Journal article

Effects of oxidation and boron addition on tensile creep properties of cast Ti-46Al-2V-1Cr based alloys

K Xia, X Wu, J Zhang

INTERMETALLICS | ELSEVIER SCI LTD | Published : 2003

Abstract

Creep behaviours of Ti-46.5Al-2.5V-1Cr (at.%) and Ti-46.2Al-2V-1Cr-0.5B-0.4Ni alloys were investigated at 750 °C under constant stresses of 200 and 120 MPa, respectively, both in air and in vacuum. A well-defined steady state was achieved for Ti-46.5Al-2.5V-1Cr tested in vacuum. However, the specimens tested in air and those of Ti-46.2Al-2V-1Cr-0.5B-0.4Ni generally showed a lack of steady state deformation. Although the secondary creep rates were comparable for Ti-46.5Al-2.5V-1Cr, the total creep life was much shorter for the specimens tested in air compared to those tested in vacuum. For Ti-46.2Al-2V-1Cr-0.5B-0.4Ni, the secondary creep rate was increased and creep life much shortened when t..

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University of Melbourne Researchers