Superplastic deformation of Zr{sub 65}Al{sub 10}Ni{sub 10}Cu{sub 15} metallic glass
- Tohoku Univ., Sendai (Japan). Inst. for Materials Research
- Research Inst. of Electric and Magnetic Materials, Sendai (Japan)
The authors have discussed the plastic deformation behavior of the supercooled liquid in Zr{sub 65}Al{sub 10}Ni{sub 10}Cu{sub 15} glassy alloy with a wide supercooled liquid region. The flow stress increases with increasing strain rate and decreasing temperature. The plot of log {sigma} versus log {dot {var_epsilon}} exhibited a sigmoidal shape. In the amorphous solid below the glass transition temperature, the m values and the elongation to failure were less than 0.3 and 100%, respectively. On the contrary, the supercooled liquid above the glass transition temperature exhibited the m values from 0.3 to 0.8 and the elongation more than 200%, respectively. The large elongation of 340% was achieved at a high strain rate of 5.0 {times} 10{sup {minus}2} s{sup {minus}1} at 673 K. The authors have obtained a large plastic deformation in metallic glass which was similar to a high-strain-rate superplasticity in polycrystalline materials. This seems to promise further development of the glassy alloy with a wide supercooled liquid region as a new material with high strength and good workability.
- Sponsoring Organization:
- Ministry of Education, Science and Culture (Japan)
- OSTI ID:
- 529516
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 4 Vol. 37; ISSN 1359-6462; ISSN SCMAF7
- Country of Publication:
- United States
- Language:
- English
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