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Impacts of Mineralogy on Soluble Phosphorus Concentrations During Low Temperature Processing of Jamaican Bauxites Read chapter Read first chapter

2020 | OriginalPaper | Chapter

High Cycle Fatigue Properties of the Zr-Modified Al–Si–Cu–Mg Alloy at Elevated Temperatures

Authors : Guangyu Liu, Paul Blake, Shouxun Ji

Published in: Light Metals 2020

Publisher: Springer International Publishing

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Abstract

The Al–Si–Cu–Mg alloy with 0.14 wt%Zr addition has been studied against the counterparts of commercially used EN-AC-42000 (Al7Si0.5Cu) baseline alloy for the effect of Zr on the high cycle fatigue (HCF) properties at elevated temperatures. It was found that the fatigue life was significantly improved by 8-10 times at the high stress amplitude of 140 MPa in the Zr-modified alloy at all different temperatures. The fatigue strength coefficient, \( \sigma_{f}^{{\prime }} \), of the baseline alloy was 574.9, 589.8, and 514.8 MPa at 150, 200, and 250 °C, respectively, which was greatly increased to 1412.3, 620.1, and 821.6 MPa for the Zr-modified alloy. The improved fatigue properties could be mainly ascribed to: (1) the refined microstructure, with α-Al grain size decreasing from 335 ± 18 to 253 ± 41 μm and the secondary dendrite arm spacing (SDAS) dropping from 39 to 28 μm; (2) the reduced porosity; and (3) the additional precipitates strengthening effect by the Al–Si–Zr–Ti dispersoids.

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previous chapter Retrogression Forming and Reaging of AA7075-T6 Alclad to Produce Stampings with Peak Strength
next chapter Effect of Mo on Elevated-Temperature Low-Cycle Fatigue Behavior of Al-Si 356 Cast Alloy
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Metadata
Title
High Cycle Fatigue Properties of the Zr-Modified Al–Si–Cu–Mg Alloy at Elevated Temperatures
Authors
Guangyu Liu
Paul Blake
Shouxun Ji
Copyright Year
2020
Book
Light Metals 2020

Print ISBN: 978-3-030-36407-6

Electronic ISBN: 978-3-030-36408-3

Copyright Year: 2020

DOI
https://doi.org/10.1007/978-3-030-36408-3_36

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