Surface Characteristics and High Cycle Fatigue Performance of Shot Peened Magnesium Alloy ZK60 | Zendy

Jie Dong | Zendy; Wencai Liu | Zendy; Wenjiang Ding | Zendy; Jianxin Zou | Zendy

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Surface Characteristics and High Cycle Fatigue Performance of Shot Peened Magnesium Alloy ZK60

Author(s) -

Jie Dong,

Wencai Liu,

Wenjiang Ding,

Jianxin Zou

Publication year - 2011

Publication title -

journal of metallurgy

Language(s) - English

Resource type - Journals

eISSN - 1687-9473

pISSN - 1687-9465

DOI - 10.1155/2011/682191

Subject(s) - shot peening , materials science , peening , nucleation , metallurgy , residual stress , fatigue limit , alloy , magnesium alloy , magnesium , shot (pellet) , chemistry , organic chemistry

The current work investigated the effect of shot peening (SP) on high cycle fatigue (HCF) behavior of the hot-extruded ZK60 magnesium alloy. SP can significantly improve the fatigue life of the ZK60 alloy. After SP at the optimum Almen intensities, the fatigue strength at 107 cycles in the as-extruded (referred to as ZK60) and the T5 aging-treated (referred to as ZK60-T5) alloys increased from 140 and 150 MPa to 180 and 195 MPa, respectively. SP led to a subsurface fatigue crack nucleation in both ZK60 and ZK60-T5 alloys. The mechanism by which the compressive residual stress induced by shot peening results in the improvement of fatigue performance for ZK60 and ZK60-T5 alloys was discussed

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