Formation of persistent dislocation loops by ultra-high strain-rate deformation during cold spraying

被引：104

作者：

Borchers, C ^{[1
]}

Gärtner, F ^{[1
]}

Stoltenhoff, T ^{[1
]}

Kreye, H ^{[1
]}

机构：

[1] Helmut Schmidt Univ, Dept Mech Engn, D-22039 Hamburg, Germany

来源：

ACTA MATERIALIA | 2005年 / 53卷 / 10期

关键词：

cold spraying; high-resolution electron microscopy; high-speed deformation; point defects; hardness;

D O I：

10.1016/j.actamat.2005.02.048

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pure copper was deformed at ultra-high strain-rates by the technique of cold spraying. It was found that after annealing the hardness of the samples does not fall as low as is known for heavily deformed copper at normal strain rates, e.g., cold rolling. The reason for this is the presence of defects that do not heal out after annealing at 600 degrees C. These defects were identified as dislocation loops of the extrinsic and intrinsic kind. Possible mechanisms for the formation of these loops are discussed. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2991 / 3000

页数：10

共 41 条

[1] Gas-dynamic spraying. Study of a plane supersonic two-phase jet [J].

Alkhimov A.P. ;

Klinkov S.V. ;

Kosarev V.F. ;

Papyrin A.N. .

Journal of Applied Mechanics and Technical Physics, 1997, 38 (2) :324-330

[2]

ALKHIMOV AP, 1998, J APPL MECH TECH PHY, V39, P318, DOI DOI 10.1007/BF02468100

[3] DYNAMIC RECRYSTALLIZATION IN HIGH-STRAIN, HIGH-STRAIN-RATE PLASTIC-DEFORMATION OF COPPER [J].

ANDRADE, U ;

MEYERS, MA ;

VECCHIO, KS ;

CHOKSHI, AH .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (09) :3183-3195

[4]

ARGON AS, 1996, PHYS METALLURGY, P1878

[5] Bonding mechanism in cold gas spraying [J].

Assadi, H ;

Gärtner, F ;

Stoltenhoff, T ;

Kreye, H .

ACTA MATERIALIA, 2003, 51 (15) :4379-4394

[6]

Atroshenko SA, 2001, RECRYSTALLIZATION AND GRAIN GROWTH, VOLS 1 AND 2, P931

[7] Microstructural bonding features of cold sprayed face centered cubic metals [J].

Borchers, C ;

Gärtner, F ;

Stoltenhoff, T ;

Kreye, H .

JOURNAL OF APPLIED PHYSICS, 2004, 96 (08) :4288-4292

[8] Microstructural and macroscopic properties of cold sprayed copper coatings [J].

Borchers, C ;

Gärtner, F ;

Stoltenhoff, T ;

Assadi, H ;

Kreye, H .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (12) :10064-10070

[9]

BORCHERS C, 2002, MATER RES SOC S P, V673, P7

[10]

CAHN RW, 1996, PHYS METALLURGY, P2401

← 1 2 3 4 5 →