Creep of nanocrystalline Cu, Pd, and Al-Zr

被引：90

作者：

Sanders, PG ^{[1
]}

Rittner, M ^{[1
]}

Kiedaisch, E ^{[1
]}

Weertman, JR ^{[1
]}

Kung, H ^{[1
]}

Lu, YC ^{[1
]}

机构：

[1] LOS ALAMOS NATL LAB,LOS ALAMOS,NM

来源：

NANOSTRUCTURED MATERIALS | 1997年 / 9卷 / 1-8期

关键词：

D O I：

10.1016/S0965-9773(97)00096-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Creep tests were carried out over a range of temperatures (0.24 - 0.64 T-m) and stresses on samples of nanocrystalline Cu, Pd, and Al-Zr made by inert gas condensation and compaction. The measured creep rates are two to four orders of magnitude smaller than the values predicted by the equation for Coble creep. At moderate temperatures, the creep rates are comparable or lower than the corresponding coarse-grain rates. Except for the tests performed at the highest homologous temperatures, all creep curves can be fit by the equation for logarithmic creep. The samples in the as-prepared state are highly twinned, and it is believed that the prevalence of low-energy grain boundaries together with inhibition of dislocation activity caused by the small grain sizes are responsible for the low strain rates. (C) 1997 Acta Metallurgica Inc.

引用

页码：433 / 440

页数：8

共 15 条

[1] An analysis of creep deformation in nanocrystalline materials [J].