Creation and annihilation of free volume during homogeneous flow of a metallic glass

被引：174

作者：

Heggen, M

Spaepen, F ^{[1
]}

Feuerbacher, M

机构：

[1] Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA

[2] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2005年 / 97卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.1827344

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bulk samples of Pd41Ni10Cu29P20 glass were tested at constant true stress (20-636 MPa) in compression at 550, 555, and 565 K to study the transition from steady-state creep at low stress to deformation-induced softening at high stress. In the high-stress regime strongly accelerating creep was observed. All deformation was homogeneous. The activation volume was 106 Angstrom(3). The isoconfigurational activation energy was 9.03+/-0.64 eV. The disordering rate is proportional to the applied power density (stressxstrain rate). The disordering process is inefficient in energy and in the production of free volume. (C) 2005 American Institute of Physics.

引用

页数：8

共 32 条

[1]

BLETRY M, IN PRESS MAT SCI E A

[2]

CAHN RW, 1984, S RAP SOL MAT, P241

[3] STRUCTURAL INVESTIGATION OF COLD-ROLLED METALLIC GLASSES USING POSITRON-ANNIHILATION METHODS [J].