain refinement, modification and combined action of both on the microstructural changes in the Al-7Si and Al-7Si-2.5Cu Cast Alloys and their machinability and surface finish when different turning inserts are used.
Hugh Shercliff - One of the best experts on this subject based on the ideXlab platform.
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Modelling of solidification and heat treatment for the prediction of yield stress of Cast Alloys
Acta Materialia, 2002Co-Authors: Charles-andré Gandin, Gilles Canova, Michael Ashby, Michel Rappaz, Yves Bréchet, Hugh ShercliffAbstract:A model has been developed for the prediction of yield stress of Cast Alloys. It consists of integrated unit step models of the physical metallurgy of solidification, solid-state transformations, structural hardening and micro-mechanisms. Calibration of the precipitation and hardening unit step models is conducted based on experimental data available in the literature for aluminium–copper Alloys. Applications are then carried out to study the effects of material and process parameters such as grain size, alloy composition, solidification cooling rate, duration and temperature of the homogenisation and precipitation heat treatments, as well as quenching rate after homogenisation. The effect of the residual volume fraction of eutectic after completion of the solidification and homogenisation treatments is clearly revealed as the main parameter controlling a yield stress knock-down factor.
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Modelling of solidification and heat treatment for the prediction of yield stress of Cast Alloys
La Metallurgia Italiana, 2002Co-Authors: Charles-andré Gandin, Gilles Canova, Michael Ashby, Michel Rappaz, Yves Bréchet, Hugh ShercliffAbstract:A model is developed for the prediction of the microstructure evolution of Cast Alloys during its industrial process route. The materials under consideration are binary aluminium-copper Alloys. The process are Casting, homogenising and ageing. A suite of models is built, which successively calculates microsegregation taking place duríng solidification and homogenisation, and precipitation occurring during ageing of the alloy. As a final output, the model permits the final yield stress of the material to be calculated as a function of the process parameters (i.e., Casting cooling rate, inoculation of the alloy, duration and temperature of the homogenising and ageing heat treatments). This is made possible by introducing a structural hardening model between the diffusion driven phase transformation models and a final mechanical model for heterogeneous materials.