Effect of dislocation hardening on monotonic and cyclic strength of severely deformed copper

被引：17

作者：

Vinogradov, A. ^{[1
]}

Maruyama, M. ^{[1
]}

Kaneko, Y. ^{[1
]}

Hashimoto, S. ^{[1
]}

机构：

[1] Osaka City Univ, Dept Intelligent Mat Engn, Osaka 5588585, Japan

来源：

PHILOSOPHICAL MAGAZINE | 2012年 / 92卷 / 06期

关键词：

equal channel angular pressing; fatigue; copper; electron backscattering diffraction; dislocation structure; CHANNEL ANGULAR EXTRUSION; SEVERE PLASTIC-DEFORMATION; SINGLE-CRYSTALS; STRAIN LOCALIZATION; FATIGUE BEHAVIOR; GRAIN-SIZE; MICROSTRUCTURE EVOLUTION; TEXTURE DEVELOPMENT; METALS; ORIENTATION;

D O I：

10.1080/14786435.2011.630693

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present study aims at clarifying the role of dislocation strengthening in fatigue of materials manufactured by severe plastic deformation (SPD) techniques. Employment of single crystals hardened via equal channel angular pressing (ECAP) helps to minimise or completely eliminate the effect of high angle boundaries on strengthening and fatigue behaviour. Both monotonic strength and high cycle fatigue (HCF) resistance were improved significantly after the first ECAP pressing, when low-angle dislocation configurations dominate in the microstructure. The essential role of dislocation accumulation during severe plastic deformation is highlighted for both tensile and fatigue strength (SPD). Dilute alloying of copper by silver stabilises the deformation microstructure and further improves the fatigue properties considerably.

引用

页码：666 / 689

页数：24

共 85 条

[1] Cyclic softening of ultrafine grain copper [J].

Agnew, SR ;

Weertman, JR .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 244 (02) :145-153

[2] Overview of fatigue performance of Cu processed by severe plastic deformation [J].

Agnew, SR ;

Vinogradov, AY ;

Hashimoto, S ;

Weertman, JR .

JOURNAL OF ELECTRONIC MATERIALS, 1999, 28 (09) :1038-1044

[3] ORIENTATION SPLITTING OF CUBE-ORIENTED FACE-CENTERED CUBIC-CRYSTALS IN PLANE-STRAIN COMPRESSION [J].

AKEF, A ;

DRIVER, JH .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1991, 132 :245-255

[4] Severe plastic deformation (SPD) processes for metals [J].

Azushima, A. ;

Kopp, R. ;

Korhonen, A. ;

Yang, D. Y. ;

Micari, F. ;

Lahoti, G. D. ;

Groche, P. ;

Yanagimoto, J. ;

Tsuji, N. ;

Rosochowski, A. ;

Yanagida, A. .

CIRP ANNALS-MANUFACTURING TECHNOLOGY, 2008, 57 (02) :716-735

[5] Deformation banding mechanisms during plane strain compression of cube-oriented f.c.c. crystals [J].

Basson, F ;

Driver, JH .

ACTA MATERIALIA, 2000, 48 (09) :2101-2115

[6] Characteristics of face-centered cubic metals processed by equal-channel angular pressing [J].

Chinh, N. Q. ;

Gubicza, J. ;

Langdon, T. G. .

JOURNAL OF MATERIALS SCIENCE, 2007, 42 (05) :1594-1605

[7] Microstructures and properties of copper processed by equal channel angular extrusion for 1-16 passes [J].

Dalla Torre, F ;

Lapovok, R ;

Sandlin, J ;

Thomson, PF ;

Davies, CHJ ;

Pereloma, EV .

ACTA MATERIALIA, 2004, 52 (16) :4819-4832

[8] Modelling of the evolution of dislocation cell misorientation under severe plastic deformation [J].

Estrin, Y ;

Tóth, LS ;

Brechet, Y ;

Kim, HS .

NANOMATERIALS BY SEVERE PLASTIC DEFORMATION, 2006, 503-504 :675-680

[9] A dislocation-based model for all hardening stages in large strain deformation [J].

Estrin, Y ;

Toth, LS ;

Molinari, A ;

Brechet, Y .

ACTA MATERIALIA, 1998, 46 (15) :5509-5522

[10] Modelling microstructure evolution towards ultrafine crystallinity produced by severe plastic deformation [J].

Estrin, Yuri ;

Kim, Hyoung Seop .

JOURNAL OF MATERIALS SCIENCE, 2007, 42 (21) :9092-9096

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