Plasticity enhancement of Zr-based bulk metallic glasses by direct current electropulsing

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Title:	Plasticity enhancement of Zr-based bulk metallic glasses by direct current electropulsing
Authors:	鄭憲清;Yiu, P.;Jang, J.S.C.;Chang, S.Y.;Chen, Y.C.;Chu, J.P.;Hsueh, C.H.
Contributors:	工學院材料科學與工程研究所
Keywords:	Amorphous materials;Bonding;Condensed matter: structure, mechanical and thermal properties;Deformation and plasticity (including yield, ductility, and superplasticity);Direct current;Electropulsing;Equations of state, phase equilibria, and phase transitions;Exact sciences and technology;Glass transition;Glass transitions;Mechanical and acoustical properties of condensed matter;Mechanical properties;Mechanical properties of solids;Metallic glasses;Nanoindentation;Physics;Plasticity;Shear band;Slip bands;Specific phase transitions;Tribology and hardness;Zirconium base alloys
Date:	2012-06-05
Issue Date:	2026-04-23 11:41:36 (UTC+8)
Publisher:	Elsevier BV;Kidlington: Elsevier B.V
Abstract:	摘要： ► Direct current electropulsing was used to improve the plasticity of Zr-based BMGs. ► Change in plasticity of BMGs was examined by both Vickers and nano-indentations. ► Nanoindentation revealed plasticity enhancement by serrations and plastic criterion. ► Vickers indention showed plasticity enhancement through shear band morphology. Direct current electropulsing was used to improve the plasticity of (Zr53Cu30Ni9Al8)99.5Si0.5 bulk metallic glasses. After the electropulsing treatment, the specimen showed reductions in both the glass transition and the crystallization temperatures while retaining its amorphous structure, and both Young's modulus and the hardness decreased while the nanoindentation loading curve became more serrated. Using the bond-interface method and Vickers indentation, the treated specimen showed more branching of semi-circular shear bands and less radial shear bands compared to its as-cast counterpart. The possible plasticity enhancement mechanism of the electropulsing treatment was also discussed. 出版者： Kidlington: Elsevier B.V 出版日期： 2012-06-05 出處： Journal of Alloys and Compounds, 2012-06, Vol.525, p.68-72 版權： 2012 Elsevier B.V. 版權： 2015 INIST-CNRS 識別號： ISSN: 0925-8388 識別號： EISSN: 1873-4669 識別號： DOI: 10.1016/j.jallcom.2012.02.074
Appears in Collections:	[Institute of Materials Science and Engineering] journal & Dissertation

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