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Micropillar compression studies on a bulk metallic glass in different structural states
A. Dubacha, b, R. Raghavanb, c, J.F. Löfflera, J. Michlerb and U. Ramamurtyc
aLaboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, Wolfgang-Pauli-Strasse 10, 8093 Zurich, SwitzerlandbEMPA Materials Science and Technology, Feuerwerkerstrasse 39, 3602 Thun, SwitzerlandcDepartment of Materials Engineering, Indian Institute of Science, Bangalore 560 012, IndiaReceived 10 November 2008; revised 3 December 2008; accepted 4 December 2008. Available online 24 December 2008.
Uniaxial compression experiments on 0.3, 1 and 3 μm diameter micropillars of a Zr-based bulk metallic glass in as-cast, shot-peened and structurally relaxed conditions were conducted. Shear band formation and stable propagation is observed to be the plastic deformation mode in all cases, with no detectable difference in yield strength according to either size or condition. The limitations of uniaxial compression tests in assessing the influence of various material conditions on plasticity, when it is inhomogeneous in nature, are illustrated.Keywords: Compression test; Metallic glasses; Plastic deformation; Shear bands; Free volume -
Density functional theory study on stacking faults and twinning in Ni nanofilms
Pages 124-127
Aditi Datta, U.V. Waghmare and U. Ramamurty -
Density functional theory study on stacking faults and twinning in Ni nanofilms
Aditi Dattaa, U.V. Waghmareb and U. Ramamurtya
aDepartment of Materials Engineering, Indian Institute of Science, Bangalore 560012, India bTheoretical Sciences Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Bangalore 560064, India
Received 12 August 2008; revised 22 September 2008; accepted 23 September 2008. Available online 2 October 2008.
薄膜与小尺度材料及力学性能研究组
Thin films/small-scale materials and mechanical properties group
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