• 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; 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, Ntombi 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, Monname (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 ...
• The validation of the microstructural evolution of selective laser-melted AlSi10Mg on the in-house built machine: Energy density studies 

  Mathe, Ntombizodwa E; Tshabalala, Lerato C (Springer, 2019-12)

  The additive manufacturing of aluminium alloys has become an area of interest for the aerospace industry due to the high strength-to-weight ratios of the produced components. AlSi10Mg has been explored as an alloy of choice ...
• Synthesis of radially aligned nano-rutile modified with Au and Ni for the photodegradation of methyl orange 

  Dziike, F; Franklyn, PJ; Durbach, SH; Maubane, M; Hlekelele, Lerato (Elsevier, 2018-08)

  Radially aligned nano-rutile (RANR) was synthesized using the hydrothermal technique. The RANR structure was formed by the radial aggregation of nanorods with an average width of 9 nm. The radii of RANR ranged between ...
• Microstructural Properties of Heat-Treated LENS In Situ Additively Manufactured Titanium Aluminide 

  Tlotleng, Monnamme (Springer, 2019-02)

  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 ...
• Layer-wise powder deposition defect detection in additive manufacturing 

  Hendriks, Adriaan J; Ramokolo, Lesiba R; Ngobeni, Christopher M; Moroko, Matome C; Naidoo, Darryl (SPIE, 2019-03)

  Additive manufacturing applications, in areas such as aerospace and medicine, are limited due to the lack of process stability and quality management. In particular, geometrical inaccuracies and the presence of mechanical ...
• Amplification of higher-order Poincaré sphere beams 

  Naidoo, Darryl; Sroor, H; Litvin, I; Forbes, A (SPIE, 2019-09)

  The Higher order Poincar´e sphere (HOPS) is generally used to describe scalar and vector orbital angular momentum modes. These modes have found many applications to date; however, they are limited to low power levels. It ...
• Phase effects in tap-hole flow – a computational modelling study 

  Reynolds, QG; Olsen, JE; Erwee, MW; Oxtoby, Oliver F (SAIMM, 2019-06)

  The extraction of molten products and wastes through smelting furnace tap-holes during the tapping process is a complex procedure involving many coupled thermophysical effects. Insight into the fluid flow behaviour in such ...
• A techno-economic analytical approach of laser-based additive manufacturing processes for aerospace applications 

  Oyesola, M; Mpofu, K; Mathe, Ntombizodwa R (Elsevier, 2019-08)

  Additive manufacturing (AM) of laser-based technological solution is developing at an exponential rate and is stepping towards industrialisation. The value and possibilities it brings to modern design and manufacturing ...
• Corroboration of a multi-phase screen model 

  Mabena, Chemist M; Bell, Lebohang T; Roux, FS (SPIE, 2019-02)

  The solution of the infinitesimal propagation equation for atmospheric propagation of single-photon and entangled quantum states, represented in terms of Laguerre-Gauss modes, which is a discrete orbital angular momentum ...
• Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy 

  Mathabathe, Maria N; Govender, Gonasagren; Bolokang, Amogelang S; Mostert, RJ; Siyasiya, CW (Elsevier, 2018-05)

  The -Ti-45Al-2Nb-0.7Cr-0.3Si based intermetallic alloy was developed. Microstructure evolution of the as-cast and heat-treated alloy yielded the spheriodised and Widmanstätten laths. High temperature differential thermal ...

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