The glass forming ability of melt-spun Ti65-xZr xBe18ujNis (x = 0, 5, 10, 15) amorphous alloys have been investigated by differential scanning calorimetry (DSC) and X-ray diffractometry (XRD). With increasing Zr contents, x from 0 to 15, ΔTx (= Tx - Tg), Trg (= Tg/Tl) and γ (= Tx/(Tg + Tl)), where T g = glass transition temperature, Tx = crystallization temperature and Tl = liquidus temperature, gradually increase from 35 to 40 K, from 0.558 to 0.621, and from 0.378 to 0.406, respectively. The Ti65-x-ZrxBe18Cu9Ni8 (x = 10, 15) BMG cylinders with the diameter up to 6 mm are successfully fabricated by the injection casting method, exhibiting high Vickers hardness (681-700) and yield strength (2.0-2.1 GPa). Ti-Zr-Be-Cu-Ni alloys with >50at% Ti content have higher specific strength than any other Ti-based BMGs reported so far.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering