Effect of hydrogen charging on the mechanical properties of medium strength aluminium alloys 2091 and 2014

A. Bandopadhyay, Rajan Ambat, E.S. Dwarakadasa

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Cathodic hydrogen charging in 3.5% NaCl solution altered the mechanical properties of 2091-T351 (Al-Cu-Li-Mg-Zr) determined by a slow (10(-3)/s) strain rate tensile testing technique. UTS and YS decreased in the caw of 2091-T351 and 2014-T6(Al-Cu-Mn-Si-Mg) with increase in charging current density. Elongation showed a decrease with increase in charging current density for both the alloys. However, elongation occurring throughout the gauge length in uncharged specimens changed over to localized deformation, thus increasing the reduction in area in charged specimens. A transition in fracture mode from surface (brittle) to the core (ductile) was observed. The presence of hydrogen increased the hardness, mostly indicative of solution strengthening and it decreased with depth confirming the existence of hydrogen concentration gradient. The effects were similar in 2014-T6, but to a slightly smaller extent.
    Original languageEnglish
    JournalBulletin of Materials Science
    Volume15
    Issue number4
    Pages (from-to)311-319
    ISSN0250-4707
    DOIs
    Publication statusPublished - 1992

    Fingerprint Dive into the research topics of 'Effect of hydrogen charging on the mechanical properties of medium strength aluminium alloys 2091 and 2014'. Together they form a unique fingerprint.

    Cite this