On plasticity and fracture of nano structured Cu/X (X = Au, Cr) multilayers: The effects of length scale and interface/boundary

被引：105

作者：

Li, Y. P. ^{[1
]}

Zhang, G. P. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

ACTA MATERIALIA | 2010年 / 58卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Multilayers; Plastic deformation; Fracture; Length scale; Interface; THIN-FILMS; MECHANICAL-PROPERTIES; METALLIC MULTILAYERS; AG/CU MULTILAYERS; COMPOSITES; DEFORMATION; NANOCRYSTALLINE; STRENGTH; BEHAVIOR; NANOINDENTATION;

D O I：

10.1016/j.actamat.2010.03.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Plastic deformation and fracture behavior of two different types of Cu/X (X = Au, Cr) multilayers subjected to tensile stress were investigated via three-point bending experiments. It was found that the plastic deformation ability and fracture mode depended on layer thickness and interface/boundary. The Cu/Au multilayer showed significant features of plastic flow before fracture, and such plasticity was gradually suppressed by premature unstable shearing across the layer interface with decreasing layer thickness. In comparison, Cu/Cr multilayers were prone to a quasi-brittle normal fracture with decreasing layer thickness. Both experimental observations and theoretical analyses revealed differences in plasticity and fracture mode between the two types of metallic multilayers and the relevant physical mechanism transition due to length scale constraint and interface/boundary blocking of dislocation motion. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：3877 / 3887

页数：11

共 35 条

[1]

[Anonymous], 1986, BINARY ALLOY PHASE D

[2] Overview no. 130 - Size effects in materials due to microstructural and dimensional constraints: A comparative review [J].

Arzt, E .

ACTA MATERIALIA, 1998, 46 (16) :5611-5626

[3] Sputter deposited nanocrystalline Ni-25Al alloy thin films and Ni/Ni3Al multilayers [J].

Banerjee, R ;

Thompson, GB ;

Anderson, PM ;

Fraser, HL .

THIN SOLID FILMS, 2003, 424 (01) :93-98

[4]

BARNETT SA, 1994, ANNU REV MATER SCI, V24, P481

[5] Structure and strength of multilayers [J].

Clemens, BM ;

Kung, H ;

Barnett, SA .

MRS BULLETIN, 1999, 24 (02) :20-26

[6] Suppression of the shear band instability during plastic flow of nanometer-scale confined metallic glasses [J].

Donohue, A. ;

Spaepen, F. ;

Hoagland, R. G. ;

Misra, A. .

APPLIED PHYSICS LETTERS, 2007, 91 (24)

[7] ON DISLOCATION STORAGE AND THE MECHANICAL RESPONSE OF FINE-SCALE MICROSTRUCTURES [J].

EMBURY, JD ;

HIRTH, JP .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (06) :2051-2056

[8]

Geisler H, 1999, PHILOS MAG A, V79, P485, DOI 10.1080/01418619908210311

[9] Slip resistance of interfaces and the strength of metallic multilayer composites [J].

Hoagland, RG ;

Kurtz, RJ ;

Henager, CH .

SCRIPTA MATERIALIA, 2004, 50 (06) :775-779

[10] Tensile testing of free-standing Cu, Ag and Al thin films and Ag/Cu multilayers [J].

Huang, HB ;

Spaepen, F .

ACTA MATERIALIA, 2000, 48 (12) :3261-3269

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