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CFD model of laser additive manufacturing process of cylinders

Author: Tamsaout, T ; Kheloufi, K ; Amara, EH ; Arthur, Nana KK ; Pityana, Sisa L Date: Nov 2017 A theoretical approach based on a numerical simulation using experimental data is proposed as a contribution to the study of laser-based additive manufacturing by direct energy deposition (DED). The aim is to simulate the stages of layer-by-layer ... Read more
The effects of LENS process parameters on the behaviour of 17-4 PH stainless steel

Author: Mathoho, Ipfi ; Akinlabi, ET ; Arthur, Nana KK ; Tlotleng, Monnamme ; Makoana, Nkutwane W Date: Feb 2020 17-4 PH stainless steel has proven to be one of the workhorse materials in industries such as aerospace, chemical, and energy. The attraction of this alloy to the aforementioned industries is derived from the fact that 17-4 PH stainless steel ... Read more
Impact of DED process parameters on the metallurgical characteristicsof 17-4 PH SS deposited using DEDI

Author: Mathoho, I ; Akinlabi, ET ; Arthur, Nana KK ; Tlotleng, Monnamme Date: Aug 2020 This study investigated the influence direct energy deposition (DED) process parameters have on the metallurgical characteristics (porosity, microstructural evolution, microhardness, and corrosion behavior) of 17−4 PH stainless steel powder. ... Read more
In-situ LENS fabricated Ti–Al–Si alloy phase transformation and microstructural evolution after isothermal annealing heat treatments

Author: Raji, SA ; Popoola, API ; Pityana, Sisa L ; Popoola, OM ; Raji, NK ; Tlotleng, Monnamme Date: Feb 2022 Gamma titanium aluminide ( -TiAl) alloys are lightweight materials with potential application for high-temperature components. But their ductility at room temperature impedes widespread production of parts via traditional processing routes. ... Read more
Influence of Mo on microstructure and nanoindentation hardness of Ti-Al-Si-xMo alloy processed by Laser Engineered Net Shaping (LENS)

Author: Raji, SA ; Pityana, Sisa L ; Popoola, API ; Popoola, OM ; Arthur, Nana KK ; Tlotleng, Monnamme Date: Oct 2021 In this work, the microstructure and nanoindentation hardness properties of Ti-Al-Si-xMo alloys produced through laser in-situ alloying using laser engineered net shaping (LENS) technology were investigated. The microstructures and phases ... Read more
Metallurgical characteristics of laser peened 17-4 PH SS processed by LENS technique

Author: Mathoho, Ipfi ; Akinlabi, ET ; Arthur, Nana KK ; Tlotleng, Monnamme ; Masina, Bathusile N Date: Mar 2019 This study investigated the effect of laser peening on the surface integrity (surface roughness, microstructure and microhardness) of 17-4 PH stainless steel components which were built through the direct energy deposition (DED). Additive ... Read more
Microstructural evolution of the LENS manufactured TiAl structure

Author: Lengopeng, T ; Tlotleng, Monnamme ; Pityana, Sisa L Date: Nov 2016 The advent of additive manufacturing presented the new-era where complex structures can be prototype and rapidly manufactured from a computer aided device file. Robust industries such as the aerospace and medicinal require 3D printed complex ... Read more
Microstructural Properties of Heat-Treated LENS In Situ Additively Manufactured Titanium Aluminide

Author: Tlotleng, Monnamme Date: Feb 2019 This study reports on the microstructure, phase identification and hardness property of the LENS-manufactured binary Ti-Al alloy which was achieved via laser in situ alloying. The in situ alloying method, using laser beam as an energy source, ... Read more
Microstructure and material properties of LENS fabricated Ti-6Al-4V components

Author: Arthur, Nana KK ; Pityana, Sisa L Date: Oct 2018 Cylindrical components of dimensions 15 mm in diameter and 11 mm in height were laser printed by additive manufacturing using a LENS!™ system. Process parameters used in layer by layer build-ups showed that energy densities in the range of ... Read more
Microstructure and mechanical properties of heat-treated Ti-Al-Si alloy produced via laser in situ alloying

Author: Raji, SA ; Popoola, API ; Pityana, Sisa L ; Monnamme, Tlotleng Date: Mar 2021 Intermetallics based on gamma titanium aluminide ( -TiAl) alloys are potential lightweight materials that can be used for high-temperature components. However, poor room temperature ductility hinders their full potential for producing components ... Read more
Microstructure and mechanical properties of LENS fabricated TiAl structures

Author: Tlotleng, Monnamme ; Makoana, Nkutwane W ; Pityana, Sisa L ; Masina, Bathusile N Date: Nov 2016 It is difficult to produce titanium aluminides (TiAl) components because these materials lack ductility and when used as high temperature structures they fail prematurely due to the inability to self-oxidise. In this study, a 20 by 20 mm cube ... Read more
Residual stress modelling and experimental analyses of Ti6Al4V ELI additive manufactured by laser engineered net shaping

Author: Ngoveni, AS ; Popoola, API ; Arthur, Nana KK ; Pityana, Sisa L Date: Mar 2019 This paper focus on the experimental analyses and modelling of the residual stresses build up during laser additive manufacturing by Laser Engineered Net Shaping. Currently, additive manufactured parts employ heat treatment for the reduction ... Read more

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Browsing by Subject "LENS"

Browsing by Subject "LENS"

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