Fatigue Behaviour of Ti-6Al-4V Alloy in Vacuum and at Low Temperature |
| Journal |
Advanced Materials Research (Volumes 41 - 42) |
| Volume |
Structural Integrity and Failure |
| Edited by |
Xiaozhi Hu, Brent Fillery, Tarek Qasim and Kai Duan |
| Pages |
83-90 |
| DOI |
10.4028/www.scientific.net/AMR.41-42.83 |
| Online since |
April, 2008 |
| Authors |
J.H. Zuo,
Z.G. Wang,
En Hou Han
|
| Keywords |
Coupling Function, Fatigue Behaviour, Low Temperature, Ti6Al4V Alloy, Vacuum |
| Abstract |
Investigations have been conducted on the fatigue behavior of Ti-6Al-4V alloy with the
bimodal microstructure in air at room temperature, in vacuum at room temperature and in vacuum
at low temperature (100K), respectively. The results show that the fatigue life of this alloy is longer
in vacuum and/or at low temperature than that in air at room temperature. The combination of
vacuum and low temperature can much improve the fatigue properties of this alloy because of their
purifying effect on fatigue cracks propagation. SEM observation of fatigue fracture surface
indicates that all the fatigue cracks initiate in the sample surface when Nf ≦106 cycles. The above
three testing conditions lead to different modes of fatigue crack propagation and therefore much
different morphology of fatigue fracture. |
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