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Analysis of Creep Behavior and Parametric Models for 2124 Al and 2124+SiC Composite
No full textThe creep behavior of unreinforced 2124 aluminum and 2124 aluminum reinforced with 15 w/o silicon carbide whiskers was studied at temperatures from 250 F to 500 F. Tensile tests were conducted to determine the basic mechanical properties, and microstructural and chemical anyalyses were performed to characterize the starting materials. The creep, tensile, and microstructural data for the 2124+SiC composite were compared with a similarly processed unreinforced 2124 aluminum alloy. Applying the basic theories for power law creep developed for common metals and alloys, the creep stress exponents and activation energies for creep were determined from the experimental data. The results were used to identify creep deformation mechanisms and compared to predicted values based on a parametric approach for creep analysis. The results demonstrate the applicability of traditional creep analysis on non-traditional materials.Master of Scienc
TEM characterisation of near surface deformation resulting from lubricated sliding wear of aluminium alloy and composites
Get PDFAluminium alloy composites have been extensively investigated for use in tribo-contact applications, however little detailed literature exists on the sub-surface microstructural evolution as a result of lubricated sliding wear. In this study two un-reinforced alloys (2124 and 5056) and identical alloy composites, reinforced with 15 vol.% MoSi2 intermetallic particles were produced by a powder metallurgy route and subject to lubricated sliding at initial Hertzian contact pressures of 0.9–1.2 GPa. Focused ion beam (FIB) techniques were used to produce thin sections parallel to the worn surface. Sub-surfaces layers were then examined in detail by transmission electron microscopy (TEM). Results indicated that the depth of deformation was minimal in the alloys, with the most highly deformed polycrystalline layer confined to approximately 1 ?m below the worn surface. Equiaxed sub-grain sizes of around 0.1 ?m were comparable to that observed for dry sliding of similar alloys and composites [1]. Evidence of surface erosion by solid particle impact was also observed, with wear debris generated as a result of material exceeding the ductility limit. For the composites, the MoSi2 provided a suitable means of transferring the normal contact load from asperity contacts to areas in the bulk of the sample. Reinforcement fracture was observed both at the worn surface and in areas further away in the bulk, for particles which were in direct contact with each other. Evidence of the deformation of the aluminium matrix below reinforcements was also present, with average sub-grain sizes of around 330 nm. Thus, such intermetallic reinforcements may have potential to replace reinforcements that are more abrasive to counterfaces, such as SiC or Al2O3, whilst still providing adequate wear resistance for the aluminium alloy.<br/
Students and Faculty at signing
No full textIn the 1960's, students and faculty attend a document signing.[Back] Student Life Pre 1970; Photograph By Ansel J. Krutsinger, 2124 College Way, Forest Grove, OR.
Mandurama photograph collection [2124] [picture] /
No full textAlso available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-an8526486-2124
Drummond, Sir Peter R N, 2124
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/382708Surname: DRUMMOND. Given Name(s) or Initials: SIR PETER R N. Military Service Number or Last Known Location: 2124. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 57670.222354
Item: [2016.0049.15001] "Drummond, Sir Peter R N, 2124
Beulverhalten von Kugelschalen unter stetig veraenderlichen Flaechenlasten Schlussbericht
No full textTIB: RN 5905(2124) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman
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