Author:Tlotleng, Monnamme; Masina, Bathusile N; Pityana, Sisa LDate:Jan 2017The use of titanium aluminides as high temperature materials in the aerospace and automobile industries is becoming a reality since their early research and development in 1955. Their mechanical properties at elevated temperatures make them ...Read more
Author:Masikane, M; Chikwanda, HK; Sigalas, IDate:Jul 2015Over the past years, the blended elemental powder metallurgy (PM) approach has been identified as one of the most promising strategies to reduce the cost of titanium-based components. However, oxygen pick-up, inhomogeneity of the microstructure ...Read more
Author:Tlotleng, Monnamme; Lengopeng, Thabo; Seerane, Mandy N; Pityana, Sisa LDate:Oct 2017Ti and its intermetallic alloys are light-weight and have good creep properties. Materials of this nature are desired for the manufacturing of parts for the aerospace, automotive and power plants. Titanium aluminides, in particular, are ...Read more
Author:Tlotleng, Monnamme; Lengopeng, T; Pityana, Sisa LDate:Oct 2016Titanium aluminide intermetallics are very brittle at room temperature, hence they are challenging to fabricate even by conventional manufacturing techniques such as casting and forging. The production of TiAl from elemental powders using ...Read more
Author:Popoola, API; Fatoba, OS; Popoola, M; Pityana, Sisa LDate:Oct 2016Martensitic stainless steels are used in the production of steam turbine blades but their application is limited due to low hardness and poor corrosion resistance. Laser surface alloying and heat treatment of X12CrNiMo Martensitic stainless ...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:Theron, Maritha; Van Rooyen, Corney; Malabi, Khorommbi P; Hoosain, Shaik EDate:2019Laser 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 material, the very low ...Read more
Author:Tlotleng, MonnammeDate:Feb 2019This 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
Author:Tlotleng, Monnamme; Makoana, Nkutwane W; Pityana, Sisa L; Masina, Bathusile NDate:Nov 2016It 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
Author:O'Quigley, DGF; Luyckx, S; James, MNDate:May 1996Two sets of WC-Co grades were produced, with cobalt content ranging from 3 to 50 wt.%. The mean grain size of the two sets was 2.2 and 6 mu m respectively. The two sets of grades were used to investigate the relationship between hardness and ...Read more
Author:Gxowa, Z; Camagu, ST; Govender, S; Pereira, MFDate:Jul 2015A powder metallurgical process was used to fabricate Metal Matrix Composites (MMCs). A 2124 aluminium alloy was reinforced with 5 and 10 vol. % of Al2O3 (40-70nm) to form Metal Matrix Nano Composites (MMNCs) as well as 10 and 15 vol. % of SiC ...Read more
Author:Adesina, OS; Popoola, API; Pityana, Sisa L; Oloruntoba, DTDate:Dec 2017Titanium alloys have been used for variety of engineering applications but their relatively low hardness and low thermal conductivity are shortcomings that have reduced their potential use. In this work, attempts have been made to study the ...Read more