P Daswa

Bio: P Daswa is an academic researcher from Council for Scientific and Industrial Research. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.

Development of a biocompatible Ti-Nb alloy for orthopaedic applications

Abstract: Authors acknowledge the financial support of the department of Science and Technology (DST) South Africa. The technical support of the Council of Scientific and Industrial Research (CSIR) and the contribution of the University of Pretoria is acknowledged as well.

Plasma Spheroidisation of Irregular Ti6Al4V Powder for Powder Bed Fusion

Abstract: Metal powders suitable for use in powder bed additive manufacturing processes should ideally be spherical, dense, chemically pure and of a specified particle size distribution. Ti6Al4V is commonly used in the aerospace, medical and automotive industries due to its high strength-to-weight ratio and excellent corrosion resistance properties. Interstitial impurities in titanium alloys have an impact upon mechanical properties, particularly oxygen, nitrogen, hydrogen and carbon. The plasma spheroidisation process can be used to spheroidise metal powder consisting of irregularly shaped particles. In this study, the plasma spheroidisation of metal powder was performed on Ti6Al4V powder consisting of irregularly shaped particles. The properties of the powder relevant for powder bed fusion that were determined included the particle size distribution, morphology, particle porosity and chemical composition. Conclusions were drawn regarding the viability of using this process to produce powder suitable for additive manufacturing.

Mechanical and structural behaviour of TiAlV nanocrystalline elaborated by mechanical milling technique

Abstract: The aim of this study is to fabricate the Ti50Al40X10 nanostructured alloy (X: V) from pure titanium, aluminium, and vanadium powders by using a high-energy planetary ball mill with increasing milling time from 10 to 80 h. Morphology, structural, and mechanical properties of this alloy were investigated by a SEM, XRD, and nano-indentation testing. The effect of milling time on structural, morphological, and mechanical properties has been investigated. Microstructural characterisation showed a decrease of average particle size during milling time. Crystallite size decreased from 49 to 6.02 nm and lattice strain increased from 0.15% to about 0.89% during mechanical alloying. In addition, the mechanical properties of Ti50Al40V10 nanostructured materials were strongly depended on the microstructure and crystallite size of new phases that appear during mechanical milling. Microhardness of the Ti50Al40V10 alloy increases with milling time from 261 to 738 Hv. These changes could be attributed to the crystallite size and the strain variations during milling.

Development of pore functionally graded Ti6Al4V scaffolds with biocompatible surface for bone repair

Abstract: Pore functionally graded scaffolds (PFGS) were successfully produced via the powder metallurgical space holder technique as a result of the evaporation of magnesium (Mg) particles. The arra...