Author/Authors :
Okulov، نويسنده , , I.V. and Kühn، نويسنده , , U. and Marr، نويسنده , , T. and Freudenberger، نويسنده , , J. and Soldatov، نويسنده , , I.V. and Schultz، نويسنده , , L. C. Oertel، نويسنده , , C.-G. and Skrotzki، نويسنده , , W. and Eckert، نويسنده , , J.، نويسنده ,
Abstract :
New as-cast Ti–V–Cu–Ni–Al alloys with advantageous modulus of resilience and bioperformance were developed. Their microstructure is composed of a dendritic β-Ti phase and in-situ precipitated interdendritic compounds. The tough and ductile β-Ti phase exhibits a relatively low Young׳s modulus. Ultrafine intermetallics effectively strengthen the alloys. The effect of microstructure on tensile plasticity was studied on strained (in-situ) and fractured (ex-situ) samples in the scanning electron microscope. It was found that the ductility depends on the volume fraction/distribution of the intermetallic phases as well as local segregation. Already in the as-cast state Ti68.8V13.6Cu6Ni5.1Al6.5 exhibits a tensile strength of about 1250 MPa and a ductility of about 4.5%.
Keywords :
Titanium alloys , Tensile ductility , Electron microscopy , fracture , mechanical characterization
