Influence of silicon additions on the microstructure and mechanical properties of Cu47Ti34Zr11Ni8 bulk metallic glass forming alloys
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 1350-1354 |
Journal / Publication | Materials Transactions |
Volume | 48 |
Issue number | 6 |
Publication status | Published - Jun 2007 |
Link(s)
Abstract
A group of (Cu47Ti34Zr11Ni 8)100-xSix(x = 0, 1, 2, 3) bulk metallic glass forming alloys with diameter of 3 mm were prepared by water-cooled copper mould cast. Microstructural investigations reveal that with increasing Si content the precipitated phases exhibit quite different morphologies, which varies from earthworm-like phase for alloys with x = 1 to small-sized dendrite phase for alloys with x = 2, and finally to developed dendritic phase for alloys with x = 3. Room temperature compression tests reveal that a transformation from shear fracture to distensile fracture mechanism occurs for the samples with Si content over a critical value. For the alloys with x = 0 and 1, fracture occurs in a shear mode with very high ultimate fracture strength. In contrast, the alloys with x = 2 and 3 seem to fracture by a distensile mode with ultimate fracture strength greatly decreased. The fracture behavior of the as-cast alloys were investigated and discussed. ©2007 The Japan Institute of Metals.
Research Area(s)
- Bulk metallic glass, Mechanical properties, Shear bands, Shear fracture
Citation Format(s)
Influence of silicon additions on the microstructure and mechanical properties of Cu47Ti34Zr11Ni8 bulk metallic glass forming alloys. / Sun, Y. F.; Shek, C. H.; Guan, S. K.
In: Materials Transactions, Vol. 48, No. 6, 06.2007, p. 1350-1354.
In: Materials Transactions, Vol. 48, No. 6, 06.2007, p. 1350-1354.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review