Journal
INTERMETALLICS
Volume 19, Issue 1, Pages 48-53Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2010.09.005
Keywords
metallic glass; deformation map; mechanical properties at high temperatures; superplastic behavior
Categories
Funding
- National Natural Science Foundation of China [50601011]
- National Basic Research Program of China [2007CB607603]
- National Defense of China [A2720060295]
- China Scholarship Council
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The homogeneous deformation behavior of Ti41 5Cu37 5Ni7 5Zr2 5Hf5Sn5Si1 BMG has been investigated by compression tests The results show that its high-temperature deformation behavior is strongly dependent on strain rate and temperature and there exists a transition from non-Newtonian flow to Newtonian flow with decrease in strain rate which can be explained based on the transition state theory In addition this alloy can reach a large compressive strain than 08 at high strain rate however the much higher flow stress and lower value of S parameter compared with typical BMGs indicates its worse formability in the SLR. A beneficial domain (temperature and strain rate) for optimum hot workability of this alloy has been roughly located by constructing the power dissipation efficiency map where the power dissipation efficiency is larger than 0 8 (C) 2010 Elsevier Ltd All rights reserved
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