• Parametric optimization of laser deposited high entropy alloys using response surface methodology (RSM) 

  Dada, M; Popoola, P; Mathe, Ntombizodwa R; Pityana, Sisa L; Adeosun, S (Springer, 2020-08)

  In this study, a full-factorial design of experiments was systematically structured to optimize the laser processing parameters of additively manufactured high entropy alloys by determining the impact of these parameters ...
• Effect of laser parameters on the properties of high entropy alloys: A preliminary study 

  Dada, M; Popoola, P; Mathe, Ntombizodwa; Pityana, Sisa L; Adeosun, S (Elsevier, 2020-05)

  This preliminary study investigates the fabrication of Al-Co-Cr-Fe-Ni-Cu and Al-Ti-Cr-Fe-Co-Ni High Entropy Alloys with the Laser Deposition Technique. The effect of the laser parameters on the microstructure and hardness ...
• Consolidation mechanism, microstructural evolution and corrosion resistance of Inconel 625 coatings 

  Olakanmi, EO; Malikongwa, K; Nyadongo, ST; Hoosain, Shaik E; Pityana, Sisa L (Taylor and Francis, 2020-07)

  The inter-relationships between geometrical properties, microstructural characteristics and corrosion resistance on one hand and laser-material interaction parameter (a) on the other hand are examined. A laser-material ...
• Characteristic effects of alloying elements on ß solidifying titanium aluminides: A review 

  Raji, Sadiq Abiola; Popoola, API; Pityana, Sisa L; Popoola, OM (Elsevier, 2020-07)

  The high strength-to-weight ratio property of titanium aluminide (TiAl) based intermetallic alloys makes researchers regard this type of material as a potential replacement for the heavier superalloys of nickel. These ...
• Review on direct metal laser deposition manufacturing technology for the Ti-6Al-4V alloy 

  Sibisi, Percival N; Popoola, API; Arthur, Nana KK; Pityana, Sisa L (Springer, 2020-03)

  Direct laser metal deposition (DLMD) is a breaking edge laser-based additive manufacturing (LAM) technique with the possibility of changing the perception of design and manufacturing as a whole. It is well suitable for ...
• Effect of in-situ heat treatment and process parameters on the laser-deposited IN718 microstructure and mechanical properties 

  Masina, Bathusile N; Skhosane, Besabakhe S; Tlotleng, Monnamme (Cambridge University Press, 2020)

  The direct laser-deposited Inconel 718 (IN718) specimens were produced using 1073 nm, high power continuous wave (CW), IPG Ytterbium fibre laser and in-situ heat treatment. The laser power and in-situ heat treatment ...
• Axial fatigue behaviour of additively manufactured tool steels 

  Tshabalala, Lerato C; Sono, Oscar JH; Makoana, Nkutwane W; Masindi, J; Maluleke, O; Johnston, C; Masete, S (Elsevier, 2020-06)

  Tool steels contain high-nickel and low-carbon content, consisting of alloying elements such as Ni, Co, Mo, Ti and Al. These tool steels exhibit excellent mechanical properties combining high strength with good toughness. ...
• Investigation into laser refurbishment and transformation hardening of cast iron forming dies for the automotive industry 

  Theron, Marita; Van Rooyen, Corney; Malabi, Khorommbi P (American Institute of Physics, 2020-05)

  Forming dies used in the automotive industry are shaped as such that they impart a predetermined contour or a profile to the workpiece. Due to subsequent assembly requirements of sheet-formed body structure components, the ...
• LENS manufactured -TNB turbine blade using Laser “in situ” alloying approach 

  Tlotleng, Monnamme; Pityana, Sisa L (Cambridge University Press, 2020-01)

  A hollow γ-TNB turbine blade was 3D printed in this studying using the –R Optomec LENS machine from the elemental powders of aluminium, niobium and titanium making use of the laser “in situ” alloying approaching. The printed ...
• Local heat treatment of a laser build-up 

  Theron, Maritha; Van Rooyen, Corney; Malabi, Khorommbi P; Hoosain, Shaik E (Elsevier, 2019)

  Laser cladding or laser metal deposition involves the deposition of any weldable material onto the surface of a metal substrate by means of a laser beam. Although clad deposits are fully fusion-joined to the substrate ...
• Experimental investigation on the influence of laser power and scan speed on track geometry in direct laser cladding of al – carbides powder composites on steel substrate 

  Elkoussy, A; Youssef, AF; Pityana, Sisa L; Taha, MA (HBRP, 2019)

  Coating steel surfaces with hard ceramic particles in Aluminum has a great influence to improve mechanical properties and wear resistance. This research investigated direct laser deposition, where no binder is used, of ...
• Development of an integrated design methodology model for quality and throughput of Additive Manufacturing processes 

  Oyesola, MO; Mpofu, K; Mathe, Ntombizodwa R; Danisyam, I (Elsevier, 2019-05)

  Additive manufacturing (AM) has risen to be a substantial part of modern manufacturing due to its unique capabilities and has already been fondly adopted in various fields especially in the aerospace. In order to fully ...
• Biobased biodegradable polymers for ecological applications: A move towards manufacturing sustainable biodegradable plastic products 

  Muniyasamy, Sudhakar; Mohanrasu, K; Gada, Abongile; Mokhena, Teboho C; Mtibe, A; Boobalan, T; Paul, V; Arun, A (Wiley, 2019-03)

  In recent years, the emerging environmental concern for traditional plastic materials has posed a challenge to academia and industries to come up with an alternative eco-friendly material. This is because the post-consumer ...
• High entropy alloys for aerospace applications 

  Dada, M; Popoola, P; Adeosun, S; Mathe, Ntombizodwa R (IntechOpen, 2019-09)

  In the aerospace industry, materials used as modern engine components must be able to withstand extreme operating temperatures, creep, fatigue crack growth and translational movements of parts at high speed. Therefore, the ...
• Effects of A1 and heat treatment on the microstructure and hardness of Ti-A1 synthesized via in situ melting using LENS 

  Tlotleng, Monnamme (MDPI, 2019-05)

  Producing alloys via in-situ laser alloying approach is becoming very easy and a topical issue in the field of laser additive manufacturing. Several studies have emerged, accompanied by a statement by Gasper et al. (2017), ...
• Laser surface deposition of niobium and titanium-niobium on Ti6A14V substrates for biomedical applications 

  Pityana, Sisa L; Baloyi, N; Tlotleng, Monnamme; Popoola, P (Southern African Institute of Mining and Metallurgy, 2019-04)

  The advantages of using Nb and Ti-Nb coatings for improving the hardness and corrosion resistance of Ti6Al4V were investigated. It has been reported that Ti6Al4V used in orthopaedic implants tends to release toxic Al and ...
• Surface morphology characterisation for parts produced by the high speed selective laser melting 

  Shange, Mfanufikile; Yadroitsava, I; Pityana, Sisa L; Yadroitsev, I; Bester, Duwan C (IOP Publishing, 2019-11)

  Additive Manufacturing (AM) systems are unique in terms of fast production and lead time to market. South Africa has built the AM Laser Powder Bed Fusion (LPBF) machine called Aeroswift with the world's largest build volume ...
• Effect of powder bed preheating on distortion and mechanical properties in high speed selective laser melting 

  Motibane, Londiwe P; Tshabalala, Lerato C; Mathe, Ntombizodwa R; Hoosain, Shaik E; Knutsen, RD (IOP Publishing, 2019-10)

  Selective Laser Melting (SLM) is known to cause residual stresses due to the inherent large thermal gradients from high heating and cooling rates during manufacturing. The residual stresses tend to induce distortion, ...
• Influence of stress relieving thermal cycles on AISI10 Mgspecimens produced by selective laser melting 

  Mfusi, Busisiwe J; Mathe, Ntombizodwa R; Popoola, Patricia A; Tshabalala, Lerato C (CoSAami, 2019-10)

  The AlSi10Mg alloy is known for its castability, corrosion resistance, high heat conductivity, low weight and good weldability. The applications of the aluminium alloy components includes heat exchangers that are subjected ...
• Improving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatment 

  Lekoadi, Paul M; Tlotleng, Monnamme; Maledi, N; Masina, Bathusile N (RAPDASA, 2019-11)

  Selective laser melting (SLM) is a powder bed additive manufacturing technique that produces components layerby-layer from computer aided designs as opposed to conventional manufacturing methods. Although this manufacturing ...

View more