Journal
EXPERIMENTAL MECHANICS
Volume 57, Issue 3, Pages 495-500Publisher
SPRINGER
DOI: 10.1007/s11340-016-0199-1
Keywords
Fatigue; Nanowire; In situ tensile testing; Cyclic deformation; Micro-mechanical device; Nanomechanics
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Funding
- Research Grants Council of the Hong Kong Special Administrative Region, China [CityU 138813]
- National Natural Science Foundation of China (NSFC) [51301147]
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Despite extensive research on the mechanical properties of one-dimensional (1-D) nanomaterials such as nanowires and nanotubes in the past two decades, experimental data on the fatigue behavior of 1-D building blocks are still very limited. Here, we demonstrate the first quantitative in situ tensile fatigue testing of individual nanowires inside a high-resolution scanning electron microscope (SEM), based on the nanoindenter-assisted push-to-pull dynamic tensile straining mechanism. With the robust micro-mechanical devices and independent quantitative nanoindenter for actuation and force sensing, we achieved both stress- and strain-controlled cyclic tensile loading on nanowire samples with variable loading frequencies up to 10 Hz, and demonstrated the low-cycle fatigue behavior of pristine single crystalline nickel (Ni) nanowires.
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