Mechanical behaviour and in situ observation of shear bands in ultrafine grained Pd and Pd-Ag alloys

被引：47

作者：

Yang, K. ^{[1
]}

Ivanisenko, Yu. ^{[2
]}

Caron, A. ^{[1
]}

Chuvilin, A.

Kurmanaeva, L. ^{[2
]}

Scherer, T. ^{[2
]}

Valiev, R. Z. ^{[3
]}

Fecht, H. -J ^{[1
,2
]}

机构：

[1] Univ Ulm, Inst Mikro & Nanomat, D-89081 Ulm, Germany

[2] Forschungszentrum Karlsruhe, Inst Nanotechnol, Karlsruhe, Germany

[3] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa, Russia

来源：

ACTA MATERIALIA | 2010年 / 58卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

In situ tensile test; Grey scale correlation analysis; Ultrafine grained materials; High-pressure torsion; SEVERE PLASTIC-DEFORMATION; SCANNING FORCE MICROSCOPY; STACKING-FAULT ENERGY; NANOCRYSTALLINE MATERIALS; TENSILE DUCTILITY; NANOSTRUCTURED METAL; ALUMINUM-ALLOY; IRON; CU; MODE;

D O I：

10.1016/j.actamat.2009.10.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An in situ tensile test with grey scale correlation has been performed to study the deformation process in ultrafine grained (UFG) Pd and Pd-x at.% Ag (x = 5 or 20) alloys produced by high-pressure torsion. Shear band nucleation and propagation was found to be an important deformation mechanism after strain localization during the tensile test. The underlying microscopic mechanism is related to cooperative grain boundary sliding. Moreover, the additional influence of stacking fault energy was found to change the nature of the deformation mechanism from localized strain in Pd to more homogeneous deformation in Pd-20% Ag. In situ analysis and the findings are new and give innovative insight into the basics of deformation in UFG face-centred cubic metals. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：967 / 978

页数：12

共 50 条

[1]

AERNOUDT E, 1993, MAT SCI TECHNOLOGY, V6

[2] ATOMIC FORCE MICROSCOPE [J].

BINNIG, G ;

QUATE, CF ;

GERBER, C .

PHYSICAL REVIEW LETTERS, 1986, 56 (09) :930-933

[3] GLASSLIKE BEHAVIOR IN A NANOSTRUCTURED FE/CU ALLOY [J].

CARSLEY, JE ;

MILLIGAN, WW ;

HACKNEY, SA ;

AIFANTIS, EC .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1995, 26 (09) :2479-2481

[4] Mechanical behavior of a bulk nanostructured iron alloy [J].

Carsley, JE ;

Fisher, A ;

Milligan, WW ;

Aifantis, EC .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (09) :2261-2271

[5] Tensile properties of in situ consolidated nanocrystalline Cu [J].

Cheng, S ;

Ma, E ;

Wang, YM ;

Kecskes, LJ ;

Youssef, KM ;

Koch, CC ;

Trociewitz, UP ;

Han, K .

ACTA MATERIALIA, 2005, 53 (05) :1521-1533

[6] On the effect of Ag content on the deformation behavior of ultrafine-grained Pd-Ag alloys [J].

Choi, In-suk ;

Schwaiger, Ruth ;

Kurmanaeva, Lilia ;

Kraft, Oliver .

SCRIPTA MATERIALIA, 2009, 61 (01) :64-67

[7] STACKING-FAULT ENERGIES OF RANDOM METALLIC ALLOYS [J].

CRAMPIN, S ;

VVEDENSKY, DD ;

MONNIER, R .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1993, 67 (06) :1447-1457

[8] Toward a quantitative understanding of mechanical behavior of nanocrystalline metals [J].

Dao, M. ;

Lu, L. ;

Asaro, R. J. ;

De Hosson, J. T. M. ;

Ma, E. .

ACTA MATERIALIA, 2007, 55 (12) :4041-4065

[9]

DOST M, 2003, P SPIE, V5048

[10]

Elias H., 1983, GUIDE PRACTICAL STER

← 1 2 3 4 5 →