ABSTRACT A MoS2/titanium coating has been developed in order to improve the mechanical and tribol... more ABSTRACT A MoS2/titanium coating has been developed in order to improve the mechanical and tribological characteristics of pure MoS2. These coatings were produced by physical vapour deposition closed field unbalanced magnetron sputtering on stainless steel substrates. In this work, a comparative study of the mechanical and tribological characteristics of both coatings is carried out. The coating hardness and Young's modulus have been determined by means of an ultramicroindenter. The friction and wear tests have been carried out with a pin on disc tribometer in several conditions of load and humidity. The MoS2/titanium coating exhibited a better mechanical and tribological behaviour in comparison with pure MoS2 coating on increasing the percentage of humidity.
An A356 aluminium alloy manufactured in semisolid state by Sub Liquidus Casting technology (SLC) ... more An A356 aluminium alloy manufactured in semisolid state by Sub Liquidus Casting technology (SLC) has been investigated. The Temperature ant times effect in age hardening (T5 and T6 treatments) has been analyzed, to optimise mechanical properties. The material was characterized by optical and electronic microscopy, hardness test and tensile test. The fracture mechanisms have been determinated by fractographic analysis. () Centro de Diseno de Aleaciones Ligeras y Tratamientos de Superficie (CDAL) Departamento de Ciencia de los Materiales e Ingenieria Metalurgica UPC Avda. Victor Balaguer s/n. 08800 Vilanova i la Geltru (Barcelona)
En este trabajo se ha estudiado el efecto del tratamiento de anodizado en las propiedades superfi... more En este trabajo se ha estudiado el efecto del tratamiento de anodizado en las propiedades superficiales de componentes AlSi conformados en estado semisolido. Los componentes fueron conformados mediante una maquina de inyeccion a alta presion y una estacion Idra de Semi Solid Rheocasting (SSR), empleando una aleacion de segunda fusion EN AC- 46500. Las muestras se trataron termicamente con el objetivo de modificar la forma y la distribucion del silicio eutectico, y posteriormente fueron granalladas para obtener distintas rugosidades. Finalmente, los componentes fueron anodizados con el proposito de mejorar sus propiedades tribologicas y la resistencia a la corrosion. Para ello, se llevaron a cabo antes y despues del proceso de anodizado, ensayos de desgaste con un tribometro Pin on disc y ensayos acelerados de corrosion en niebla salino-acetica. Los componentes anodizados muestran una mejora significativa de la resistencia a la corrosion y resistencia al desgaste en las condiciones e...
This work demonstrates the possibility to apply T5 and T6 heat treatments to L-2630 aluminium com... more This work demonstrates the possibility to apply T5 and T6 heat treatments to L-2630 aluminium components conformed by Semi-Solid Rheocasting (SSR). The study of temperature and time effect in annealing, tempering and artificial aging conditions, has permitted to optimize the component mechanical properties. The experimentation has been accomplished by means of hardness Brinell tests, tensile tests, optic and electronic microscopy, and fractographic analysis. The mechanical properties obtained in SSR components, reach analogous values to the ones obtained by die cast components and submitted to the same heat treatments. () Centro de Diseno de Aleaciones Ligeras y Tratamientos de Superficies, Universitat Politecnica de Catalunya, Espana manel.campillo@upc.edu, maite.baile@upc.edu, enric.martin@upc.edu, antonio.forn@upc.edu.
A comparative study was performed on the corrosion behavior of a component of A380 aluminium allo... more A comparative study was performed on the corrosion behavior of a component of A380 aluminium alloy obtained by Semi-Solid Rheocasting (SSR). The effect of heat treatments T5 and T6 on corrosion resistance was compared with components without heat treatment by SSR processes. Corrosion studies were performed using an acetic acid salt spray test, impedance measurements and polarization curves using a
The study compares the mechanical and fracture behaviour of several AlSiMg automotive components ... more The study compares the mechanical and fracture behaviour of several AlSiMg automotive components in as-casted state and after T5 and T6 heat treatments. The components were manufactured using different semi- solid technologies: Thixocasting (TC), New Rheocasting (NRC) and Sub Liquidus Casting (SLC). The results layout the possibilities of these technologies as an alternative to cast-ironed components.
ABSTRACT A MoS2/titanium coating has been developed in order to improve the mechanical and tribol... more ABSTRACT A MoS2/titanium coating has been developed in order to improve the mechanical and tribological characteristics of pure MoS2. These coatings were produced by physical vapour deposition closed field unbalanced magnetron sputtering on stainless steel substrates. In this work, a comparative study of the mechanical and tribological characteristics of both coatings is carried out. The coating hardness and Young's modulus have been determined by means of an ultramicroindenter. The friction and wear tests have been carried out with a pin on disc tribometer in several conditions of load and humidity. The MoS2/titanium coating exhibited a better mechanical and tribological behaviour in comparison with pure MoS2 coating on increasing the percentage of humidity.
An A356 aluminium alloy manufactured in semisolid state by Sub Liquidus Casting technology (SLC) ... more An A356 aluminium alloy manufactured in semisolid state by Sub Liquidus Casting technology (SLC) has been investigated. The Temperature ant times effect in age hardening (T5 and T6 treatments) has been analyzed, to optimise mechanical properties. The material was characterized by optical and electronic microscopy, hardness test and tensile test. The fracture mechanisms have been determinated by fractographic analysis. () Centro de Diseno de Aleaciones Ligeras y Tratamientos de Superficie (CDAL) Departamento de Ciencia de los Materiales e Ingenieria Metalurgica UPC Avda. Victor Balaguer s/n. 08800 Vilanova i la Geltru (Barcelona)
En este trabajo se ha estudiado el efecto del tratamiento de anodizado en las propiedades superfi... more En este trabajo se ha estudiado el efecto del tratamiento de anodizado en las propiedades superficiales de componentes AlSi conformados en estado semisolido. Los componentes fueron conformados mediante una maquina de inyeccion a alta presion y una estacion Idra de Semi Solid Rheocasting (SSR), empleando una aleacion de segunda fusion EN AC- 46500. Las muestras se trataron termicamente con el objetivo de modificar la forma y la distribucion del silicio eutectico, y posteriormente fueron granalladas para obtener distintas rugosidades. Finalmente, los componentes fueron anodizados con el proposito de mejorar sus propiedades tribologicas y la resistencia a la corrosion. Para ello, se llevaron a cabo antes y despues del proceso de anodizado, ensayos de desgaste con un tribometro Pin on disc y ensayos acelerados de corrosion en niebla salino-acetica. Los componentes anodizados muestran una mejora significativa de la resistencia a la corrosion y resistencia al desgaste en las condiciones e...
This work demonstrates the possibility to apply T5 and T6 heat treatments to L-2630 aluminium com... more This work demonstrates the possibility to apply T5 and T6 heat treatments to L-2630 aluminium components conformed by Semi-Solid Rheocasting (SSR). The study of temperature and time effect in annealing, tempering and artificial aging conditions, has permitted to optimize the component mechanical properties. The experimentation has been accomplished by means of hardness Brinell tests, tensile tests, optic and electronic microscopy, and fractographic analysis. The mechanical properties obtained in SSR components, reach analogous values to the ones obtained by die cast components and submitted to the same heat treatments. () Centro de Diseno de Aleaciones Ligeras y Tratamientos de Superficies, Universitat Politecnica de Catalunya, Espana manel.campillo@upc.edu, maite.baile@upc.edu, enric.martin@upc.edu, antonio.forn@upc.edu.
A comparative study was performed on the corrosion behavior of a component of A380 aluminium allo... more A comparative study was performed on the corrosion behavior of a component of A380 aluminium alloy obtained by Semi-Solid Rheocasting (SSR). The effect of heat treatments T5 and T6 on corrosion resistance was compared with components without heat treatment by SSR processes. Corrosion studies were performed using an acetic acid salt spray test, impedance measurements and polarization curves using a
The study compares the mechanical and fracture behaviour of several AlSiMg automotive components ... more The study compares the mechanical and fracture behaviour of several AlSiMg automotive components in as-casted state and after T5 and T6 heat treatments. The components were manufactured using different semi- solid technologies: Thixocasting (TC), New Rheocasting (NRC) and Sub Liquidus Casting (SLC). The results layout the possibilities of these technologies as an alternative to cast-ironed components.
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