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Journal of Materials Engineering and Performance

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29-10-2019

Microstructure and Three-Point Bending Fatigue Behavior of Al-Cu-Mg-Ag Alloys with Various Mg Contents

Authors: Jian Wang, Zhiyi Liu, Song Bai, Jing Cao, Juangang Zhao, Diping Zeng

Published in: Journal of Materials Engineering and Performance | Issue 11/2019

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Abstract

This paper presents an investigation on the influence of Mg content on the microstructures, tensile properties and three-point bending fatigue behavior of Al-Cu-Mg-Ag alloys. The results indicate that the alloy containing 0.70 wt.% Mg possesses lower tensile properties and higher fatigue performance compared to the one with 1.15 wt.% Mg. Increasing Mg content in Al-Cu-Mg-Ag alloys can enhance the nucleation and precipitation of Ω phase, as well as increase the volume fraction and number density of constituent particles. The investigation of the fatigue crack initiation and growth behavior of Al-Cu-Mg-Ag alloy using interrupted fatigue tests suggests that micro-cracks mainly nucleate on Al₂Cu constituent particles and the fatigue life is mainly associated with the density of constituent particles.

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Title: Microstructure and Three-Point Bending Fatigue Behavior of Al-Cu-Mg-Ag Alloys with Various Mg Contents
Authors: Jian Wang
Zhiyi Liu
Song Bai
Jing Cao
Juangang Zhao
Diping Zeng
Publication date: 29-10-2019
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 11/2019
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-019-04413-4

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