Inhomogeneous to homogeneous transition in an Au-based metallic glass and its deformation maps

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Title:	Inhomogeneous to homogeneous transition in an Au-based metallic glass and its deformation maps
Authors:	Song,SX;Jang,JSC;Huang,JC;Nieh,TG
Contributors:	機械工程學系
Keywords:	HIGH-TEMPERATURE DEFORMATION;AMORPHOUS-ALLOYS;PLASTIC-FLOW;STRAIN-RATES;BULK;COMPRESSION;BEHAVIOR;NANOINDENTATION;STRENGTH;SIZE
Date:	2010
Issue Date:	2012-03-27 17:03:31 (UTC+8)
Publisher:	國立中央大學
Abstract:	Transition from inhomogeneous to homogeneous deformation was characterized in an Au(49)Ag(5.5)Pd(2.3)-Cu(26.9)Si(16.3) metallic glass by compression of micro-scaled pillar samples and morphological observations of deformed specimens. In compression, the transition was revealed as the absence of flow serration in a stress-strain curve. Morphologically, it corresponds to the disappearance of localized shear band and the sample is uniformly deformed. The transition was found to be both temperature and strain rate dependent, and at a higher strain rate, it occurred at a higher temperature. The homogeneous deformation and, in particular the stress overshoot phenomenon, could be described by a shear transition zone model. Based on the current data, deformation maps were developed for the Au(49)Ag(5.5)Pd(2.3)-Cu(26.9)Si(16.3) metallic glass. Published by Elsevier Ltd.
Relation:	INTERMETALLICS
Appears in Collections:	[Departmant of Mechanical Engineering ] journal & Dissertation

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