Electron metallography of ordering reactions in titanium aluminium alloys
The titanium-aluminium phase diagram has been studied using electron and light metallography between 22 and 50 atomic per cent aluminium, and 1000°C to 1250°C. Observations have been made on the β->α martensitic transformation, the ordering of the phase Ti₃A1 and its relationship to the disordere...
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| Format | Dissertation |
| Language | English |
| Published |
University of London
1973
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| Online Access | Get full text |
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| Summary: | The titanium-aluminium phase diagram has been studied using electron and light metallography between 22 and 50 atomic per cent aluminium, and 1000°C to 1250°C. Observations have been made on the β->α martensitic transformation, the ordering of the phase Ti₃A1 and its relationship to the disordered hcp phase α and the high temperature phase β and the precipitation of the γ phase (TiA1). This latter reaction has similarities to the fcc hcp transformation in elemental cobalt, but in this case both product and parent phase are ordered. Further, some complex networks of dislocations obtained by reverting the γ phase have been studied and analysed, this being the first time such networks have observed in a DO₁₉ lattice. |
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