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On the Precipitates Dependence of Serration Type and Transition

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Abstract:

Serration behavior of 2090 Al-Li alloy was studied by tensile test combined with modifying the structure of δ-precipitates through reversion heat treatment. The serration type was strongly affected by the structure of δ-precipitates in the alloy matrix. With decreasing the amount and increasing the spacing of δ-precipitates, type A and type B serrations disappear, whilst type C serrations become dominant gradually. The serration behavior in the 2090Al-Li alloy can be attributed to the shearing of δ-precipitates by mobile dislocations during tensile plastic deformation.

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Applied Mechanics, Materials and Manufacturing View Preview

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Periodical:

Applied Mechanics and Materials (Volume 378)

Pages:

313-317

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.378.313

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Online since:

August 2013

Authors:

Yin Zhong Shen

Keywords:

2090 Al-Li Alloy, Reversion Heat Treatment, Serration, Tensile Test, δ-Precipitate

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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