Fatigue crack initiation of magnesium alloys under elastic stress amplitudes: A review

doi:10.1007/s11465-018-0482-1

Frontiers of Mechanical Engineering

2019, Vol. 14

Issue (1): 113-127 https://doi.org/10.1007/s11465-018-0482-1

本期目录

Fatigue crack initiation of magnesium alloys under elastic stress amplitudes: A review

B. J. WANG¹, D. K. XU²(

), S. D. WANG², E. H. HAN²

¹. School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China
². CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

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Abstract：

The most advantageous property of magnesium (Mg) alloys is their density, which is lower compared with traditional metallic materials. Mg alloys, considered the lightest metallic structural material among others, have great potential for applications as secondary load components in the transportation and aerospace industries. The fatigue evaluation of Mg alloys under elastic stress amplitudes is very important in ensuring their service safety and reliability. Given their hexagonal close packed structure, the fatigue crack initiation of Mg and its alloys is closely related to the deformation mechanisms of twinning and basal slips. However, for Mg alloys with shrinkage porosities and inclusions, fatigue cracks will preferentially initiate at these defects, remarkably reducing the fatigue lifetime. In this paper, some fundamental aspects about the fatigue crack initiation mechanisms of Mg alloys are reviewed, including the 3 followings: 1) Fatigue crack initiation of as-cast Mg alloys, 2) influence of microstructure on fatigue crack initiation of wrought Mg alloys, and 3) the effect of heat treatment on fatigue initiation mechanisms. Moreover, some unresolved issues and future target on the fatigue crack initiation mechanism of Mg alloys are also described.

Key words： Mg alloys fatigue behavior microstructure crack initiation deformation mechanism

收稿日期: 2017-05-04 出版日期: 2018-11-30

Corresponding Author(s): D. K. XU

引用本文:

. [J]. Frontiers of Mechanical Engineering, 2019, 14(1): 113-127.
B. J. WANG, D. K. XU, S. D. WANG, E. H. HAN. Fatigue crack initiation of magnesium alloys under elastic stress amplitudes: A review. Front. Mech. Eng., 2019, 14(1): 113-127.

链接本文:

https://academic.hep.com.cn/fme/CN/10.1007/s11465-018-0482-1
https://academic.hep.com.cn/fme/CN/Y2019/V14/I1/113

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