|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||Improving the Glass Formation and Mechanical Behavior of Ni-free TiZr-based Bulk Metallic Glasses by Ga Additions
||Mariana Calin, Supriya Bera, Ramasamy Parthiban, Mihai Stoica, Jürgen Eckert
|On-Site Speaker (Planned)
In the present work the influence of Ga additions on glass forming ability, thermal stability and mechanical behavior of Ti40Zr10Cu36-xPd14Gax (x=2, 4, 8 and 10 at.%) bulk metallic glasses (BMG) was thoroughly studied by a combination of X-ray diffraction, differential scanning calorimetry, mechanical tests and ultrasonic measurements. Ti40Zr10Cu34Pd14Ga2 BMG shows the best combination of mechanical properties, with a plastic strain of about 5 % and maximum compressive strength exceeding 2000 MPa. Comparing the Young’s moduli of Ga-containing Ti-alloys in glassy and crystalline states we found that the glassy state shows significant elastic softening. The Young’s moduli of BMGs at the same compressive strength are about 45% lower than for crystalline counterparts. The unusual combination of low modulus and high strength of these novel Ni-free Ti-based glassy alloys could potentially ameliorate the stress shielding concerns associated with bone fixation devices. Financial support through the EC (FP7 VitriMetTech) is gratefully acknowledged.
||Planned: Supplemental Proceedings volume