Insight into the deformation behavior of niobium single crystals under uniaxial compression and tension at the nanoscale

被引：114

作者：

Kim, Ju-Young ^{[1
]}

Jang, Dongchan ^{[1
]}

Greer, Julia R. ^{[1
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

来源：

SCRIPTA MATERIALIA | 2009年 / 61卷 / 03期

基金：

美国国家科学基金会;

关键词：

Tension test; Compression test; Plastic deformation; Nanoscale; TEM; FLOW-STRESS; SIZE; GOLD;

D O I：

10.1016/j.scriptamat.2009.04.012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Size-dependent deformation behavior of niobium single-crystalline samples 200-900 nm in diameter is investigated by in situ compression and tension testing. Stress-strain curves in compression show discrete plastic flow associated with dislocation escapes at the surface. In tension, plastic flow is more continuous with pronounced strain hardening, and fracture occurs at the low true strain of similar to 3%. Transmission electron microscopy analysis of the same 100 nm nanopillar before and after deformation provides insights into dislocation activity during compression deformation. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：300 / 303

页数：4

共 20 条

[1] Effects of pre-strain on the compressive stress-strain response of Mo-alloy single-crystal micropillars [J].