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Title: An overview of interface-dominated deformation mechanisms in metallic nanocomposites elucidated using in situ straining in a TEM

Abstract

Nanostructured multiphase metallic materials present extraordinary properties, such as high strength, enhanced fatigue and radiation resistance, and thermal stability, compared to conventional bulk metallic materials. Previous research studies have shown that their deformation and fracture behavior are dominated by defect interactions at internal interfaces. In situ straining, including nanoindentation, compression, and tension, in a transmission electron microscope (TEM) has emerged as a powerful tool to investigate the physics of defect–interface interactions at the nano-scale and even atomic scale. Here, the mechanistic insights gained from these experiments coupled with dislocation theory and atomistic modeling has helped develop a fundamental understanding of the mechanical properties. In this article, through some recent investigations on observing dislocation and interface activities, crack propagation, and nanopillar compression, we present current progress in utilizing in situ TEM straining to examine interface-dominated deformation mechanisms.

Authors:
 [1]; ORCiD logo [2];  [1]
  1. Univ. of Michigan, Ann Arbor, MI (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1558983
Report Number(s):
LA-UR-19-27369
Journal ID: ISSN 0884-2914
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Research
Additional Journal Information:
Journal Volume: 34; Journal Issue: 9; Journal ID: ISSN 0884-2914
Publisher:
Materials Research Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; nanostructure; strength; transmission electron microscopy (TEM)

Citation Formats

Cui, Yuchi, Li, Nan, and Misra, Amit. An overview of interface-dominated deformation mechanisms in metallic nanocomposites elucidated using in situ straining in a TEM. United States: N. p., 2019. Web. doi:10.1557/jmr.2019.66.
Cui, Yuchi, Li, Nan, & Misra, Amit. An overview of interface-dominated deformation mechanisms in metallic nanocomposites elucidated using in situ straining in a TEM. United States. doi:10.1557/jmr.2019.66.
Cui, Yuchi, Li, Nan, and Misra, Amit. Thu . "An overview of interface-dominated deformation mechanisms in metallic nanocomposites elucidated using in situ straining in a TEM". United States. doi:10.1557/jmr.2019.66.
@article{osti_1558983,
title = {An overview of interface-dominated deformation mechanisms in metallic nanocomposites elucidated using in situ straining in a TEM},
author = {Cui, Yuchi and Li, Nan and Misra, Amit},
abstractNote = {Nanostructured multiphase metallic materials present extraordinary properties, such as high strength, enhanced fatigue and radiation resistance, and thermal stability, compared to conventional bulk metallic materials. Previous research studies have shown that their deformation and fracture behavior are dominated by defect interactions at internal interfaces. In situ straining, including nanoindentation, compression, and tension, in a transmission electron microscope (TEM) has emerged as a powerful tool to investigate the physics of defect–interface interactions at the nano-scale and even atomic scale. Here, the mechanistic insights gained from these experiments coupled with dislocation theory and atomistic modeling has helped develop a fundamental understanding of the mechanical properties. In this article, through some recent investigations on observing dislocation and interface activities, crack propagation, and nanopillar compression, we present current progress in utilizing in situ TEM straining to examine interface-dominated deformation mechanisms.},
doi = {10.1557/jmr.2019.66},
journal = {Journal of Materials Research},
number = 9,
volume = 34,
place = {United States},
year = {2019},
month = {3}
}

Journal Article:
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