Fabrication of forced air cool austempered ductile iron and exploring its corrosion behaviour in a simulated mine water
- Ige, Oladeji O., Olawale, Oluyemi J., Oluwasegun, Kunle M., Aribo, Sunday, Obadele, Babatunde A., Olubambi, Peter A.
- Authors: Ige, Oladeji O. , Olawale, Oluyemi J. , Oluwasegun, Kunle M. , Aribo, Sunday , Obadele, Babatunde A. , Olubambi, Peter A.
- Date: 2017
- Subjects: Austempering process , Forced air cool quenching , Austempered ductile iron
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/217627 , uj:21663 , Citation: Ige, O.O. et al. 2017. Fabrication of forced air cool austempered ductile iron and exploring its corrosion behaviour in a simulated mine water. International Conference on Sustainable Materials Processing and Manufacturing, SMPM 2017, 23-25 January 2017, Kruger National Park
- Description: Abstract: The production of austempered ductile iron (ADI) with uniform microstructure and properties is constrained by the austempering process vis-à-vis the quenching medium. This is as a result of the stringent operating parameters with costly facilities. This limitation has restricted the application of ADI, despite its inherent mechanical and chemical properties. An emerging technology of overcoming this limitation is by austempering with force air cooling equipment, which is accessible, available and cost-efficient. This work characterizes the behaviour of the forced air cool ADI in simulated mine water due to the strategic importance of the mining industry in the global economy. The study establishes the influence of sample section thickness on the corrosion performance. The sample’s thickness were 5, 15, and 20 mm. Electrochemical experiments were performed on the forced air cool ADI at atmospheric pressure and room temperature with method such as open circuit potential (OCP). The post-corrosion analyses were performed using X-ray diffractometry (XRD) and field emission scanning electron microscopy (FESEM). The research highlighted that small section thickness has a more favourable performance compared with larger section. Consideration is also accorded to the capability of the ADI in the studied environment.
- Full Text:
- Authors: Ige, Oladeji O. , Olawale, Oluyemi J. , Oluwasegun, Kunle M. , Aribo, Sunday , Obadele, Babatunde A. , Olubambi, Peter A.
- Date: 2017
- Subjects: Austempering process , Forced air cool quenching , Austempered ductile iron
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/217627 , uj:21663 , Citation: Ige, O.O. et al. 2017. Fabrication of forced air cool austempered ductile iron and exploring its corrosion behaviour in a simulated mine water. International Conference on Sustainable Materials Processing and Manufacturing, SMPM 2017, 23-25 January 2017, Kruger National Park
- Description: Abstract: The production of austempered ductile iron (ADI) with uniform microstructure and properties is constrained by the austempering process vis-à-vis the quenching medium. This is as a result of the stringent operating parameters with costly facilities. This limitation has restricted the application of ADI, despite its inherent mechanical and chemical properties. An emerging technology of overcoming this limitation is by austempering with force air cooling equipment, which is accessible, available and cost-efficient. This work characterizes the behaviour of the forced air cool ADI in simulated mine water due to the strategic importance of the mining industry in the global economy. The study establishes the influence of sample section thickness on the corrosion performance. The sample’s thickness were 5, 15, and 20 mm. Electrochemical experiments were performed on the forced air cool ADI at atmospheric pressure and room temperature with method such as open circuit potential (OCP). The post-corrosion analyses were performed using X-ray diffractometry (XRD) and field emission scanning electron microscopy (FESEM). The research highlighted that small section thickness has a more favourable performance compared with larger section. Consideration is also accorded to the capability of the ADI in the studied environment.
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Wear and corrosion of wrought a6061 aluminium alloy in dot3 brake fluid
- Ajibola, Olawale O., Ige, Oladeji O., Olubambi, Peter A.
- Authors: Ajibola, Olawale O. , Ige, Oladeji O. , Olubambi, Peter A.
- Date: 2018
- Subjects: Hydraulic Brake Fluid , Piston Application , Wear
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/263343 , uj:27838 , Citation: Ajibola, O.O., Ige, O.O. & Olubambi, P.A. 2018. Wear and corrosion of wrought a6061 aluminium alloy in dot3 brake fluid. International Journal of Engineering & Technology, 7 (2):512-519.
- Description: Abstract: The twofold impact of wear and corrosion on wrought A6061 alloy in hydraulic DOT3 brake fluid environment was studied. The wear studies were performed on the samples using a developed wear-jig. Weight loss corrosion test method was used to determine the corrosion rate of the wrought A6061 alloy samples immersed in the brake fluid for a total of 1680 hours. From the results of wear tests carried out on the A6061 alloy sample with brake oil, the highest wear value of 5.24x10-7 mg/mm2/cycle (approx.) was obtained from 6 N (approx) force after 130 minutes. The wrought A6061 alloy material demonstrated the highest corrosion rates nearly 3.0 x10-2 mg/mm2/yr within the early 168 hours of immersion in brake fluid. The result is practically lower than the corrosion rate of cast specimen in DOT3 brake oil or some other alloys immersed in other corrosive media that were previously reported in the literature. The results show that small amount of chemical corrosion is sufficient to cause and accelerate mechanical wear of the material in usage.
- Full Text:
- Authors: Ajibola, Olawale O. , Ige, Oladeji O. , Olubambi, Peter A.
- Date: 2018
- Subjects: Hydraulic Brake Fluid , Piston Application , Wear
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/263343 , uj:27838 , Citation: Ajibola, O.O., Ige, O.O. & Olubambi, P.A. 2018. Wear and corrosion of wrought a6061 aluminium alloy in dot3 brake fluid. International Journal of Engineering & Technology, 7 (2):512-519.
- Description: Abstract: The twofold impact of wear and corrosion on wrought A6061 alloy in hydraulic DOT3 brake fluid environment was studied. The wear studies were performed on the samples using a developed wear-jig. Weight loss corrosion test method was used to determine the corrosion rate of the wrought A6061 alloy samples immersed in the brake fluid for a total of 1680 hours. From the results of wear tests carried out on the A6061 alloy sample with brake oil, the highest wear value of 5.24x10-7 mg/mm2/cycle (approx.) was obtained from 6 N (approx) force after 130 minutes. The wrought A6061 alloy material demonstrated the highest corrosion rates nearly 3.0 x10-2 mg/mm2/yr within the early 168 hours of immersion in brake fluid. The result is practically lower than the corrosion rate of cast specimen in DOT3 brake oil or some other alloys immersed in other corrosive media that were previously reported in the literature. The results show that small amount of chemical corrosion is sufficient to cause and accelerate mechanical wear of the material in usage.
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Wear and Corrosion of Wrought A6061 Aluminium Alloy in DOT3 Brake Fluid
- Ajibola, Olawale O., Ige, Oladeji O., Olubambi, Peter A.
- Authors: Ajibola, Olawale O. , Ige, Oladeji O. , Olubambi, Peter A.
- Date: 2018
- Subjects: Hydraulic Brake Fluid , Piston Application , Wear
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/279684 , uj:30040 , Citation: Ajibola, O.O., Ige, O.O. & Olubambi, P.A. 2018. Wear and Corrosion of Wrought A6061 Aluminium Alloy in DOT3 Brake Fluid. International Journal of Engineering & Technology, 7 (2) (2018):512-519.
- Description: Abstract: The twofold impact of wear and corrosion on wrought A6061 alloy in hydraulic DOT3 brake fluid environment was studied. The wear studies were performed on the samples using a developed wear-jig. Weight loss corrosion test method was used to determine the corrosion rate of the wrought A6061 alloy samples immersed in the brake fluid for a total of 1680 hours. From the results of wear tests carried out on the A6061 alloy sample with brake oil, the highest wear value of 5.24x10-7 mg/mm2/cycle (approx.) was obtained from 6 N (approx) force after 130 minutes. The wrought A6061 alloy material demonstrated the highest corrosion rates nearly 3.0 x10-2 mg/mm2/yr within the early 168 hours of immersion in brake fluid. The result is practically lower than the corrosion rate of cast specimen in DOT3 brake oil or some other alloys immersed in other corrosive media that were previously reported in the literature. The results show that small amount of chemical corrosion is sufficient to cause and accelerate mechanical wear of the material in usage.
- Full Text:
- Authors: Ajibola, Olawale O. , Ige, Oladeji O. , Olubambi, Peter A.
- Date: 2018
- Subjects: Hydraulic Brake Fluid , Piston Application , Wear
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/279684 , uj:30040 , Citation: Ajibola, O.O., Ige, O.O. & Olubambi, P.A. 2018. Wear and Corrosion of Wrought A6061 Aluminium Alloy in DOT3 Brake Fluid. International Journal of Engineering & Technology, 7 (2) (2018):512-519.
- Description: Abstract: The twofold impact of wear and corrosion on wrought A6061 alloy in hydraulic DOT3 brake fluid environment was studied. The wear studies were performed on the samples using a developed wear-jig. Weight loss corrosion test method was used to determine the corrosion rate of the wrought A6061 alloy samples immersed in the brake fluid for a total of 1680 hours. From the results of wear tests carried out on the A6061 alloy sample with brake oil, the highest wear value of 5.24x10-7 mg/mm2/cycle (approx.) was obtained from 6 N (approx) force after 130 minutes. The wrought A6061 alloy material demonstrated the highest corrosion rates nearly 3.0 x10-2 mg/mm2/yr within the early 168 hours of immersion in brake fluid. The result is practically lower than the corrosion rate of cast specimen in DOT3 brake oil or some other alloys immersed in other corrosive media that were previously reported in the literature. The results show that small amount of chemical corrosion is sufficient to cause and accelerate mechanical wear of the material in usage.
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Wear behaviour of cast aluminium silicon (Al-Si) alloy in Dot 4 brake fluid
- Ajibola, Olawale O., Aribo, Sunday, Ige, Oladeji O., Akinribide, Ojo J., Akinwamide, Samuel O., Olubambi, Peter A.
- Authors: Ajibola, Olawale O. , Aribo, Sunday , Ige, Oladeji O. , Akinribide, Ojo J. , Akinwamide, Samuel O. , Olubambi, Peter A.
- Date: 2019
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/403851 , uj:33858 , Citation: Olawale O Ajibola et al 2019 IOP Conf. Ser.: Mater. Sci. Eng. 628 012012
- Description: Abstract: The frictional sliding behaviour of cast Al-Si alloy was investigated with and without DOT 4 hydraulic brake fluid lubrication/environments. Cast Al-Si specimen was produced from wrought alloy and the specimen surface was metallurgically prepared. The ascast product was characterized with aid of micro-hardness tester, the chemical composition was analysed by X-ray fluorescence (XRF), while X-ray diffraction (XRD) was used to identify phases present, microstructures and surface examinations were done on a high resolution metallurgical Optical Microscope. The properties of the polished and worn sample surfaces were examined by Scanning electron microscope (SEM) equipped with Energy dispersive Xray (EDS) facilities. A 6mm diameter alumina ball under varying normal loads (3-10 N) was rubbed against the surface of the cast Al-Si coupon specimen. The dry and wet sliding wear behaviour was assessed based on the CoF-sliding time behaviour. From the results, the average CoF values of 0.9064 for dry and 0.2038 for wet contacts were obtained. Comparatively, 1.03E-06 and 4.21E-07 minimum wear intensities; and 467290 and 132170 wear resistances were obtained for dry and wet contacts respectively. Behaviour of cast Al-Si in DOT4 were compared with its performance in DOT3 regarding the hydraulic brake system application.
- Full Text:
- Authors: Ajibola, Olawale O. , Aribo, Sunday , Ige, Oladeji O. , Akinribide, Ojo J. , Akinwamide, Samuel O. , Olubambi, Peter A.
- Date: 2019
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/403851 , uj:33858 , Citation: Olawale O Ajibola et al 2019 IOP Conf. Ser.: Mater. Sci. Eng. 628 012012
- Description: Abstract: The frictional sliding behaviour of cast Al-Si alloy was investigated with and without DOT 4 hydraulic brake fluid lubrication/environments. Cast Al-Si specimen was produced from wrought alloy and the specimen surface was metallurgically prepared. The ascast product was characterized with aid of micro-hardness tester, the chemical composition was analysed by X-ray fluorescence (XRF), while X-ray diffraction (XRD) was used to identify phases present, microstructures and surface examinations were done on a high resolution metallurgical Optical Microscope. The properties of the polished and worn sample surfaces were examined by Scanning electron microscope (SEM) equipped with Energy dispersive Xray (EDS) facilities. A 6mm diameter alumina ball under varying normal loads (3-10 N) was rubbed against the surface of the cast Al-Si coupon specimen. The dry and wet sliding wear behaviour was assessed based on the CoF-sliding time behaviour. From the results, the average CoF values of 0.9064 for dry and 0.2038 for wet contacts were obtained. Comparatively, 1.03E-06 and 4.21E-07 minimum wear intensities; and 467290 and 132170 wear resistances were obtained for dry and wet contacts respectively. Behaviour of cast Al-Si in DOT4 were compared with its performance in DOT3 regarding the hydraulic brake system application.
- Full Text:
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