Behavior of a Submicrocrystalline Aluminum Alloy 1570 under Conditions of Cyclic Loading

被引：13

作者：

Avtokratova, E. V. ^{[1
]}

Sitdikov, O. Sh. ^{[1
,2
]}

Kaibyshev, R. O. ^{[3
]}

Watanabe, Y. ^{[2
]}

机构：

[1] Inst Problems Superplast Met, Ufa 450001, Bashkortostan, Russia

[2] Nagoya Inst Technol, Nagoya, Aichi 4668555, Japan

[3] Belgorod State Univ, Belgorod 308034, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2009年 / 107卷 / 03期

关键词：

SEVERE PLASTIC-DEFORMATION; FATIGUE-CRACK PROPAGATION; FINE-GRAINED STRUCTURE; LOW-CARBON STEEL; AL-MG ALLOY; SUPERPLASTIC DEFORMATION; NANOCRYSTALLINE METALS; MECHANICAL-PROPERTIES; STRENGTH; GROWTH;

D O I：

10.1134/S0031918X09030119

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A study of the resistance to fatigue-crack growth in a submicrocrystalline alloy Al-6% Mg-0.3% Sc-0.4% Mn in combination with a precision analysis of the fracture surface of the samples has been performed. A comparison of crack resistance between coarse-grained and submicrocrystalline states of this alloy showed that only at the stage of near-threshold crack growth the velocity of fatigue-crack propagation in the submicrocrystalline state proves to be higher than that in the coarse-grained state. At the stage of linear crack growth, the fatigue-crack propagation becomes insensitive to the grain size. Upon transition to the stage of accelerated crack growth, the velocity of crack propagation in the submicrocrystalline alloy is retarded. A fractographic analysis of the fracture surface of the samples indicates that the retardation of the fatigue-crack growth in the submicrocrystalline alloy is connected with a gradual transition from the intercrystalline to the transcrystalline mechanism of fatigue fracture of the material.

引用

页码：291 / 297

页数：7

共 33 条

[1]

[Anonymous], T ASME J BASIC ENG

[2]

AVTOKRATOVA EV, 2007, P ALL RUSS SCH C STU, V3, P18

[3]

BOTVINA LR, 1989, KINETICS FAILURE STR

[4] Fatigue crack propagation behaviour in ultra-fine grained low carbon steel [J].

Chapetti, MD ;

Miyata, H ;

Tagawa, T ;

Miyata, T ;

Fujioka, A .

INTERNATIONAL JOURNAL OF FATIGUE, 2005, 27 (03) :235-243

[5] Improvement of high-cycle fatigue life in a 6061 Al alloy produced by equal channel angular pressing [J].

Chung, CS ;

Kim, JK ;

Kim, HK ;

Kim, WJ .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 337 (1-2) :39-44

[6] 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

[7] Condition and ways for raising crack resistance of high-strength aluminum alloys [J].

Elagin, VI .

METAL SCIENCE AND HEAT TREATMENT, 2002, 44 (9-10) :371-380

[8] Effect of equal channel angular pressing on tensile properties and fracture modes of casting Al-Cu alloys [J].

Fang, D. R. ;

Zhang, Z. F. ;

Wu, S. D. ;

Huang, C. X. ;

Zhang, H. ;

Zhao, N. Q. ;

Li, J. J. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 426 (1-2) :305-313

[9]

Filatov Yu.A., 2003, TEKHNOL LEGKIKH SPLA, P24

[10] Fatigue crack growth behaviour in aluminium alloy 7475 under different aging conditions [J].

Gürbüz, R ;

Sarioglu, F .

MATERIALS SCIENCE AND TECHNOLOGY, 2001, 17 (12) :1539-1543

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