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Browsing Research and Innovation Unit by Author "du Preez, W.B."

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CHARACTERISATION AND MONITORING OF TI6AL4V (ELI) POWDER USED IN DIFFERENT SELECTIVE LASER MELTING SYSTEMS

Thejane, K.; Chikosha, S.; du Preez, W.B. (South African Journal of Industrial Engineering, 2017)

The characterisation and monitoring of Ti6Al4V (ELI) feedstock powder is an essential requirement for the full qualification of medical implants and aerospace components produced in selective laser melting systems. Virgin ...
DYNAMIC BEHAVIOUR OF DIRECT METAL LASER SINTERED TI-6AL-4V (ELI) UNDER HIGH STRAIN RATES IN COMPRESSION LOADING

Muiruri, A.M.; Maringa, M.; du Preez, W.B.; Masu, L.M. (Central University of Technology, Free State and Vaal University of Technology, 2017)

Deformation behaviour under dynamic compression of Ti-6Al-4V (ELI) produced through additive manufacturing in two different forms; as-built (AB) and stress relieved (SR), was investigated. Both AB and SR specimens were ...
EFFECTIVENESS OF PRIMECAST® AND PMMA ADDITIVE MANUFACTURING PROCESSES TO PRODUCE PATTERNS FOR INVESTMENT CASTING

Nkhasi, N.P.; du Preez, W.B.; van der Walt, J.G. (19th Annual International RAPDASA Conference, 2017)

Investment casting produces parts that need little or no secondary machining operations. Wax patterns used for investment casting are typically produced through an injection moulding process with the accompanying tooling. ...
HIGH CYCLE FATIGUE PROPERTIES OF AS-BUILT TI6AL4V (ELI) PRODUCED BY DIRECT METAL LASER SINTERING

Malefane, L.B.; du Preez, W.B.; Maringa, M. (South African Journal of Industrial Engineering, 2017)

The high cycle fatigue (HCF) properties of direct metal laser sintering (DMLS) of Ti6Al4V (ELI) in three mutually orthogonal build directions were investigated by cycling specimens under load control, in a tension-tension ...
IMPLEMENTING THE SOUTH AFRICAN ADDITIVE MANUFACTURING TECHNOLOGY ROADMAP – THE ROLE OF AN ADDITIVE MANUFACTURING CENTRE OF COMPETENCE#

du Preez, W.B.; de Beer, D.J. (South African Journal of Industrial Engineering, 2015)

The Rapid Product Development Association of South Africa (RAPDASA) expressed the need for a national Additive Manufacturing Roadmap. Consequentially, the South African Department of Science and Technology commissioned the ...
METAL ADDITIVE MANUFACTURING OF BLENDED ELEMENTAL Ti-6Al-4V POWDERS

Zenani, A.; du Preez, W.B.; Yadroitsev, I. (2017)

South Africa primarily produces titanium raw material as a TiO2 rich slag of which most is exported, without further value addition to the mineral. Therefore, powder development becomes a significant aspect of research ...
STRESS RELIEVING OF MARAGING STEEL INJECTION MOULD INSERTS BUILT THROUGH ADDITIVE MANUFACTURING

Adam, I.; du Preez, W.B.; Combrinck, J. (Central University of Technology, Bloemfontein, 2016)

Additive Manufacturing (AM) has been identified as one of the key technologies in Industry 4.0 and has become quite appealing in the Injection Moulding (IM) industry. The development of metal powders for selective laser ...

Browsing Research and Innovation Unit by Author "du Preez, W.B."

Browsing Research and Innovation Unit by Author "du Preez, W.B."

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