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A Study on Fatigue Properties of Sc Added Al 2519 Alloy

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Abstract:

The high cycle fatigue properties of two kinds of wrought Al 2519 alloys without and with scandium of 0.10% were investigated. The fatigue strength was determined at R = 0.1 under constant amplitude loading conditions in air. The alloy with scandium of 0.10% showed a little lower tensile yield strength and higher fatigue strength values. The fine grained Al-0.10Sc alloy exhibited a higher resistance against fatigue crack nucleation despite the lower yield stress in comparison to the coarse grained Al 2519 alloy. The results can be explained mainly with the microstructural differences between both alloys. This results are due to the presence of coherent Al3 (Sc, Zr) precipitates and a very fine subgrain structure.

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Periodical:

Key Engineering Materials (Volumes 297-300)

Pages:

2483-2488

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.297-300.2483

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Online since:

November 2005

Authors:

Un Bong Baek, Jong Seo Park, In Hyun Chung, Seung Hoon Nahm, Young Hwa Ma, Yong Yun Lee

Keywords:

AA2519 , Fatigue Strength, High Cycle Fatigue (HCF), Sc Added Aluminum Alloy

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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References

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