Deformation crossover in nanocrystalline Zr micropillars: The strongest external size

被引：21

作者：

Zhang, J. Y. ^{[1
]}

Cui, J. C. ^{[1
]}

Liu, G. ^{[1
]}

Sun, J. ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

SCRIPTA MATERIALIA | 2013年 / 68卷 / 08期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Nanocrystalline Zr micropillar; Plastic deformation; Strength; Size effect; MECHANICAL-BEHAVIOR; PLASTICITY;

D O I：

10.1016/j.scriptamat.2012.12.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

For small-scale metallic single crystals, systematic studies have established that external sample size (phi) has an obvious influence on the apparent strength, following a "smaller is stronger" fashion. In the present nanocrystalline (NC) Zr micropillars, deformation crossover leads to the strongest external size emerging at a critical phi approximate to 400 nm, similar to that of bulk-scaled NC metals. Above the critical external size the NC Zr pillars failed via highly inhomogeneous single-shear offset, below which they deformed via relative homogeneous shear. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：639 / 642

页数：4

共 30 条

[1] Manifestation of external size reduction effects on the yield point of nanocrystalline rhodium using nanopillars approach [J].