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Title: Investigation of Shot-Peening and Re-Peening Effects on Partially Fatigued Notched Components
Author: Dr. S. Kyriacou, Dr. J. Al-Khaja
Source: Conf Proc: ICSP-6, (p.233-242)
Publication year 1996
Document number: 1996070
Number of pages: 10
Abstract:
This investigation systematically approached the effect of peening and re-peening upon the fatigue life of partially fatigued notched components made of high stength 7075
AI-Zn alloy, loaded under axial tension-tension conditions. It has bee found that peening partially fatigued specimens not previously shot peen treated can be beneficial as
the total fatigue life of failure extends by as much a 115% under certain conditions, as compared to the shot peened life. However, re-peening was found to provide little
benefits and in some cases it had a detrimental effect. X-ray diffraction measurements have shown that peening after partial fatigue and re-peening induced residual
stresses were not as intense as those induced on 'virgin' material.
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