Effect of cold rolling on compressive and tensile mechanical properties of Zr52.5Ti5Cu18Ni14.5Al10 bulk metallic glass |
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| Authors: | S. Scudino B. Jerliu K.B. Surreddi U. Kühn J. Eckert |
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| Affiliation: | 1. IFW Dresden, Institut für Komplexe Materialien, Postfach 27 01 16, D-01171 Dresden, Germany;2. TU Dresden, Institut für Werkstoffwissenschaft, D-01062 Dresden, Germany;1. IFW Dresden, Institute for Complex Materials, Helmholtzstraße 20, D-01069 Dresden, Germany;2. TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany;3. School of Materials Science and Engineering, Hunan University, Changsha 410082, PR China;1. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China;1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China;2. WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;1. IFW Dresden, Institute for Complex Materials, P.O. Box 27 01 16, D-01171 Dresden, Germany;2. TU Dresden, Institut für Werkstoffwissenschaft, D-01062 Dresden, Germany;3. Politehnica University Timisoara, P-ta Victoriei 2, RO-300006 Timisoara, Romania;4. European Synchrotron Radiation Facilities ESRF, BP 220, 38043 Grenoble, France;5. Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria;6. Department Materials Physics, Montanuniversität Leoben, Jahnstraße 12, A-8700 Leoben, Austria;1. International Center for New-Structured Materials (ICNSM), School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, PR China;2. KoreaTech, Korea University of Technology and Education, Chungnam Province, 330-708, Republic of Korea |
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| Abstract: | The effect of cold-rolling on structure, thermal stability, and compressive and tensile mechanical properties of the Zr52.5Ti5Cu18Ni14.5Al10 bulk metallic glass has been investigated. The results reveal that cold-rolling does not influence the thermal stability of the material. However, the small plastic deformation induced by cold-rolling is very effective for improving the room temperature plastic strain of the glass: the compressive plastic strain increases from 1.1% for the as-cast material to 2.6% for the cold-rolled sample and the tensile ductility increases from 0% for the as-cast glass to 0.8% for the cold-rolled sample. Hardness measurements indicate that cold rolling creates a heterogeneous microstructure consisting of hard and soft regions. Most likely, the soft regions are preferred locations for shear band formation and propagation, whereas the hard regions may act as obstacles for shear band propagation, effectively limiting shear bands from propagating catastrophically and, consequently, enhancing the room temperature plastic deformation of the glass. |
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