Author:Louw, Daniel F; Pistorius, PGHDate:Apr 2019Ti-6Al-(sub4)V produced by laser powder bed fusion can achieve mechanical properties similar to its wrought counterpart if an appropriate post-process heat treatment is applied. The response of the material to post-process heat treatment ...Read more
Author:Erinosho, MF; Akinlabi, ET; Pityana, Sisa LDate:2016In laser metal deposition (LMD), good bonding between two similar or dissimilar materials can be achieved if the interrelationships between the processing parameters are well understood. LMD was conducted by varying the scanning speed and ...Read more
Author:Bayode, A; Akinlabi, ET; Pityana, Sisa L; Shongwe, MBDate:Feb 2017Laser metal deposition (LMD) is one of the additive manufacturing technologies that is used in the production of fully dense parts layer by layer. This innovative manufacturing process has the potential to reduce the weight, time and cost of ...Read more
Author:Mfusi, BJ; Tshabalala, Lerato C; Popoola, API; Mathe, Ntombizodwa RDate:Oct 2018Additive manufacturing is currently applied across a broad material selection and it is growing in production volume and economic impact. Aluminium is one of the materials that play a significant role in the aerospace industry because of its ...Read more
Author:Pretorius, CJDate:Jul 2011The study evaluated five size-selective samplers used in the South African mining industry to determine how their performance affects the X-ray powder diffraction (XRD) response when respirable dust samples are analysed for quartz using ...Read more
Author:Karsten, AE; Singh, ADate:Jun 2009Computer modeling can be a valuable tool to determine the absorption of laser light in different skin layers. For this study, the optical properties of three different skin tumors were used in the model to evaluate the effect on penetration ...Read more
Author:Mienie, S; Basappa Ayanna, Manjunath; Pratt, Lawrence E; Roro, Kittessa T; Diale, MDate:Jun 2018Soiling is an important and unpredictable factor that affects PV plant performance. Soiling is dependent on so many factors making it hard to quantify and accurately incorporate in PV prediction models and levelized cost of electricity (LCOE). ...Read more
Author:Ssemakalu, CC; Ubomba-Jaswa, Eunice; Motaung, KS; Pillay, MDate:Jun 2015The use of solar irradiation to sterilize water prior to its consumption has resulted in the reduction of water related illnesses in waterborne disease endemic communities worldwide. Currently, research on solar water disinfection (SODIS) has ...Read more
Author:Mazibuko, NE; Curle, UADate:Jun 2011During rheo-high pressure die casting (R-HPDC) of Al-Zn-Mg-Cu alloys a coarse eutectic phase is formed. This eutectic phase is difficult to take into solution because of its size and it would require longer solution heat treatment times. The ...Read more
Author:Moshokoa, Nthabiseng; Raganya, Mampai L; Obadele, BA; Olubambi, PA; Machaka, RonaldDate:2020The present study investigates the effect of solution treatment on the microstructure and mechanical properties of as-cast Ti-Mo alloys. The two alloys (Ti-8Mo and Ti-9Mo) were fabricated using a commercially available Arc re-melting furnace. ...Read more
Author:Spangenberg, D-M; Dudley, Angela L; Neethling, P; Forbes, A; Rohwer, EDate:Aug 2013SLMs used for spatial modulation of lasers are often used in conjunction with very narrow bandwidth laser light where diffractive dispersion could be approximated as a constant. It is known that diffractive dispersion is inversely proportional ...Read more
Author:Masete, Mosimanegape S; Muchavi, Noluntu S; Chikosha, SilethelweDate:Dec 2018Determination of tensile properties of materials is required to reliably predict performance of engineering materials in service and for design purposes. Tensile properties are also used as a measure of product quality. Various testing standards ...Read more
Author:Badenhorst, JAC; Davel, MHDate:Nov 2007The authors analyse the effect of speech rate variation on Afrikaans phone stability from an acoustic perspective. Specifically they introduce two techniques for the acoustic analysis of speech rate variation, apply these techniques to an ...Read more
Author:Maubane, Lesego T; Ray, Suprakas S; Jalama, KDate:Jan 2017In this study, butyl-etherified waxy and high amylose starches were melt-processed with biodegradable poly[(butylene succinate)-co-adipate] (PBSA) to improve the long-term stability of the starch-based materials. Butyl-etherification was ...Read more
Author:Esterhuizen, GSDate:Dec 1998The stability of underground coal mines depends on the integrity of the pillars which are required to support the overlying strata. Should the pillars collapse, the safety of the persons in the workings will be threatened. The strength of a ...Read more
Author:Stark, T; Chakauya, E; Kabamba, A; Morris, L; Rybicki, E; Chikwamba, Rachel KDate:01 Sep 2010Due to the increasing demand for pharmaceuticals and the high cost of production in traditional fermentor systems, plants are being considered as alternative production platforms for therapeutic molecules. One of the considerations for ...Read more
Author:Van der Westhuyzen, Christiaan W; Rousseau, AL; Parkinson, CJDate:2007In an investigation into the electrophilic nitrosation reactions of a series of 4,6-disubstituted pyrimidine derivatives, a subtle interplay between the electronic nature of the C-4 and C-6 substituents and reactivity was found where these ...Read more
Author:Mupambi, G; Schmeisser, M; Lötze, E; Malan, C; Dzikiti, Sebinasi; Steyn, WJDate:Jan 2017Pulsing irrigation is a supplementary irrigation strategy whereby South African apple growers aim to reduce tree stress during a heat wave by applying additional water to the orchard floor using microsprinklers. The aim of this research was ...Read more
Author:Mathieu, Renaud; Main, Russell S; Roy, DP; Naidoo, Laven; Yang, HDate:Jun 2019Savannahs are mixed woody-grass communities where low-intensity surface fires are common, affecting mostly the grass layer and rarely damaging trees. We investigated the effect of surface fires in a savannah system in the Kruger National Park, ...Read more
Author:Ramontja, J; Ray, SS; Kesavan Pillai, Sreejarani; Luyt, ASDate:Jan 2011This paper discusses various properties of Poly(lactide) upon nanocomposite formation with functionalized multiwalled carbon nanotubes (f-MWCNTs). The composite was prepared through melt extrusion technique. Functionalization of carbon nanotubes ...Read more