Microcantilever bend testing and finite element simulations of HIP-ed interface-free bulk Al and Al-Al HIP bonded interfaces

Nathan A. Mara, Justin Crapps, Thomas A. Wynn, Kester D. Clarke, Antonia Antoniou, Patricia O. Dickerson, David E. Dombrowski, Bogdan Mihaila

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We report on the strength of Al-Al interfaces and the effects of chemical segregation and interfacial void formation on bond strength using microcantilever bend testing. Interfaces are synthesised via hot isostatic pressing. Microcantilevers of several nominal dimensions were fabricated via focused ion beam and deformed in a nanoindenter. We find increased cantilever strength as a function of decreasing sample size, with a linear dependence of the yield strength on the inverse square root of the length scale characteristic to the cantilever cross-section. The presence of pores and chemical segregation decreases the yield strength of the material by 17% and the accommodated strain energy by 10-15% for strain values in the 6-12% range.

Original languageEnglish (US)
Pages (from-to)2749-2758
Number of pages10
JournalPhilosophical Magazine
Volume93
Issue number21
DOIs
StatePublished - Jul 1 2013
Externally publishedYes

Keywords

  • aluminum alloys
  • bending test
  • finite element analysis
  • hot isostatic pressing (HIP)
  • nanoindentation

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