Evaluation of Very High Cycle Fatigue Properties of β-Titanium Alloy by Using an Ultrasonic Tensile-Compressive Fatigue Testing Machine

Abstract:

β-titanium alloy has been developed recently because β-titanium alloy has better cold workability, proof stress, and tensile strength. In order to use β-titanium alloy for automobile parts subject to cyclic loading, very high cycle fatigue properties of β-titanium alloy should be investigated. In this study, very high cycle fatigue properties of β-titanium alloy Ti-22V-4Al were evaluated by using an ultrasonic fatigue testing method, which allows us to reduce a fatigue testing period to 1/100 − 1/1000 of that by using conventional testing methods. An S-N diagram and fracture morphology of Ti-22V-4Al in the very high cycle region were investigated. Fatigue failure was observed and subsurface fracture occurred in the very high cycle region.

• Periodical: Key Engineering Materials (Volume 725)
• Pages: 366-371
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.725.366
• Online since: December 2016
• Authors: Reo Kasahara*, Masato Nishikawa, Yoshinobu Shimamura, Keiichiro Tohgo, Tomoyuki Fujii
• Keywords: Ultrasonic Fatigue Testing, Very High Cycle Fatigue, β-Titanium Alloy

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