首页|The effect of hydrogenation on the fracture of Ti2AlNb-based alloy during ball milling
The effect of hydrogenation on the fracture of Ti2AlNb-based alloy during ball milling
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NSTL
Elsevier
In this work we have studied the effect of phase composition and microstructure of a rapidly solidified Ti2AlNb-based alloy containing hydrogen on deformation of the alloy during ball milling and production of a fine-dispersed powder. Hydrogen is introduced into the alloy up to a concentration of 2.0 wt%. The X-Ray diffraction (XRD) analysis and Scanning Electron Microscopy (SEM) show that the alloy has the following phase compositions depending on hydrogen content: β + O, β/β-hydride, β/β-hydride + intermetallic hydride (Ti2AlNbHx) or a single-phase intermetallic hydride. It is found that in the hydrogenated β + O alloy containing a small amount of hydrogen a strong decrease in ductility occurs, but this does not affect the ball milling and synthesis of the fine-dispersed powder. Efficient milling of the rapidly solidified alloy has been achieved when hydrogen content was 1.2 wt% and exceeding this value when a transformation from the H-saturated solid solution into a hydride phase is observed in the alloy or the formation of a single phase hydride occurs.
NSTL
Elsevier
