Extrinsic size effect in microcompression of polycrystalline Cu/Fe multilayers

Jiangting Wang; Chunhui Yang; Peter D. Hodgson

doi:10.1016/j.scriptamat.2013.07.018

Extrinsic size effect in microcompression of polycrystalline Cu/Fe multilayers

Jiangting Wang, Chunhui Yang, Peter D. Hodgson

School of Engineering, Design & Built Environment

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

18 Citations (Scopus)

Abstract

Microcompression tests of Cu/Fe multilayers with diameters ranging from 0.6 to 2.0 lm show that the flow stress increases with increasing pillar diameter, which implies that "larger is stronger". Finite element analysis results explain the stress and strain distributions in the pillars, and suggest that the dimensional constraint is responsible for the strengthening. This work reveals a new mechanism of extrinsic size effect in polycrystalline multilayer pillars, which is opposite to the extrinsic size effect in single-crystal pillars.

Original language	English
Pages (from-to)	626-629
Number of pages	4
Journal	Scripta Materialia
Volume	69
Issue number	8
DOIs	https://doi.org/10.1016/j.scriptamat.2013.07.018
Publication status	Published - 2013

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10.1016/j.scriptamat.2013.07.018

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title = "Extrinsic size effect in microcompression of polycrystalline Cu/Fe multilayers",

abstract = "Microcompression tests of Cu/Fe multilayers with diameters ranging from 0.6 to 2.0 lm show that the flow stress increases with increasing pillar diameter, which implies that {"}larger is stronger{"}. Finite element analysis results explain the stress and strain distributions in the pillars, and suggest that the dimensional constraint is responsible for the strengthening. This work reveals a new mechanism of extrinsic size effect in polycrystalline multilayer pillars, which is opposite to the extrinsic size effect in single-crystal pillars.",

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T1 - Extrinsic size effect in microcompression of polycrystalline Cu/Fe multilayers

AU - Wang, Jiangting

AU - Yang, Chunhui

AU - Hodgson, Peter D.

PY - 2013

Y1 - 2013

N2 - Microcompression tests of Cu/Fe multilayers with diameters ranging from 0.6 to 2.0 lm show that the flow stress increases with increasing pillar diameter, which implies that "larger is stronger". Finite element analysis results explain the stress and strain distributions in the pillars, and suggest that the dimensional constraint is responsible for the strengthening. This work reveals a new mechanism of extrinsic size effect in polycrystalline multilayer pillars, which is opposite to the extrinsic size effect in single-crystal pillars.

AB - Microcompression tests of Cu/Fe multilayers with diameters ranging from 0.6 to 2.0 lm show that the flow stress increases with increasing pillar diameter, which implies that "larger is stronger". Finite element analysis results explain the stress and strain distributions in the pillars, and suggest that the dimensional constraint is responsible for the strengthening. This work reveals a new mechanism of extrinsic size effect in polycrystalline multilayer pillars, which is opposite to the extrinsic size effect in single-crystal pillars.

UR - http://handle.uws.edu.au:8081/1959.7/534399

U2 - 10.1016/j.scriptamat.2013.07.018

DO - 10.1016/j.scriptamat.2013.07.018

M3 - Article

SN - 1359-6462

VL - 69

SP - 626

EP - 629

JO - Scripta Materialia

JF - Scripta Materialia

IS - 8

ER -

Extrinsic size effect in microcompression of polycrystalline Cu/Fe multilayers

Abstract

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