The effect of defects on strength of gold microparticles

Tyler J. Flanagan; Oleg Kovalenko; Eugen Rabkin; Seok-Woo Lee

doi:https://doi.org/10.1016/j.scriptamat.2019.06.023

The effect of defects on strength of gold microparticles

Tyler J. Flanagan, Oleg Kovalenko, Eugen Rabkin, Seok-Woo Lee

Technion - Israel Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Mechanical properties of solid-state-dewetted Au microparticles were characterized by microcompression tests. Our results revealed that large Au microparticles exhibit a strong size effect in yield strength, while the strength of their smaller counterparts reaches saturation and is size-independent. We discuss these two regimes in terms of source-controlled plasticity with a theoretical strength limit. Our calculations capture the particles behavior observed in the experiment, as well as predict the effects of sample geometry on the scaling law. This work shows that the microparticles produced by solid-state-dewetting method represent a convenient model system to study dislocation plasticity at small length scales.

Original language	English
Pages (from-to)	83-86
Number of pages	4
Journal	Scripta Materialia
Volume	171
DOIs	https://doi.org/10.1016/j.scriptamat.2019.06.023
State	Published - Oct 2019

Keywords

Dislocation
Microcompression
Plasticity
Size effect
Strength

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
General Materials Science

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https://doi.org/10.1016/j.scriptamat.2019.06.023

Cite this

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title = "The effect of defects on strength of gold microparticles",

abstract = "Mechanical properties of solid-state-dewetted Au microparticles were characterized by microcompression tests. Our results revealed that large Au microparticles exhibit a strong size effect in yield strength, while the strength of their smaller counterparts reaches saturation and is size-independent. We discuss these two regimes in terms of source-controlled plasticity with a theoretical strength limit. Our calculations capture the particles behavior observed in the experiment, as well as predict the effects of sample geometry on the scaling law. This work shows that the microparticles produced by solid-state-dewetting method represent a convenient model system to study dislocation plasticity at small length scales.",

keywords = "Dislocation, Microcompression, Plasticity, Size effect, Strength",

author = "Flanagan, {Tyler J.} and Oleg Kovalenko and Eugen Rabkin and Seok-Woo Lee",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = oct,

doi = "https://doi.org/10.1016/j.scriptamat.2019.06.023",

language = "الإنجليزيّة",

volume = "171",

pages = "83--86",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "American Chemical Society",

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TY - JOUR

T1 - The effect of defects on strength of gold microparticles

AU - Flanagan, Tyler J.

AU - Kovalenko, Oleg

AU - Rabkin, Eugen

AU - Lee, Seok-Woo

PY - 2019/10

Y1 - 2019/10

N2 - Mechanical properties of solid-state-dewetted Au microparticles were characterized by microcompression tests. Our results revealed that large Au microparticles exhibit a strong size effect in yield strength, while the strength of their smaller counterparts reaches saturation and is size-independent. We discuss these two regimes in terms of source-controlled plasticity with a theoretical strength limit. Our calculations capture the particles behavior observed in the experiment, as well as predict the effects of sample geometry on the scaling law. This work shows that the microparticles produced by solid-state-dewetting method represent a convenient model system to study dislocation plasticity at small length scales.

AB - Mechanical properties of solid-state-dewetted Au microparticles were characterized by microcompression tests. Our results revealed that large Au microparticles exhibit a strong size effect in yield strength, while the strength of their smaller counterparts reaches saturation and is size-independent. We discuss these two regimes in terms of source-controlled plasticity with a theoretical strength limit. Our calculations capture the particles behavior observed in the experiment, as well as predict the effects of sample geometry on the scaling law. This work shows that the microparticles produced by solid-state-dewetting method represent a convenient model system to study dislocation plasticity at small length scales.

KW - Dislocation

KW - Microcompression

KW - Plasticity

KW - Size effect

KW - Strength

UR - http://www.scopus.com/inward/record.url?scp=85067839616&partnerID=8YFLogxK

U2 - https://doi.org/10.1016/j.scriptamat.2019.06.023

DO - https://doi.org/10.1016/j.scriptamat.2019.06.023

M3 - مقالة

SN - 1359-6462

VL - 171

SP - 83

EP - 86

JO - Scripta Materialia

JF - Scripta Materialia

ER -

The effect of defects on strength of gold microparticles

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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