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Serious reheat cracking susceptibility was found in Ti 2 AlNb alloy resistance spot weldments and the cracking mechanism was investigated in this work by means of hot ductility test and microstructure analysis. The results indicated that the precipitation of hardening phase (O phase) together with the residual stress have led to cracking during post-weld heat treatment in Ti 2 AlNb...
Microstructure, phase composition, and properties of the titanium aluminide diffusion layers produced on Ti6Al4V by Chemical Vapour Deposition (CVD) at various process parameters were investigated. It was found that the layers produced by CVD contain a mixture of the Ti 2 AlN + TiAl 2 +Ti 3 Al phases, while the additional heat treatment step after CVD changes the composition...
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