Centimeter‐Sized Quaternary Ti‐Based Bulk Metallic Glasses with High Ti Content of 50 at%

Abstract

Using copper mold suction casting, high Ti content alloys of Ti50Zr16Be24Ni10, Ti50Zr20Be20Ni10, and Ti55Zr15Be20Ni10 are fabricated in bulk metallic glasses (BMGs) with the critical diameters (Dc) of 10, 6, and 5 mm, respectively. In particular, the Ti50Zr16Be24Ni10 BMG is the first centimeter‐scale high Ti content BMG with Ti concentration as high as 50 at%. In addition, these high Ti content BMGs exhibit high specific strength and apparent plastic strain. Especially, the Ti50Zr16Be24Ni10 BMG exhibits a specific strength of 3.87 × 105 N m kg−1 and a plastic strain of 5.7 ± 0.5%. Our results indicate that a combination of lower Zr and higher Be contents promotes glass formation in the Ti–Zr–Be–Ni alloy system. The developed Ti‐based BMGs with high specific strength provide potentials for engineering applications.