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Focused ion beam (FIB) milling is the typical method used to fabricate micropillars to study small-scale plasticity and size effects in uniaxial compression. However, FIB milling can introduce defects into the milled pillars. To investigate the effects of FIB damage on mechanical behavior, we tested Mo-alloy micropillars that were FIB milled following directional solidification, and compared their...
Single-crystal micro-pillars of a molybdenum alloy were prepared by a new technique that involves chemically etching away the matrix of a directionally solidified NiAl–Mo eutectic. The square cross-section pillars had edge dimensions ranging from ∼360 to ∼1000nm. When tested in compression with a nanoindentation system, the pillars all yielded, regardless of size, at a critical resolved shear stress...
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