Figure 2: Mechanical annealing during the in situ nanocompression test of a typical Mo nanopillar.

Bright-field TEM images of the diameter D=142 nm pillar before (a) and after (e) the in situ compression test. (b), (c), (d) and (e) correspond to the marked points in the engineering stress versus strain curve in (f). The scale bar in each figure represents 100 nm. See also the recorded video in Supplementary Movie 1.