Van Zyl, A.; Pretorius, Christiaan C.E.; Mathoho, Vhutshilo M.; Mostert, R.J. (Roelf)(South African Institute of Mining and Metallurgy, 2024-11)
The in-service degradation of the mechanical properties of steel components through the damage
mechanism of high temperature hydrogen attack (HTHA), is a topic of concern in the refining
and green hydrogen industry. This ...
Masete, Mosimanegape S.(University of Pretoria, 2017-02)
The Ti-6Al-4V alloy is used in aerospace parts and its microstructure and properties can be
controlled by solution treatment or solution treatment followed by ageing. However, there are
different views on whether ...
Rivera Li Kao, Oscar; Garbers-Craig, Andrie Mariana(Taylor and Francis, 2025)
This study explored, on a laboratory scale, how matte separates from the gangue in the black top of
a PGM smelter. Two PGM concentrates, one with high sulfide content (17.3 mass%, Platreef concentrate)
and the other with ...
Chauke, Rivoningo E.; Siyasiya, Charles Witness; Nyabadza, Davisn(Springer, 2024-12)
High-speed steel (HSS) provides superior wear resistance and high surface quality of rolled-steel products. In this study, the
influence of niobium addition on the solidification behavior and microstructure of high-speed ...
NbRu has a potential as a high-temperature shape-memory alloy (HTSMA) because it has
a martensitic transformation temperature above 1000 ◦C. However, its shape-memory properties
could be improved for consideration in the ...
Lei, Yicong; Yang, Wen; Siyasiya, Charles Witness; Tang, Zhenghua(MDPI, 2024-02-18)
Nb-Ti high-strength low-alloy pipeline steel was subjected to a six-pass rolling process
followed by the coiling process at different temperatures between 600 and 650 ◦C using the thermomechanical
testing system Gleeble ...
The effect of Ru addition on the martensitic transformation and mechanical properties of
Zr50Pd50 xRux SMAs shape memory alloys has been studied. Strain–temperature experiments,
differential scanning calorimeter, and ...
Erwee, Markus Wouter; Reynolds, Q.G.; Zietsman, Johannes Hendrik(Southern African Institute of Mining and Metallurgy, 2024-03)
Pyrometallurgical furnaces, essential for metal extraction, operate at temperatures exceeding
1600°C and represent complex multiphase systems that challenge direct industrial research.
Multiphysics models play a key role ...
Wildenboer, R.A.; Sandenbergh, Roelf(Southern African Institute of Mining and Metallurgy, 2024-10)
Rare earth elements (REE) are present at concentrations of approximately 0.36 % in phosphogypsum
stacks located in Phalaborwa, South Africa. The REE are present in the phosphogypsum in solid
solution in the gypsum and ...
Coetsee, Theresa; De Bruin, Frederik Johannes(Springer, 2024-11)
An EERZ (effective equilibrium reaction zone) model was applied to the modified SAW (submerged arc welding) process to simulate the SAW process metallurgy in the gas-slag-metal reaction system. The SAW process was modified ...
Coetsee, Theresa; De Bruin, Frederik Johannes(MDPI, 2023-04-05)
Aluminium metal is not typically added to the submerged arc welding (SAW) process
because it is easily oxidised to form unwanted slag in the weld pool. The successful application of
aluminium as a de-oxidiser is illustrated ...
Coetsee, Theresa; De Bruin, Frederik Johannes(MDPI, 2023-07-14)
The scope of this work is to improve the SAW process understanding and present an improved description of the SAW process in terms of gas-slag-metal reactions with alloy powder and Al powder additions. The scope does not ...
Coetsee, Theresa; De Bruin, Frederik Johannes(MDPI, 2023-02)
Unconstrained metal powders of Cu, Cr, Ni and Al were applied to submerged arc welding
(SAW) to clarify the chemical behaviour of copper in this modified SAW process. Aluminium metal
is avoided in SAWbecause it is easily ...
Coetsee, Theresa; De Bruin, Frederik Johannes(MDPI, 2023-03)
This review is focused on the thermochemical behaviour of fluxes in submerged arc welding
(SAW). The English-language literature from the 1970s onwards is reviewed. It was recognised early
on that the thermochemical ...