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Abstract
The ZrCu-B2 phase can effectively increase the plasticity for some specified Zr based metallic glasses composite (BMGC) by transformation induced plasticity (TRIP) mechanism. However, large and non-uniformly distributed ZrCu-B2 phases usually precipitate in the Zr-based BMGC samples by conventional copper mold casting. Therefore, the concept of inoculation in conventional solidification process was applied to modify the size and distribution of ZrCu-B2 phase in this study. Ta particles (size of 5–30 μm) with 0–4.0 vol% were added into the Zr48Cu47·5Al4Co0.5 BMG matrix as the inoculant. Ta particles can act as nucleation seeds for precipitating a homogeneously distributed ZrCu-B2 phase in the matrix. Moreover, the ZrCu-B2 precipitate size can be further controlled by different solidification cooling rates. It is clearly to see that the ZrCu-B2 phase embedded in the amorphous matrix for the Zr48Cu47·5Al4Co0.5 cast rods added with 0–0.75 vol% Ta particle cast by a copper mold at −30 °C (243 K, or a cooling rate of 650 K/s). In addition, the ZrCu-B2 phase exhibits a round shape and relatively homogeneous distribution. The optimum processes BMGC can exhibit significantly improved mechanical properties (1890 MPa fracture stress and 14% plastic strain) in comparison with the base BMGC (1560 MPa fracture strength and 7.5% plastic strain).
Original language | English |
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Pages (from-to) | 547-555 |
Number of pages | 9 |
Journal | Journal of Alloys and Compounds |
Volume | 774 |
DOIs | |
State | Published - 5 Feb 2019 |
Keywords
- Composite
- Mechanical properties
- Solidification
- Zr-based amorphous alloy
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Dive into the research topics of 'Significant TRIP-effect improvement by manipulating ZrCu-B2 distribution in ZrCuAlCo-based bulk metallic glass composites via inoculating Ta particles'. Together they form a unique fingerprint.Projects
- 2 Finished
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Development of the Open-Cell Toxic-Element-Free Ti-Based Bulk Metallic Glass Foams(3/3)
Jang, S.-C. (PI)
1/08/18 → 31/07/19
Project: Research
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