Microalloying effect of Si on mechanical properties of Ti based bulk metallic glass

P. H. Tsai, K. T. Hsu, J. H. Ke, H. C. Lin, J. S.C. Jang, J. C. Huang

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The (Ti40Zr10Cu36Pd14)100-xSix (x = 0, 0·5, 1·0, 1·5) bulk metallic glass (BMG) rods with a diameter of 2-4 mm have been successfully fabricated by suction casting method and characterised. The X-ray diffraction results reveal that these entire (Ti40Zr10Cu36Pd14)100-xSix alloy rods exhibit a typical amorphous diffraction pattern with only a broad maximum at 2θ~40°. The optimum glass forming ability values γ and γm (0·430 and 0·774 respectively) occur at the (Ti40Zr10Cu36Pd14)99·5Si0·5 amorphous alloy. This suggests that the Si element present a positive effect on increasing glass forming ability in the Ti40Zr10Cu36Pd14 alloy system. The hardness of these Ti based BMGs exhibits an increasing trend with Si addition and saturated ~710 HV. In addition, the result of compression test shows that the optimum mechanical property occurs at the (Ti40Zr10Cu36Pd14)99·5Si0·5 amorphous alloy, which presents 2050 MPa fracture strength and 8% failure strain.

Original languageEnglish
Pages (from-to)161-165
Number of pages5
JournalMaterials Technology
Volume30
DOIs
StatePublished - 2015

Keywords

  • Casting
  • Mechanical properties at ambient temperature
  • Metallic glasses
  • Scanning and transmission electron microscopy

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