TY - JOUR
T1 - Very-high-cycle fatigue crack initiation and propagation behaviours of magnesium alloy ZK60
AU - He, Chao
AU - Liu, Yongjie
AU - Li, Jiukai
AU - Yang, Kun
AU - Wang, Qingyuan
AU - Chen, Qiang
N1 - Funding Information:
This research was financially supported by the National Natural Science Foundation of China [grant numbers 11602038, 11572057], and the support of Grant-in Aid for JSPS Postdoctoral Fellowship for Overseas Researchers (P16809) is very much appreciated.
Publisher Copyright:
© 2017 Institute of Materials, Minerals and Mining.
PY - 2018/4/13
Y1 - 2018/4/13
N2 - 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.
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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U2 - 10.1080/02670836.2017.1407556
DO - 10.1080/02670836.2017.1407556
M3 - Article
AN - SCOPUS:85035788151
VL - 34
SP - 639
EP - 647
JO - Materials Science and Technology
JF - Materials Science and Technology
SN - 0267-0836
IS - 6
ER -