Fretting cracking behaviour on pre-stressed aluminium alloy specimens |
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| Authors: | PReybet Degat ZR Zhou L Vincent |
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| Affiliation: | aDépt. Matériaux-Mécanique Physique, UMR 5621, IFOS, Ecole Centrale de Lyon, 69131 Ecully Cédex, France;bTribology Laboratory, South-West Jiaotong University, 610031 Chengdu, P.R. China |
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| Abstract: | A new testing rig has been developed which enables fretting tests on pre-stressed specimens to be carried out. Three aluminium alloys, Al-Li 2091, Al-Cu 2024 and Al-Zn 7075, were used in the tests. The imposed amplitude D ranged from ± 10 to ± 75 μm and normal load Fn from 500 to 1000 N. The static external stress σS was set as σD/10, σD/2 and σD (σD is the fatigue limit). The tests were carried out with a frequency of 1 or 5 Hz up to 106 cycles. In this paper, analysis of fretting behaviour has been carried out using the fretting map concept. The effect of the axial load (pre-stress) on fretting cracking is emphasized. |
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| Keywords: | Author Keywords: fretting external static stress cracking aluminium alloys |
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