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Effect of electric discharge machining on the fatigue life of Inconel 718The effect of electric discharge machining on the fatigue life of Inconel 718 alloy at room temperature was investigated. Data were generated in the uniaxial tension fatigue mode at ambient temperature using flat 3.175 mm thick specimens. The specimens were machined on a wire-cut electric discharge machine at cutting speeds ranging from 0.5 to 2 mm per minute. The specimens were fatigued at a selected stress, and the resulting fatigue lives compared with that of the virgin material. The surfaces of the fatigued specimens were examined under optical and scanning electron microscopes, and the roughness of the surfaces was measured using a standard profilometer. From the results of the investigation, it was concluded that the fatigue life of the specimens machined using EDM decreased slightly as compared with that of the virgin material, but remained unchanged as the cutting speed was changed. The results are explained using data produced employing microhardness measurements, profilometry, and optical and scanning microscopy.
Document ID
19880050897
Document Type
Reprint (Version printed in journal)
Authors
Jeelani, S.
(Tuskegee Inst. AL, United States)
Collins, M. R.
(Tuskegee University AL, United States)
Date Acquired
August 13, 2013
Publication Date
April 1, 1988
Publication Information
Publication: International Journal of Fatique
Volume: 10
ISSN: 0142-1123
Subject Category
Mechanical Engineering
Funding Number(s)
CONTRACT_GRANT: NGT-01-005-751
Distribution Limits
Public
Copyright
Other
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