The Effect of Microstructure on the Very High Cycle Fatigue Behavior of Ti-6Al-4V Alloy

The Effect of Microstructure on the Very High Cycle Fatigue Behavior of Ti-6Al-4V Alloy

Crack initiation plays a major role in very high cycle fatigue (VHCF) life, and the initiation of cracks is related to slip behavior. There is a need for improvement in the understanding of the influence of Ti-6Al-4V microstructures on VHCF performance and crack initiation modes. In this study, thro...

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Veröffentlicht in:Metals (Basel ) 2024-03, Vol.14 (3), p.254
Hauptverfasser: Yuan, Mingyang, Zhao, Xinbao, Yue, Quanzhao, Gu, Yuefeng, Zhang, Ze
Format: Artikel
Sprache:eng
Schlagworte:
Alloys
Analysis
Cooling
Crack initiation
Fatigue
Fatigue failure
Fatigue testing machines
Fracture mechanics
Heat treating
High cycle fatigue
Load
Materials
Materials fatigue
Metal fatigue
Microstructure
Microtexture
Stress concentration
Ti-6Al-4V alloy
Titanium alloys
Titanium base alloys
very high cycle fatigue
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Zusammenfassung:Crack initiation plays a major role in very high cycle fatigue (VHCF) life, and the initiation of cracks is related to slip behavior. There is a need for improvement in the understanding of the influence of Ti-6Al-4V microstructures on VHCF performance and crack initiation modes. In this study, through an investigation of Ti-6Al-4V VHCF in equiaxed and bimodal microstructures, two different crack initiation modes were identified. The change in crack initiation mode is related to the variation in microtexture, for which a corresponding model is proposed. The VHCF performance of the bimodal microstructure is significantly improved compared to that of the equiaxed microstructure.
ISSN:2075-4701
2075-4701
DOI:10.3390/met14030254