Very high cycle fatigue behavior of Ti-6Al-4V alloy

DOI

10.2991/icmea-17.2018.30How to use a DOI?

Keywords

Ti-6Al-4V; Very high cycle fatigue; Crack initiation

Abstract

In order to investigate the fatigue behavior of Titanium Alloy in very high cycle region, fatigue test of Ti-6Al-4V was performed at ambient temperature by using ultrasonic fatigue equipment. Fracture surface morphology was observed by using Scanning Electron Microscope. The results demonstrate that the S-N curve exhibited a continuously descending trend and the fatigue limit was not observed. The fatigue failure still occurred when the loading cycles exceeded 108 cycles. Brittle failure and plastic failure were both observed under ultrasonic loading. Fatigue cracks in high cycles fatigue prefer to initiate from surface and in very high cycle fatigue the crack trend to initiate from subsurface.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Nu Yan
AU  - Xin Zhu
AU  - Donggui Han
AU  - Fang Liu
AU  - Yonghua Yu
PY  - 2018/02
DA  - 2018/02
TI  - Very high cycle fatigue behavior of Ti-6Al-4V alloy
BT  - Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)
PB  - Atlantis Press
SP  - 129
EP  - 132
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmea-17.2018.30
DO  - 10.2991/icmea-17.2018.30
ID  - Yan2018/02
ER  -