Discerning size effect strengthening in ultrafine-grained Mg thin films

被引：25

作者：

Sharon, J. A. ^{[1
,2
]}

Zhang, Y. ^{[2
]}

Mompiou, F. ^{[3
,4
]}

Legros, M. ^{[3
,4
]}

Hemker, K. J. ^{[2
]}

机构：

[1] Sandia Natl Labs, Albuquerque, NM 87185 USA

[2] Johns Hopkins Univ, Baltimore, MD 21218 USA

[3] CEMES CNRS, Toulouse, France

[4] Univ Toulouse, Toulouse, France

来源：

SCRIPTA MATERIALIA | 2014年 / 75卷

关键词：

Size effect; Mechanical properties; Hall-Petch strengthening; Hexagonal; Thin films; MAGNESIUM SINGLE-CRYSTALS; DEFORMATION-BEHAVIOR; IN-SITU; PRISMATIC GLIDE; MICROCOMPRESSION; COMPRESSION; ORIENTATION; TEMPERATURE; METALS; ALLOY;

D O I：

10.1016/j.scriptamat.2013.10.016

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Microtensile experiments have been performed to elucidate the mechanical response of ultrafine-grained Mg thin films. Strengths of 160 MPa and elongations up to 8% were measured. Post-deformation electron microscopy indicates a lack of intragranular dislocation confinement. While strength does increase with decreasing grain size, the size effect for hexagonal Mg is not as strong as that reported for face-centered cubic metals. Strength appears to be governed by a lack of dislocation pile-up as well as texture and Peierls effects. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：10 / 13

页数：4

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