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Sandy Mariaye

Titanium and titanium alloys, mostly Ti-6Al-4V (90% titanium -6% aluminium- 4% vanadium) alloys are known for their excellent physical, chemical and mechanical properties. The existing limits of using titanium remain until today the manufacturing and processing costs. In order to counteract such limitations, alternative methods of production methods of titanium alloys have been derived over the past decades. One of the most successful methods is powder metallurgy.

The aim of this research looks at simulating the direct powder rolling process by compaction of titanium or titanium hydride powder with master alloy. The resulting compact is then partially sintered (while achieving good homogenisation) followed by hot rolling (resulting in deformation) and annealing (recrystallization of alloy while preventing grain growth) in order to produce Ti-6Al-4V sheets and plates that have comparable properties when compared to cast Ti-6Al-4V.

The purpose of this study is to assess the use and effects of using titanium hydride (compared to pure titanium powder as well) in the production process of Ti-6Al-4V alloys as a result of any difference in physical and mechanical properties. In conjunction, variable processing parameters will also be introduced in the experimental matrix in order to determine the effects of such variations on the properties of Ti-6Al-4V alloys through the manufacturing and processing stages.