Effect of tool profile and fatigue loading on the local hardness around scratches in clad and unclad aluminium alloy 2024

Kashif Khan, Michael Fitzpatrick, Sarah Hainsworth, L. Edwards

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Nanoindentation has been used to study the hardness changes produced by scratching of aluminium alloy AA2024, with and without a clad layer of pure aluminium. The hardness was mapped around scratches made with diamond tools of different profiles. One tool produced significant plastic damage with associated hardening at the scratch root, whilst the other produced a ‘cleaner’cut with no hardening. The different behaviours are attributed to whether the tool makes the scratch by a ‘cutting’or a ‘ploughing’mechanism. The degree of plastic damage around the scratches has been correlated with peak broadening data obtained using synchrotron X-ray diffraction. There was no change observed in the local hardness around the scratch with fatigue loading.
Original languageEnglish
Pages (from-to)297-304
Number of pages8
JournalMaterials Science and Engineering: A
Volume527
Issue number1-2
DOIs
Publication statusPublished - 2009

Keywords

  • Nanoindentation
  • Synchrotron X-ray diffraction
  • Hardening
  • Scratches

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