Journal
METALS
Volume 10, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/met10111415
Keywords
vibration-based fatigue; ultra-high frequency; very high cycle fatigue; fatigue test; titanium alloy
Funding
- National Natural Science Foundation of China [91860112]
- National Key Research and Development Program of China [2017YFB0702004]
- Materials Special Project [JPPT-KF2008-6-1]
- Open Project from State Key Laboratory of Structural Analysis of Industrial Equipment of DLUT [GZ18116]
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This paper proposes an ultra-high frequency (UHF) fatigue test of a titanium alloy TA11 based on electrodynamic shaker in order to develop a feasible testing method in the VHCF regime. Firstly, a type of UHF fatigue specimen is designed to make its actual testing frequency reach as high as 1756 Hz. Then the influences of the loading frequency and loading types on the testing results are considered separately, and a series of comparative fatigue tests are hence conducted. The results show the testing data from the present UHF fatigue specimen agree well with those from the conventional vibration fatigue specimen with the loading frequency of 240 Hz. Furthermore, the present UHF testing data show good consistency with those from the axial-loading fatigue and rotating bending fatigue tests. But the obtained fatigue life from ultrasonic fatigue test with the loading frequency of 20 kHz is significantly higher than all other fatigue test results. Thus the proposed ultra-high frequency vibration-based fatigue test shows a balance of high efficiency and similarity with the conventional testing results.
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