Enhancement of room-temperature plasticity in a bulk metallic glass by finely dispersed porosity

被引：137

作者：

Wada, T

Inoue, A

Greer, AL

机构：

[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 25期

基金：

日本学术振兴会;

关键词：

D O I：

10.1063/1.1953884

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Melts of Pd42.5Cu30Ni7.5P20 (at. % ) held under pressurized hydrogen are cast into bulk metallic glass (BMG) rods with fine (20-30 mu m diameter) pores uniformly dispersed. The low overall porosities (< 4%) lead to only small reductions in Young modulus and yield strength, but to dramatically enhanced plasticity in compression: Rupture energy as high as 295 MJ m(-3), compared to 16 MJ m(-3) for the pore-free BMG. The pores force the proliferation of shear bands below the overall failure stress, a process of interest for toughening BMGs, materials for which shear localization in deformation restricts structural applications. (c) 2005 American Institute of Physics.

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页码：1 / 3

页数：3

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