1. A thermal processing map of a ZrCuNiAlEr bulk metallic glass in the supercooled liquid region.
- Author
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Li, Chunyan, Yin, Jinfeng, Ding, Juanqiang, Zhu, Fuping, Xu, Fei, Zhao, Yanchun, and Kou, Shengzhong
- Subjects
METALLIC glasses ,EFFECT of temperature on glass ,STRAINS & stresses (Mechanics) ,LIQUID metals ,STRAIN rate ,SUPERCOOLED liquids ,THERMOFORMING - Abstract
Thermal compression tests of (Zr
0.6336 Cu0.1452 Ni0.1012 Al0.12 )97.4 Er2.6 bulk metallic glass (BMG) were performed at temperature of 410, 420, 430 and 440 °C and strain rates of 5 × 10−4 , 10−3 , 5 × 10−3 and 10−2 s−1 , and a thermal processing map was constructed in the supercooled liquid region. The results indicate that in low strain rate regions (5 × 10−4 -10−3 s−1 ), the processing efficiency range is 70-85% and stress range is 70-120 MPa with temperatures of 410 and 420 °C, and the samples can be thermally processed under relatively small stress and show better fluidity, so temperatures of 410 and 420 °C and the strain rate range of 5 × 10−4 -10−3 s−1 are optional thermal processing parameters. When the temperature is 430 °C and the strain rate range is 5 × 10−4 -10−2 s−1 , the processing efficiency range is 75-85%, and the stress range is 16-106 MPa. The (Zr0.6336 Cu0.1452 Ni0.1012 Al0.12 )97.4 Er2.6 BMG can be thermoformed under smaller flow stress and shows excellent fluidity; therefore, 430 °C and 5 × 10−4 -10−2 s−1 also are optional thermal processing parameters. [ABSTRACT FROM AUTHOR]- Published
- 2019
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