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dc.contributor.authorKauffmann, Charles Josephen
dc.date.accessioned2016-02-01T14:45:17Zen
dc.date.available2016-02-01T14:45:17Zen
dc.date.issued1978en
dc.identifier.urihttp://hdl.handle.net/10919/64657en
dc.description.abstractFatigue tests in reversed torsion were run on 2024-T351 aluminum alloy specimens into which hydrogen had been diffused. The diffusion was accomplished by placing the specimens in a hydrogen environment (>99.5%) for 25 days at 2000 psi [13.8 MPa] and 123°C. A control group was tested which underwent the same temperature conditions for 25 days. The fatigue tests were run at low (20-25%) and high (85-90%) relative humidities and at shear stress levels of approximately 13400, 16800, and 20100 psi [89.6, 117, and 138 MPa]. The results of this investigation show that hydrogen charging has no effect on the torsional fatigue life of aluminum. However, a change in the crack propagation angle at high relative humidity for a ductile, circumferential crack on uncharged specimens to a brittle, 45° crack on hydrogen-charged specimens may be the result of hydrogen embrittlement.en
dc.format.extentvi, 64 leavesen
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 39900988en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1978.K383en
dc.titleThe effect of diffused hydrogen on the torsional fatigue life of 2024-T351 aluminum alloyen
dc.typeThesisen
dc.contributor.departmentMechanical Engineeringen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineMechanical Engineeringen
dc.type.dcmitypeTexten


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