Fatigue life of fine-grain Al–Mg–Sc alloys produced by equal-channel angular pressing

Fatigue life of fine-grain Al–Mg–Sc alloys produced by equal-channel angular pressing

The effect of severe plastic deformation through equal-channel angular pressing (ECAP) on the fatigue life of Al–Mg–Sc alloys with different concentration of magnesium is discussed. Both high-cyclic and low-cyclic fatigue properties have been assessed in terms of the fatigue strength, fatigue ductil...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 349; no. 1-2; pp. 318 - 326
Main Authors: Vinogradov, A, Washikita, A, Kitagawa, K, Kopylov, V.I
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 25-05-2003
Elsevier
Subjects:
Aluminium alloys
Applied sciences
Exact sciences and technology
Fatigue
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Severe plastic deformation
Aluminium alloys
Fatigue
Severe plastic deformation
Fatigue life
High strain
Aluminium base alloys
Ductility
Stress strain relation
Plastic deformation
Experimental study
Grain refining
Fatigue strength
Pressing
Fine grain structure
Chemical composition
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Summary:The effect of severe plastic deformation through equal-channel angular pressing (ECAP) on the fatigue life of Al–Mg–Sc alloys with different concentration of magnesium is discussed. Both high-cyclic and low-cyclic fatigue properties have been assessed in terms of the fatigue strength, fatigue ductility, cyclic stress–strain curves, etc. It is shown that the addition of Sc significantly increases the thermal stability of the fine-grain structure formed during ECAP. However, only modest improvement of tensile and cyclic mechanical properties have been achieved via ECAP of Al–Mg–Sc alloys in comparison to their ordinarily fabricated counterparts. The results of present investigation show that the grain refinement of precipitation hardenable Al-alloys through severe plastic deformation can not be effective for enhancement of their static or cyclic strength. It is argued that early shear banding play an important role in cyclic degradation of ECAP Al–Mg–Sc alloys.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0921-5093
1873-4936
DOI:10.1016/S0921-5093(02)00813-4