Very-high-cycle fatigue crack initiation and propagation behaviours of magnesium alloy ZK60
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 01, 2018
- Source ID
- 10.1080/02670836.2017.1407556
Entities
People
- Chao He
- Jiukai Li
- Kun Yang
- Qiang Chen
- Qingyuan Wang
- Yongjie Liu
Organizations
- Chengdu University
- Intelligence Community Postdoctoral Research Fellowship Program
- Kyushu University
- National Natural Science Foundation of China
- Sichuan University