• Microstructure and mechanical properties of selective laser melted Ti-3Al-8V-6Cr-4Zr-4Mo compared to Ti-6Al-4V 

  Madikizela, C.; Cornish, Lesley A.; Chown, Lesley H.; Moller, Heinrich (Elsevier, 2019-02)

  Beta Ti-alloys are known for their high fracture toughness and ductility, and are used in applications where these properties are needed, such as the aerospace and biomedical industries. The selective laser melting of the ...
• Evaluation of ilmenite as dense medium for dry coal fluidized bed beneficiation 

  Kalenda, T.N.; North, B.; Naude, Natasia (Taylor and Francis, 2019)

  Please read abstract in the article.
• Comparison of testing of susceptibility to solidification cracking of ferritic stainless steels using two methods 

  Konadu, D.S.; Pistorius, P.G.H. (Pieter) (Springer, 2020-04)

  The susceptibility to solidification cracking of unstabilized and stabilized ferritic stainless steels was investigated using self-restrained Houldcroft and Modified Varestraint-Transvarestraint (MVT) tests. Nine steel ...
• The effect of ternary alloying with vanadium on Ti-Pt shape memory alloys 

  Daswa, P.; Chikosha, S.; Mahlatjii, M.L.; Siyasiya, Charles Witness (IOP Publishing, 2019-11-09)

  Ti-Pt alloys have attracted much research due to high transformation temperatures (1050oC) which makes them suitable for high temperature applications in automotive and aerospace industries. The binary alloy exhibits ...
• The impact of forensic laser scanning technology on incident investigations in the mining industry 

  Webber-Youngman, R.C.W.; Grobler, H.; Gazi, T.; Stroh, F.; Van der Vyver, A. (Southern African Institute of Mining and Metallurgy, 2019-10)

  Risk assessments have been conducted in the South African mining industry over the past 20 years, but still we do not always correctly identify the root cause of an incident. An incident investigation is not only about ...
• A 4.0D leadership model postulation for the fourth industrial revolution relating to the South African mining industry 

  Uys, Joe; Webber-Youngman, R.C.W. (Southern African Institute of Mining and Metallurgy, 2019-10)

  The mining industry of the 21st century needs a new kind of leader as certain leadership styles and most leadership models currently employed in the world, and also in South Africa, are not sustainable. This article ...
• EBSD characterisation of the B2 orientation in -TiAl based alloy 

  Mathabathe, Maria Ntsoaki; Bolokang, A.S.; Govender, G.; Siyasiya, Charles Witness; Mostert, R.J. (Roelf) (IOP Publishing, 2019-11-09)

  Electron backscattered diffraction (EBSD) has been conducted to determine the orientation relationship of the remnant B2 phase in an -solidified -Ti-45Al-2Nb-0.3Si (at. %) based intermetallic alloy. The morphology and ...
• Preparation and microstructural characterization of the 60Al- 40V master alloy 

  Mapoli, T.O.; Annan, Kofi Ahomkah; Siyasiya, Charles Witness; Mutombo, Kalenda (IOP Publishing, 2019-11-09)

  The present study focused on preparation and characterization of 60Al-40V master alloy which was produced via aluminothermic process. The study assessed the production in order to provide the optimum Al requirement for ...
• The effect of cast structures on texture and mechanical properties of AISI 433 ferritic stainless steel 

  Maumela, M.; Stumpf, Waldo E.; Siyasiya, Charles Witness (IOP Publishing, 2019-11-09)

  The influence of the individual equiaxed and columnar cast structure on the evolution of texture during thermo-mechanical processes (TMP) was investigated using the electron backscatter diffraction (EBSD) technique. The ...
• Carbide-free bainitic steels for rail wheel applications 

  Kapito, A.; Mostert, R.J. (Roelf); Stumpf, Waldo E.; Siyasiya, Charles Witness (IOP Publishing, 2019-09-09)

  In South Africa, forged wheels for rail cars are imported but cast wheels are manufactured locally, although recent developments indicate that forged wheels will in future be manufactured locally. The forged wheels are ...
• Effect of intercritical annealing of normalised Nb-Ti-V microalloyed plate steel on microstructural evolution 

  Kambilinya, P.I.; Siyasiya, Charles Witness; Banks, K.M. (Kevin); Mostert, R.J. (Roelf) (IOP Publishing, 2019-09-09)

  A homogeneous microstructure is required for consistent mechanical properties in normalised Nb-Ti-V microalloyed plate steels. Frequently, as-hot rolled microalloyed plate steels have a banded microstructure that is ...
• Development of a biocompatible Ti-Nb alloy for orthopaedic applications 

  Fikeni, L.; Annan, Kofi Ahomkah; Seerane, M.; Mutombo, K.; Machaka, R. (IOP Publishing, 2019-11-09)

  Metallic biomedical implants such as titanium-based alloys are very useful for orthopaedic applications due to their excellent properties which responds to changes in temperature and other conditions. However, biological ...
• Development of a mathematical equation describing the strain hardening behaviour of metastable AISI 301 austenitic stainless steel 

  Mukarati, T.W.; Mostert, R.J. (Roelf); Siyasiya, Charles Witness (IOP Publishing, 2019)

  The strain hardening behaviour of AISI 301 metastable austenite steel was analysed by evaluating tensile data against the empirical mathematical equations of Hollomon, Ludwik and Ludwigson. It was found that these equations ...
• The effect of soaking and tempering temperatures on high vanadium alloys for grinding media 

  Mabeba, A.D.; Siyasiya, Charles Witness (IOP Publishing, 2019-11-09)

  Vanadium produces the hardest carbides and can influence wear properties positively. However, due to the minerals’ price fluctuations as a result of the current economic climate, vanadium is currently expensive and ...
• Effect of the quench temperature on the mechanical properties of a medium C Mn high Si steel during Q&P heat treatment process 

  Kurup, Vinod; Siyasiya, Charles Witness; Mostert, R.J. (Roelf) (IOP Publishing, 2019-11-09)

  A steel of composition Fe-0.2C-3Mn-2Si-0.5Al was fully austenized followed by a quench and partitioning heat treatment process (Q&P). The quench temperature was varied, which resulted in different volume fractions of ...
• Modeling of high-temperature flow stress of VN and Nb-Ti microalloyed steels during hot compressive deformation 

  Chalimba, S.A. (Stephen Akonda); Mostert, R.J. (Roelf); Stumpf, Waldo E.; Siyasiya, Charles Witness; Banks, K.M. (Kevin) (Springer, 2020-01)

  A simple mathematical model has been developed which describes the flow curve behavior up to the peak true stress or a true strain of 0.6 in unstable austenite. The hot working behavior was analyzed by compression tests ...
• Copper slag from different dumps in the Atacama Region used in mortars as partial replacement of cement 

  Pavez, Osvaldo; Nazer, Amin; Rivera, Oscar; Salinas, Macarena; Araya, Barbara (Universidade Federal do Rio de Janeiro, 2019)

  The use of copper slag as a partial substitute for cement in mortar preparation was studied. Copper slag samples were collected from three dumps in the Atacama Region (Northern Chile). Mortars of 40x40x160 mm (width, ...
• The role of manganese ore reduction morphology development in setting reduction mechanisms 

  Coetsee, Theresa (Elsevier, 2019-06)

  Please read abstract in the article.
• The effect of scan speed and hatch distance on prior-beta grain size in laser powder bed fused Ti-6Al-4V 

  Louw, D.F.; Pistorius, P.G.H. (Pieter) (Springer, 2019-08)

  Ti-6Al-4V 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 ...
• J-integral evaluation of repaired cracks in AA7075-T6 structures subjected to uniaxial tensile stresses 

  Zouambi, Leila; Khodja, Malika; Oudad, Wahid; Fekirini, Hamida; Moller, Heinrich; Bouiadjra, Belabbes Bachir (Elsevier, 2019-08)

  Bonded repairs using composite patches over metallic structures have been evaluated as a cost effective method to increase the life of damaged structures. The J-integral is a widely applied fracture mechanics parameter ...

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