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Muslim Mahardika - One of the best experts on this subject based on the ideXlab platform.
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influence of Grit Blasting treatment using steel slag balls on the subsurface microhardness surface characteristics and chemical composition of medical grade 316l stainless steel
Surface & Coatings Technology, 2012Co-Authors: Budi Arifvianto, K Wibisono A Suyitno, Muslim MahardikaAbstract:Abstract Slag is a residue from the steel making processes which is at present still considered as an industrial waste due to its low utility. In this paper, the spherical steel slag balls obtained from the slag atomization process are evaluated for use in Grit Blasting treatment of medical grade 316L stainless steel. The modification in subsurface microhardness, surface characteristics (morphology, roughness, mass loss) and chemical composition of the stainless steel after the Grit Blasting treatment with these particles is examined. The Blasting treatment was carried out for 5–20 min using steel slag balls with a size of 1–2 mm in diameter and 0.7 MPa compressed air flow in normal direction toward the surface of the specimen. The result shows the increasing subsurface microhardness, surface irregularity and roughness of the stainless steel by this treatment. Surface material removal takes place as well during the Blasting treatment as indicated by the mass loss of the specimen. The mechanisms of the subsurface microhardness modification as well as those for the surface roughness and mass loss evolution during the Grit Blasting treatment are elucidated in this paper. The Blasting treatment with the steel slag balls also introduces some bioactive elements such as Ca, Si and Mg on the specimen surface. In conclusion, the Grit Blasting treatment using the steel slag balls has potential for improving mechanical properties and bioactivity of stainless steel based biomedical implants.
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Influence of Grit Blasting treatment using steel slag balls on the subsurface microhardness, surface characteristics and chemical composition of medical grade 316L stainless steel
Surface and Coatings Technology, 2012Co-Authors: Budi Arifvianto, Suyitno K.a. Wibisono, Muslim MahardikaAbstract:Slag is a residue from the steel making processes which is at present still considered as an industrial waste due to its low utility. In this paper, the spherical steel slag balls obtained from the slag atomization process are evaluated for use in Grit Blasting treatment of medical grade 316L stainless steel. The modification in subsurface microhardness, surface characteristics (morphology, roughness, mass loss) and chemical composition of the stainless steel after the Grit Blasting treatment with these particles is examined. The Blasting treatment was carried out for 5-20. min using steel slag balls with a size of 1-2. mm in diameter and 0.7. MPa compressed air flow in normal direction toward the surface of the specimen. The result shows the increasing subsurface microhardness, surface irregularity and roughness of the stainless steel by this treatment. Surface material removal takes place as well during the Blasting treatment as indicated by the mass loss of the specimen. The mechanisms of the subsurface microhardness modification as well as those for the surface roughness and mass loss evolution during the Grit Blasting treatment are elucidated in this paper. The Blasting treatment with the steel slag balls also introduces some bioactive elements such as Ca, Si and Mg on the specimen surface. In conclusion, the Grit Blasting treatment using the steel slag balls has potential for improving mechanical properties and bioactivity of stainless steel based biomedical implants. © 2012 Elsevier B.V.
Z Mohammadi - One of the best experts on this subject based on the ideXlab platform.
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Grit Blasting of ti 6al 4v alloy optimization and its effect on adhesion strength of plasma sprayed hydroxyapatite coatings
Journal of Materials Processing Technology, 2007Co-Authors: Z Mohammadi, A A Ziaeimoayyed, Sheikhmehdi A MesgarAbstract:Abstract The effect of Grit Blasting parameters on the surface roughness of Ti–6Al–4V alloy as the substrate for plasma-sprayed hydroxyapatite (HA) coatings was examined using the factorial and Taguchi designs of experiments. In this study, two Grit materials (Al 2 O 3 and SiO 2 ) each at two sizes, and two types of Blasting systems (pressure and suction) were used. An equivalent surface roughness of 3.51 μm was obtained in three optimum conditions. The results of the Taguchi designed experiments were analyzed using signal to noise ratio. The tensile bonding strength of HA coatings deposited on the roughened substrates at the three different optimum conditions was measured by the standard adhesion test (ISO 13779-4). As the crystallinity of the coating at the interface, evaluated by the XRD analysis, reduced the bonding strength of the coatings was increased. These findings suggest that the substrate surface topography significantly influences the properties of the coating at the interface.
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Grit Blasting of Ti–6Al–4V alloy: Optimization and its effect on adhesion strength of plasma-sprayed hydroxyapatite coatings
Journal of Materials Processing Technology, 2007Co-Authors: Z Mohammadi, A.a. Ziaei-moayyed, A. Sheikh-mehdi MesgarAbstract:Abstract The effect of Grit Blasting parameters on the surface roughness of Ti–6Al–4V alloy as the substrate for plasma-sprayed hydroxyapatite (HA) coatings was examined using the factorial and Taguchi designs of experiments. In this study, two Grit materials (Al 2 O 3 and SiO 2 ) each at two sizes, and two types of Blasting systems (pressure and suction) were used. An equivalent surface roughness of 3.51 μm was obtained in three optimum conditions. The results of the Taguchi designed experiments were analyzed using signal to noise ratio. The tensile bonding strength of HA coatings deposited on the roughened substrates at the three different optimum conditions was measured by the standard adhesion test (ISO 13779-4). As the crystallinity of the coating at the interface, evaluated by the XRD analysis, reduced the bonding strength of the coatings was increased. These findings suggest that the substrate surface topography significantly influences the properties of the coating at the interface.
Budi Arifvianto - One of the best experts on this subject based on the ideXlab platform.
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influence of Grit Blasting treatment using steel slag balls on the subsurface microhardness surface characteristics and chemical composition of medical grade 316l stainless steel
Surface & Coatings Technology, 2012Co-Authors: Budi Arifvianto, K Wibisono A Suyitno, Muslim MahardikaAbstract:Abstract Slag is a residue from the steel making processes which is at present still considered as an industrial waste due to its low utility. In this paper, the spherical steel slag balls obtained from the slag atomization process are evaluated for use in Grit Blasting treatment of medical grade 316L stainless steel. The modification in subsurface microhardness, surface characteristics (morphology, roughness, mass loss) and chemical composition of the stainless steel after the Grit Blasting treatment with these particles is examined. The Blasting treatment was carried out for 5–20 min using steel slag balls with a size of 1–2 mm in diameter and 0.7 MPa compressed air flow in normal direction toward the surface of the specimen. The result shows the increasing subsurface microhardness, surface irregularity and roughness of the stainless steel by this treatment. Surface material removal takes place as well during the Blasting treatment as indicated by the mass loss of the specimen. The mechanisms of the subsurface microhardness modification as well as those for the surface roughness and mass loss evolution during the Grit Blasting treatment are elucidated in this paper. The Blasting treatment with the steel slag balls also introduces some bioactive elements such as Ca, Si and Mg on the specimen surface. In conclusion, the Grit Blasting treatment using the steel slag balls has potential for improving mechanical properties and bioactivity of stainless steel based biomedical implants.
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Influence of Grit Blasting treatment using steel slag balls on the subsurface microhardness, surface characteristics and chemical composition of medical grade 316L stainless steel
Surface and Coatings Technology, 2012Co-Authors: Budi Arifvianto, Suyitno K.a. Wibisono, Muslim MahardikaAbstract:Slag is a residue from the steel making processes which is at present still considered as an industrial waste due to its low utility. In this paper, the spherical steel slag balls obtained from the slag atomization process are evaluated for use in Grit Blasting treatment of medical grade 316L stainless steel. The modification in subsurface microhardness, surface characteristics (morphology, roughness, mass loss) and chemical composition of the stainless steel after the Grit Blasting treatment with these particles is examined. The Blasting treatment was carried out for 5-20. min using steel slag balls with a size of 1-2. mm in diameter and 0.7. MPa compressed air flow in normal direction toward the surface of the specimen. The result shows the increasing subsurface microhardness, surface irregularity and roughness of the stainless steel by this treatment. Surface material removal takes place as well during the Blasting treatment as indicated by the mass loss of the specimen. The mechanisms of the subsurface microhardness modification as well as those for the surface roughness and mass loss evolution during the Grit Blasting treatment are elucidated in this paper. The Blasting treatment with the steel slag balls also introduces some bioactive elements such as Ca, Si and Mg on the specimen surface. In conclusion, the Grit Blasting treatment using the steel slag balls has potential for improving mechanical properties and bioactivity of stainless steel based biomedical implants. © 2012 Elsevier B.V.
Sheikhmehdi A Mesgar - One of the best experts on this subject based on the ideXlab platform.
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Grit Blasting of ti 6al 4v alloy optimization and its effect on adhesion strength of plasma sprayed hydroxyapatite coatings
Journal of Materials Processing Technology, 2007Co-Authors: Z Mohammadi, A A Ziaeimoayyed, Sheikhmehdi A MesgarAbstract:Abstract The effect of Grit Blasting parameters on the surface roughness of Ti–6Al–4V alloy as the substrate for plasma-sprayed hydroxyapatite (HA) coatings was examined using the factorial and Taguchi designs of experiments. In this study, two Grit materials (Al 2 O 3 and SiO 2 ) each at two sizes, and two types of Blasting systems (pressure and suction) were used. An equivalent surface roughness of 3.51 μm was obtained in three optimum conditions. The results of the Taguchi designed experiments were analyzed using signal to noise ratio. The tensile bonding strength of HA coatings deposited on the roughened substrates at the three different optimum conditions was measured by the standard adhesion test (ISO 13779-4). As the crystallinity of the coating at the interface, evaluated by the XRD analysis, reduced the bonding strength of the coatings was increased. These findings suggest that the substrate surface topography significantly influences the properties of the coating at the interface.
Pablo Sevilla - One of the best experts on this subject based on the ideXlab platform.
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fatigue life of bioactive titanium dental implants treated by means of Grit Blasting and thermo chemical treatment
Clinical Implant Dentistry and Related Research, 2014Co-Authors: E Espinar, Jose Maria Llamas, Pablo SevillaAbstract:Objective: This study focuses on the fatigue behavior of titanium dental implants as-received, with a Grit-blasted surface and with a new bioactive surface treatment (2Steps). Background: The 2Step process consists of (1) an initial Grit-Blasting process to produce a micro-rough surface, followed by (2) a combined thermo-chemical treatment that produces a potentially bioactive surface, that is, that can form an apatitic layer when exposed to biomimetic conditions in vitro. The 2Step treatment produced micro-rough and apatitic coating implants. Methods: Residual stresses were determined by means of X-ray diffraction. The fatigue tests were carried out at 37°C on 500 dental implants, and the S-N curve was determined. The fatigue-crack nucleation for the different treatments was analyzed. Results: The fatigue tests show that the Grit-Blasting process improves the fatigue life. This is a consequence of the layer of compressive residual stresses that the treatment generates in titanium surfaces. Dental implants that had its surfaced prepared with the 2Step procedure (Grit-Blasting and thermo-chemical treatment) had its fatigue life decreased by 10% due to the incorporation of oxygen to the surface and the relaxation of the compressive residual stress produced by the heat treatment. Conclusions: Thermo-chemical treatment is an excellent compromise between the improvement of bioactive and mechanical long-life behaviors.
