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Title Influence of electric discharge machining on fatigue limit of high strength aluminum alloy under finish machining.
Sub-Title
Subject Fatigue limit, electric discharge machining (EDM), surface characterization, aluminum alloy
Sub-Subject
Author Shahid Mehmood, Masood Shah, Riffat Asim Pasha, Sh
Publish Year 2017
Supervisor
Diss#. https://doi.org/10.1080/02533839.2017.1294993
Chapters
Pages 118-125
Text Language English
Accession
Library Section Research Article
Abstract The aim of this study was to investigate the fatigue limit of the electric discharge machined aluminum alloy 2024 T6. Machining was performed at 3, 6, 9, and 12 A discharge current values while all other parameters were kept constant. The fatigue tests were performed on a four-point rotating bending machine at the frequency of 50 Hz and at ambient temperature. Fatigue limits at 107 cycles were determined using staircase (up-and-down) method and the obtained data was analyzed statistically. For reference purposes, fatigue strength of the conventionally turned specimens was also found by the same technique. The EDM surface is characterized by its morphology, roughness, hardness, and thickness of the resolidified layer. The effects of discharge current values on these surface characterizing parameters and subsequent influence on fatigue limit have been discussed