Effect of hydrogen on processing maps in isothermal compression of Ti–6Al–4V titanium alloy

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 502; no. 1; pp. 32 - 37
• Main Authors: Li, M.Q., Zhang, W.F.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 25.02.2009; Elsevier
• Subjects: Applied sciences; Elasticity. Plasticity; Exact sciences and technology; Hydrogen; Isothermal compression; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Processing map; Titanium alloy; Titanium alloy; Isothermal compression; Processing map; Hydrogen; Grain size; Transition metal alloy; Concentration effect; Compression test; Hydrogenation; Titanium base alloys; Strain rate
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2008.11.031

Isothermal compression of the hydrogenated Ti–6Al–4V titanium alloy was carried out on a Thermecmaster-Z simulator at the deformation temperatures ranging from 760 to 920 °C, strain rate ranging from 0.01 to 10.0 s −1 and a maximum height reduction of 60%. Processing maps in isothermal compression of the Ti–6Al–4V titanium alloy with different hydrogen contents are constructed. Efficiency of power dissipation and unstable regions has been obtained by calculating experimental data and by constructing processing maps of the isothermally compressed Ti–6Al–4V titanium alloy. Unstable regions in processing maps of the Ti–6Al–4V titanium alloy varies with hydrogen content resulting from the effect of hydrogen content on volume fraction and grain size of prior α phase in isothermal compression of the Ti–6Al–4V titanium alloy.