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

被引：29

作者：

Song, S. X. ^{[1
]}

Jang, J. S. C. ^{[2
]}

Huang, J. C. ^{[3
]}

Nieh, T. G. ^{[1
]}

机构：

[1] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[2] Natl Cent Univ, Dept Mech Engn, Chungli 32054, Taiwan

[3] Natl Sun Yat Sen Univ, Ctr Nanosci & Nanotechnol, Dept Mat & Optoelect Sci, Kaohsiung 80424, Taiwan

来源：

INTERMETALLICS | 2010年 / 18卷 / 04期

关键词：

Glasses; Metallic; Mechanical properties at high temperatures; Plastic deformation mechanisms; Mechanical testing; Deformation map; HIGH-TEMPERATURE DEFORMATION; AMORPHOUS-ALLOYS; PLASTIC-FLOW; STRAIN-RATES; BULK; COMPRESSION; BEHAVIOR; NANOINDENTATION; STRENGTH; SIZE;

D O I：

10.1016/j.intermet.2009.11.009

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：702 / 709

页数：8

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