Very-high-cycle fatigue crack initiation and propagation behaviours of magnesium alloy ZK60

Chao He; Yongjie Liu; Jiukai Li; Kun Yang; Qingyuan Wang; Qiang Chen

doi:10.1080/02670836.2017.1407556

Very-high-cycle fatigue crack initiation and propagation behaviours of magnesium alloy ZK60

Chao He, Yongjie Liu, Jiukai Li, Kun Yang, Qingyuan Wang, Qiang Chen

Faculty of Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

The aim of this paper is to assess the very-high-cycle fatigue (VHCF) behaviour of a magnesium alloy (ZK60). Results indicate that the fatigue crack initiates from an area consisting of many distributed facets, while the region of early crack propagation is characterised by parallel traces, based on a fractographic analysis. The significant differences in morphology around the crack initiation area result from the interaction between the deformation twinning and the plastic zone at the crack tip. In addition, the fatigue crack propagation rate around the crack initiation site is also estimated based on a modified Murakami model. It is found that the formation stage for the fatigue crack is of great importance to the fatigue failure mechanism in the VHCF regime.

Original language	English
Pages (from-to)	639-647
Number of pages	9
Journal	Materials Science and Technology (United Kingdom)
Volume	34
Issue number	6
DOIs	https://doi.org/10.1080/02670836.2017.1407556
Publication status	Published - Apr 13 2018

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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abstract = "The aim of this paper is to assess the very-high-cycle fatigue (VHCF) behaviour of a magnesium alloy (ZK60). Results indicate that the fatigue crack initiates from an area consisting of many distributed facets, while the region of early crack propagation is characterised by parallel traces, based on a fractographic analysis. The significant differences in morphology around the crack initiation area result from the interaction between the deformation twinning and the plastic zone at the crack tip. In addition, the fatigue crack propagation rate around the crack initiation site is also estimated based on a modified Murakami model. It is found that the formation stage for the fatigue crack is of great importance to the fatigue failure mechanism in the VHCF regime.",

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AU - He, Chao

AU - Liu, Yongjie

AU - Li, Jiukai

AU - Yang, Kun

AU - Wang, Qingyuan

AU - Chen, Qiang

PY - 2018/4/13

Y1 - 2018/4/13

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AB - The aim of this paper is to assess the very-high-cycle fatigue (VHCF) behaviour of a magnesium alloy (ZK60). Results indicate that the fatigue crack initiates from an area consisting of many distributed facets, while the region of early crack propagation is characterised by parallel traces, based on a fractographic analysis. The significant differences in morphology around the crack initiation area result from the interaction between the deformation twinning and the plastic zone at the crack tip. In addition, the fatigue crack propagation rate around the crack initiation site is also estimated based on a modified Murakami model. It is found that the formation stage for the fatigue crack is of great importance to the fatigue failure mechanism in the VHCF regime.

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