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Browsing by Impact Area "Laser Enabled Manufacturing"

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2D numerical model for heat transfer on a laser deposited high entropy alloy baseplate using Comsol Multiphysics

Author: Dada, A ; Popoola, P ; Mathe, Ntombizodwa R ; Adeosun, S ; Aramide, O Date: Dec 2021 In an optimization study, cracks were observed in the microstructures of laser-deposited HEAs on a steel baseplate from residual stresses, thus, the optimization of crack-free microstructures was achieved by the optimization of the laser ... Read more
Addition of Chromium and its effect on the microstructure and mechanical properties of laser- coated high carbon ferrochrome alloy on mild steel

Author: Aramide, BP ; Popoola, P ; Sadiku, R ; Jamiru, T ; Pityana, Sisa L Date: Aug 2021 Laser cladding is an additive manufacturing technology that can be utilized in surface strengthening, modification, and repair of components that are subjected to adverse working conditions. This can be accomplished by the addition of ... Read more
Analysis of dry sliding wear performance of tribaloy T-800/Tungsten carbide coating deposited via laser cladding assisted with preheating

Author: Nyadongo, ST ; Olakanmi, EO ; Pityana, Sisa L Date: Oct 2022 Shafts, gears, axles and crankshafts, which are exposed to severe sliding wear environment, are made from wear resistant EN8 medium carbon steel. The wear resistance of EN8 can be enhanced by depositing it with laser cladding assisted with ... Read more
The comparative study of the microstructural and corrosion behaviour of laser-deposited high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S ; Aramide, O Date: Jun 2021 Corrosion is a conservational occurrence that has a large economic impact on most metals and its alloys because it destroys and deteriorates most materials by an electrochemical process through the reaction of these materials with the ... Read more
Comparison of in situ alloyed Ti-6Al-4V+10Mo via selective laser melting and directed energy deposition

Author: Madikizela, C ; Cornish, LA ; Chown, LH ; Möller, H ; Arthur, Nana KK Date: Nov 2017 In situ alloying is an important topic for alloy development and improvement of mechanical properties in additive manufacturing. With the scarcity of getting most commercial titanium alloys in powder form, development and qualification of ... Read more
Coupled heat transfer, fluid flow and solidification kinetics for laser additive manufacturing applications

Author: Khomenko, MD ; Makoana, Nkutwane W ; Pityana, Sisa L ; Mirzade, FKH Date: Jul 2021 A new coupled heat transfer and solidification kinetics model is developed for the optimization of microstructure during laser additive manufacturing applications. The Johnson–Mehl–Avrami–Kolmogorov equation is applied in a self-consistent ... Read more
Crack mitigation in laser engineered net shaping of WC-10wt%FeCr cemented carbides

Author: Molobi, E ; Sacks, N ; Theron, Maritha Date: Apr 2022 Laser engineered net shaping of a WC-10wt%FeCr cemented carbide showed cracking during deposition despite using a full factorial design of experiments matrix along with single and multiple objective optimization models to establish an optimal ... Read more
Design and simulation of a bearing housing aerospace component from titanium alloy (TI6AL4V) for additive manufacturing

Author: Oyesola, M ; Mpofu, K ; Daniyan, I ; Mathe, Ntombizodwa R Date: Dec 2022 In evaluating emerging technology, such as additive manufacturing, it is important to analyse the impact of the manufacturing process on efficiency in an objective and quantifiable manner. This study deals with the design and simulation of a ... Read more
Development of ideal processing parameters for powder bed fusion system processing of AlSi10Mg using design of experiments

Author: Mathe, Ntombizodwa R Date: Aug 2021 The additive manufacturing of aluminium alloys has gained great interest in the transport industry in the past 10 years. This is mainly due to the lightweight and good strength that these alloys offer especially for applications in aerospace ... Read more
Directed energy deposition of a cemented tungsten carbide rotary burr prototype

Author: Molobi, E ; Sacks, N ; Theron, Maritha Date: Nov 2021 In this study a cemented tungsten carbide rotary burr prototype was fabricated using directed energy deposition based on an optimal parameter set which was previously derived from a full factorial design of experiments matrix approach. Finite ... Read more
Effect of heat treatment on microstructure, hardness and tensile properties of high-speed selective laser melted Ti6Al4V

Author: Lekoadi, Paul M ; Tlotleng, Monnamme ; Annan, K ; Maledi, N ; Masina, Bathusile N Date: Nov 2022 This study presents the investigation of the influence of heat treatment on microstructure, hardness and tensile properties of high-speed selective laser melted Ti6Al4V components. Heat treatment was performed to obtain an improved microstructure ... Read more
Effect of heat treatment temperature on the microstructure and microhardness of TiC/Ti6Al4V composite manufactured with laser metal deposition

Author: Kgoahla, Reneilwe M ; Lekoadi, Paul M ; Masina, Bathusile N Date: Nov 2023 This study presented the investigation of the influence of post heat treatment temperature on the microstructure and hardness of TiC/Ti6Al4V composite manufactured with laser metal deposition. Heat treatment was performed to improve the ... Read more
Effect of laser cladding processing parameters on nitinol’s clad dimensions, microstructure, and hardness

Author: Zain, EM ; Youssef, AF ; Sabbagh, AEI ; Pityana, Sisa L ; Taha, MA Date: Dec 2021 Nickel Titanium alloy (Nitinol) is characterized by its good mechanical properties, good damping properties in addition to its distinctive shape-memory effect and superelasticity effect besides its great bio-mechanical compatibility and ... Read more
The effect of laser shock processing on the anti-corrosion performance of LENS-Fabricated Ti-6Al-4V alloy

Author: Arthur, Nana KK ; Kubjane, SM ; Popoola, API ; Masina, Bathusile N ; Pityana, Sisa L Date: May 2023 Titanium alloys are prone to increased oxidation rates when exposed to higher temperatures during application. As a result, the components suffer mechanical failure due to the formation of the alpha-case layer at 500 °C. To improve its corrosion ... Read more
The effect of laser surface re-melting on the surface roughness and micro-hardness of selective laser melting (SLM) fabricated Ti-6Al-4V samples

Author: Molatlhegi, G ; Hoosain, Shaik ; Popoola, API ; Malatji, N ; Pityana, Sisa L Date: Oct 2021 Ti-6Al-4V is favourable due to its exquisite properties for example, low modulus, light weight, excellent strength, and corrosion resistance. Despite the excellent properties of the material, the fabrication process of titanium components is ... Read more
Effect of LSP parameters on the corrosion and hardness properties of TI6Al4V

Author: Kubjane, SM ; Arthur, Nana KK ; Masina, Bathusile N ; Popoola, API ; Pityana, Sisa L Date: Sep 2019 Because of its low density, high corrosion resistance and high strength to weight ratio, titanium and its alloys are widely used in aerospace applications. As a result, the material is exposed to detrimental environment. An enhancement in ... Read more
The effect of porosity on the mechanical properties of Ti-6Al-4V components manufactured by high-power selective laser melting

Author: Mathe, Ntombizodwa R ; Tshabalala, Lerato C ; Hoosain, Shaik ; Motibane, Londiwe P ; Du Plessis, A Date: Jul 2021 Metal powder bed fusion in additive manufacturing is gaining interest as a manufacturing technique for complex metal parts in the aerospace, rail, and automotive industries. This has led to an emergence of 3D printers in the market to accelerate ... Read more
Effect of powder flowrate on the microstructure of FeCrV15 clad, developed via the laser cladding technique

Author: Aramide, B ; Sadiku, R ; Popoola, P ; Pityana, Sisa L ; Jamiru, T Date: Feb 2022 Steel utilized in mining and tillage devices is highly susceptible to wear and corrosion attacks due to its poor tribological property when presented to unfavorable working conditions common to mining and tillage activities. This leads to an ... Read more
Effects of energy density on the microstructure evolution of TiC/Ti6Al4V-ELI metal composite fabricated with laser metal deposition

Author: Ramasobane, P ; Mashinini, MP ; Masina, Bathusile N Date: Nov 2022 This study investigated the microstructural evolution of Ti6Al4V-ELI reinforced with TiC, fabricated via in-situ laser metal deposition technique. The 3.85% volume fraction TiC/Ti6Al4V-ELI metal composite samples were fabricated at two different ... Read more
Effects of laser shock peening on the mechanisms of fatigue short crack initiation and propagation of AA7075-T651

Author: Sanchez, AG ; You, C ; Leering, M ; Glaser, Daniel ; Furfari, D ; Fitzpatrick, ME ; Wharton, J ; Reed, PAS Date: Nov 2020 A laser shock peening (LSP) treatment was performed on AA7075-T651 for maximum fatigue improvement. Surface and microstructural characterisation techniques (micro-hardness, SEM-EBSD, contact-profilometry) showed LSP surface modification was ... Read more

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