Abstract
We present field-ion microscopy observation and crystallographic analysis which shows that plastic deformation mode in the tungsten nanotip in the field of high mechanical stresses occur by combining formations of strain localization bands and crystal lattice reorientations. Nanomechanical tensile tests in situ at about 15 GPa have revealed the large-angle reorientations of grains corresponding to the coincident site lattice with Σ = 33, which can be regarded as a result of reactions between lattice dislocations.
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