Influence of strain rate & temperature on the mechanical response of ultrafine-grained Cu, Ni, AND Al-4Cu-0.5Zr

被引：163

作者：

Gray, GT ^{[1
]}

Lowe, TC ^{[1
]}

Cady, CM ^{[1
]}

Valiev, RZ ^{[1
]}

Aleksandrov, IV ^{[1
]}

机构：

[1] UFA STATE AVIAT TECH UNIV,UFA,RUSSIA

来源：

NANOSTRUCTURED MATERIALS | 1997年 / 9卷 / 1-8期

关键词：

D O I：

10.1016/S0965-9773(97)00104-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper the mechanical properties of three bulk ultrafine-grained (UFG) materials produced by Equal Channel Angular Pressing (EGA) are presented. Although the influence of strain rate and temperature on the mechanical behavior of pure Cu and Ni and a variety of their alloys has been extensively studied, the effect of strain rate and temperature on nanocrystalline materials remains poorly understood. In this paper the influence of strain rate, varied between 0.001 and similar to 4500 s(-1), and temperature on the compressive mechanical behavior of UFG- Cu, Ni, and Al-4Cu-0.5Zr is shown. The temperature and strain-rate sensitivity of all three metals was found to be significantly higher than that typical for annealed FCC polycrystalline metals. The yield strength values measured for the UFG-Cu and Ni were found to lie both above those extrapolated for classical Hall-Fetch data on these materials supporting the importance of substructure, in addition to average grain size, to yield strength. (C) 1997 Acta Metallurgica Inc.

引用

页码：477 / 480

页数：4

共 11 条

[1] ON THE MECHANISM OF WORK HARDENING IN FACE-CENTRED CUBIC METALS, WITH SPECIAL REFERENCE TO POLYCRYSTALLINE COPPER [J].

FELTHAM, P ;

MEAKIN, JD .

PHILOSOPHICAL MAGAZINE, 1957, 2 (13) :105-112

[2]

Folansbee P.S., 1985, ASM HDB AM SOC METAL, V8, P198

[3] ON THE STRUCTURE AND STRENGTH OF ULTRAFINE-GRAINED COPPER PRODUCED BY SEVERE PLASTIC-DEFORMATION [J].

GERTSMAN, VY ;

BIRRINGER, R ;

VALIEV, RZ ;

GLEITER, H .

SCRIPTA METALLURGICA ET MATERIALIA, 1994, 30 (02) :229-234

[4] FLOW-STRESS OF OFE COPPER AT STRAIN RATES FROM 10-3 TO 104S-1 - GRAIN-SIZE EFFECTS AND COMPARISON TO THE MECHANICAL THRESHOLD STRESS MODEL [J].

GOURDIN, WH ;

LASSILA, DH .

ACTA METALLURGICA ET MATERIALIA, 1991, 39 (10) :2337-2348

[5]

KOCKS UF, 1985, DISLOCATIONS PROPERT, P125

[6]

SURYANARAYANA C, 1995, INT MATER REV, V40, P41, DOI 10.1179/095066095790151106

[7] EFFECT OF GRAIN-SIZE ON WORK-HARDENING IN NICKEL [J].

THOMPSON, AW .

ACTA METALLURGICA, 1977, 25 (01) :83-86

[8] DEFORMATION-BEHAVIOR OF ULTRA-FINE-GRAINED COPPER [J].

VALIEV, RZ ;

KOZLOV, EV ;

IVANOV, YF ;

LIAN, J ;

NAZAROV, AA ;

BAUDELET, B .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (07) :2467-2475

[9] PLASTIC-DEFORMATION OF ALLOYS WITH SUBMICRON-GRAINED STRUCTURE [J].

VALIEV, RZ ;

KRASILNIKOV, NA ;

TSENEV, NK .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1991, 137 :35-40

[10] STRUCTURE AND PROPERTIES OF ULTRAFINE-GRAINED MATERIALS PRODUCED BY SEVERE PLASTIC-DEFORMATION [J].

VALIEV, RZ ;

KORZNIKOV, AV ;

MULYUKOV, RR .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1993, 168 (02) :141-148

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