Author:Dada, M; Popoola, P; Mathe, Ntombizodwa R; Pityana, Sisa L; Adeosun, S; Aramide, ODate:Jun 2021Corrosion 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
Author:Machio, Christopher N; Konadu, DS; Potgieter, JH; Potgieter-Vermaak, S; Van der Merwe, JDate:Jan 2013Corrosion is an important surface degradation process in some, if not all, applications of tungsten-carbide-(WC-) cobalt- (Co-) based hardmetals. Applications like tools for machining of metals and for wear resistance in the mining industry ...Read more
Author:Kubjane, SM; Arthur, Nana KK; Masina, Bathusile N; Popoola, API; Pityana, Sisa LDate:Sep 2019Because 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
Author:Malatji, N; Popoola, API; Lengopeng, T; Pityana, Sisa LDate:Oct 2020AlCrFeNiCuNb(subx) high entropy alloys were successfully fabricated using laser metal deposition technique. Laser power of 1600W and scanning speed of 1.2 m/min were used during the processing of the alloys. The microstructural, mechanical ...Read more
Author:Ama, Monday O; Khoele, Khotso; Ray, Suprakas SDate:Nov 2018In avoidance of metal ions into the human bloodstream, Ti6Al7Nb became a subsequent alloy for various implant’s purpose. In this study, different corrosion techniques have been utilized to characterize corrosion behavior of Ti6Al7Nb alloy in ...Read more
Author:Mathoho, I; Akinlabi, ET; Arthur, Nana KK; Tlotleng, MonnammeDate:Aug 2020This 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
Author:Aramide, B; Popoola, P; Sadiku, R; Jamiru, T; Pityana, Sisa LDate:Nov 2021Laser cladding is an additive manufacturing technology utilised in surface strengthening, modification, and repair of components subjected to adverse working conditions, such as tillage tools, which is accomplished by adding functionally ...Read more
Author:Masuku, EP; Moller, H; Curle, UA; Pistorius, PC; Li, WDate:Sep 2010The aim of SSM forming is to obtain a semi-solid structure (which is free of dendrites) with the solid present in a near spherical form. The nature of the SSM slurry (with solid spherical grains suspended in a liquid), makes it susceptible ...Read more
Author:Popoola, API; Pityana, Sisa L; Popoola, OMDate:Oct 2011Poor corrosion performance of aluminium alloys in marine environment has been a subject of intensive research recently. Aluminium substrate was alloyed with a combination of two metallic powders (Cu + Mo) using an Nd: YAG solid state laser. ...Read more
Author:Chakraborty, A; Pityana, Sisa L; Dutta Majumdar, JDate:Jan 2017The present investigation aims at improving the wear resistance of AISI 304 stainless steel by laser surface alloying of AISI 304 stainless steel with WC+Co+NiCr (in the weight ratio of 20:40:40). Laser surface alloying was carried out by ...Read more
Author:Pityana, Sisa L; Baloyi, N; Tlotleng, Monnamme; Popoola, PDate:Apr 2019The 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 V ions into the ...Read more
Author:Majumdar, JD; Kumar, A; Pityana, Sisa L; Manna, IDate:Sep 2018Implants made of AISI 316L stainless steel enjoy promising position because of their higher strength as compared to polymer based materials, and higher toughness as compared to the ceramic based implant. However, AISI 316L based implants often ...Read more
Author:Popoola, PAI; Pityana, Sisa L; Fedotova, T; Popoola, OMDate:Jun 2011As the reports in the literature regarding corrosion performance of Al/TiB2 MMC are rather contradictory, the optimization of laser surface alloying parameters for these composite coatings seems to be necessary. The characterization of the ...Read more
Author:De Beer, FC; Coetzer, M; Fendeis, D; Silva, ADCDate:Oct 2004A few nondestructive examination (NDE) techniques are extensively being used worldwide to investigate aircraft structures for all types of defects. The detection of corrosion and eliminations, which are believed to be the major initiators of ...Read more
Author:Dada, M; Popoola, P; Aramide, O; Mathe, Ntombizodwa R; Pityana, Sisa LDate:Jun 2020Laser Additive Manufacturing was used to fabricate AlTiCrFeCoNi high entropy alloy and the corrosion properties of the alloy were investigated in 3.5 wt% NaCl solution. The tests were conducted via potentiodynamic polarization at room temperature ...Read more
Author:Gayen, TK; Pityana, Sisa L; Akinlabi, E; Majumdar, JDDate:Sep 2023The present study concerns the development of titanium carbide (TiC) dispersed titanium matrix composite by laser surface processing of titanium with titanium and carbon (in the weight ratio of 90:10 and 50:50). Laser surface processing has ...Read more
Author:Creig-Smith, SDate:Apr 2001Underground steel water pipelines that are not suitably coated and lined will corrode after a certain period of time, externally where the steel is in contact with the soil and internally where the steel is in contact with water. Such corrosion ...Read more