Interface-Driven Plasticity in Metal-Ceramic Nanolayered Composites: Direct Validation of Multiscale Deformation Modeling via In Situ Indentation in TEM

被引：18

作者：

Mara, Nathan A. ^{[1
,2
]}

Li, Nan ^{[2
]}

Misra, Amit ^{[3
]}

Wang, Jian ^{[4
,5
]}

机构：

[1] Los Alamos Natl Lab, Inst Mat Sci, Los Alamos, NM 87545 USA

[2] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA

[3] Univ Michigan, Dept Mat Sci, Ann Arbor, MI 48109 USA

[4] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA

[5] Univ Nebraska, Dept Mech & Mat Engn, Lincoln, NE USA

来源：

JOM | 2016年 / 68卷 / 01期

关键词：

MECHANICAL-PROPERTIES; NANOINDENTATION; BEHAVIOR; MULTILAYERS; STRENGTH;

D O I：

10.1007/s11837-015-1542-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present in situ indentation in a transmission electron microscope on Al-TiN multilayers with individual layer thicknesses of 50 nm and 2.7 nm to explore the effect of length scales on the plastic co-deformability of a metal and a ceramic. At 50 nm, plasticity was confined to the Al layers with brittle fracture in the TiN layers. At 5 nm and below, cracking in TiN was suppressed with co-deformation evident in both layers. The in situ transmission electron microscopy (TEM) straining results demonstrate a profound size effect in enhancing plastic co-deformability in nanoscale metal-ceramic multilayers, as well as direct validation of ex situ and 3-D elastic-plastic deformation models.

引用

页码：143 / 150

页数：8