RT Journal Article
T1 Mechanical properties and microstructural evolution of vacuum hot-pressed titanium and Ti-6Al-7Nb alloy
A1 Bolzoni, Leandro
A1 Ruiz Navas, Elisa María
A1 Neubauer, E.
A1 Gordo Odériz, Elena
AB Hot-pressing is a powder metallurgy process where loose powder is loaded into a mould, usually of graphite, and sintered by the simultaneous application of high temperature and pressure. In this study elemental titanium and Ti&-6Al&-7Nb alloy powders are hot-pressed under different conditions in order to study the influence of the processing parameters on the microstructure and mechanical properties. The samples are characterised in terms of relative density, microstructure, XRD, percentage of interstitials, three-point bending test and hardness. Relative densities as high as 99% are obtained, the oxygen and carbon content remains almost constant but nitrogen percentage increases. This is due to the interaction with the BN coated mould and leads to the formation of a reacted layer in the surface, composed by different titanium compounds, which greatly affect the mechanical properties. Nevertheless, the removal of this reacted layer leads to an important improvement of the ductility, especially for elemental titanium.
PB Elsevier
SN 1751-6161
YR 2012
FD 2012-05
LK https://hdl.handle.net/10016/17223
UL https://hdl.handle.net/10016/17223
LA eng
NO The authors are grateful for the financial support from the Comunidad de Madrid through the ESTRUMAT (S-2009/MAT–1585) project and from the Spanish Ministry of Education through the R&D Project MAT2009-14448-C02-02.
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RD 31 may. 2024