Browsing by Author "Akinlabi, E. T."
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Item Additive Manufacturing: Laser Metal Deposition and effect of Preheating on properties of deposited Ti-4822-4 alloy(IGI Global, 2019) Abdulrahman, K. O.; Akinlabi, E. T.; Mahamood, R. M.Three-dimensional printing has evolved into an advanced laser additive manufacturing (AM) process with capacity of directly producing parts through CAD model. AM technology parts are fabricated through layer by layer build-up additive process. AM technology cuts down material wastage, reduces buy-to-fly ratio, fabricates complex parts, and repairs damaged old functional components. Titanium aluminide alloys fall under the group of intermetallic compounds known for high temperature applications and display of superior physical and mechanical properties, which made them most sort after in the aeronautic, energy, and automobile industries. Laser metal deposition is an AM process used in the repair and fabrication of solid components but sometimes associated with thermal induced stresses which sometimes led to cracks in deposited parts. This chapter looks at some AM processes with more emphasis on laser metal deposition technique, effect of LMD processing parameters, and preheating of substrate on the physical, microstructural, and mechanical properties of components produced through AM process.Item Laser Metal Deposition of Titanium Aluminide Composites: A Review(Elsevier-Materials Today, 2018) Abdulrahman, K. O.; Akinlabi, E. T.; Mahamood, R. M.; Pityana, S.; Tlotleng, M.Development of additive manufacturing (AM) from three dimensional printers with ability of producing parts having no need for tooling continue to wax stronger in the manufacturing field. Laser metal deposition, a technique in AM is usually employed to create solid components from model of computer aided design (CAD). Feeding powder supported by shielding gas employed by this technique, is injected into a melt pool produced by accurately focused laser beam on a substrate. This paper discusses some of the AM technologies available, review on laser metal deposition of titanium aluminide on other metals and alloys, relationship between the processing parameters and structural and mechanical properties of products produced, limitation as regards to the processing parameters employed, applications and possible recommendations. © 2018 Elsevier Ltd. All rights reserved.Item Laser Metal Deposition Technique: Sustainability and environmental Impact(Elsevier-Procedia Manufacturing, 2018) Abdulrahman, K. O.; Akinlabi, E. T.; Mahamood, R. M.Additive manufacturing (AM) is a term used in describing a set of manufacturing techniques that employs layer upon layer production of parts and components through the application of 3D model data and inputs of raw material. The technology easily comes to mind in the recent times as processing complexities during production is partly responsible for the high cost of parts and components. Industries such as the heavy machinery consumers, aerospace and casting industry now employs the technology as a way of prolonging service of faulty parts through repair and remanufacturing technology. AM has the tendency to change many production set ups through reduction in cost of production, material wastage, energy usage, component lead time etc. AM technologies also have their own challenges despite numerous advantages associated with them. This paper looks at some of the laser metal deposition techniques, their sustainability and environmental impact.Item Manufacturing of aluminium composite materials: A review. In Hierarchical composite materials: Materials, Manufacturing and Engineering(Walter de Gruyter, 2018) Abdulrahman, K. O.; Akinlabi, E. T.; Mahamood, R. M.Item Production of biodegradable composites from agricultural waste: A review.(Walter de Gruyter, 2019) Dada, O. R.; Abdulrahman, K. O.; Akinlabi, E. T.The development of biodegradable composite as an alternative to nondegradable composite continues to wax stronger. Composite materials are materials popularly formed from the combination of matrix and reinforcements, where one of these is commonly from renewable sources. However, biodegradable composites are produced from the combination of matrix (resin) and reinforcement solely from natural fibers unlike ordinary composites that do contain synthetic polymers which are not biodegradable. Thus, studies are continued to produce biodegradable composites using different biodegradable materials and techniques. Recent activities have led to the development of biodegradable composites with reasonable tensile and flexural characteristics. However, there are shortfalls with regard to some of the biodegradable composites when they come in contact with moisture, which affects their performance under certain conditions as in aqueous medium or under high humidity. Notable works have come up with biodegradable composite materials from common agricultural wastes. Among the common materials that have been studied in the development of biodegradable composites are rice husk, soybean, sugarcane bagasse, and cassava peel. This chapter discusses some of the literature available on biodegradable composites developed mainly from common agricultural products, their properties, production method, challenges, and sustainability.