Deformation behavior in the isothermal compression of hydrogenated Ti-5.6Al-4.8Sn-2.0Zr-1.0Mo alloy

The isothermal compression of hydrogenated Ti-5.6Al-4.8Sn-2.0Zr-1.0Mo alloy has been carried out. The experimental result shows that the additional hydrogen significantly decreases the flow stress of Ti-5.6Al-4.8Sn-2.0Zr-1.0Mo alloy. The minimum peak stress at deformation temperature of 830-900 °C corresponds to the hydrogen content of 0.4 wt.%, alternatively the appropriate hydrogen content raises the true strain rate up to one order of magnitude in comparison with the received Ti-5.6Al-4.8Sn-2.0Zr-1.0Mo alloy. X-ray diffraction examination shows the appropriate hydrogen content accelerates the b phase transformation so as to improve the workability of this alloy. However, the hydride phase appears when the hydrogen content is about 0.734 wt.%, which increases of the flow stress in comparison to the flow stress of this alloy with hydrogen content of 0.4 wt.%.