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Deformation and fracture in micro-tensile tests of freestanding electrodeposited nickel thin films

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Publication Date
Volume
58
Issue
12
Identifiers
DOI: 10.1016/j.scriptamat.2008.01.049
Keywords
  • Nickel
  • Thin Films
  • Tension Test
  • Micromechanical Modeling
  • Liga
Disciplines
  • Physics

Abstract

In situ scanning electron microscopy micro-tensile tests were conducted on freestanding LIGA nickel thin films of two thicknesses (70 and 270 μm). The deformation and fracture mechanisms were elucidated by in situ scanning electron microscopy imaging and ex situ fractographic analysis. Due to the film microstructural gradient, an apparent thickness effect on the film yield strengths was observed, which was then rationalized with a continuum micromechanics model.

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