Micromechanical insights into unconstrained grain boundary sliding

This dataset contains SEM images and in situ SEM micropillar compression results for 105 pillars of Ni bicrystal with a high-angle grain boundary and 49 pillars of Ni [344] single crystal. The diameters of the micropillars are 1 µm and 3 µm, and the tests were conducted from RT to 600 °C with strain rates varying from 10-1 to 5×10-4 s-1. The data is grouped into two sets: Determination of Q and SRS. The 'Q' group is divided into single-crystal and bicrystal, which are further categorized by the test temperature. In this group, all tests are carried out at a constant strain rate of 10-3 s-1.The 'SRS' group is divided into RT and 300 °C, and each is further divided by the strain rates employed for the test. At the final level of each category, SEM images of pillars before and after deformation, highlighting the dimensions of fabricated micropillars and slip activities, respectively, as well as the engineering strain and engineering stress from the in situ tests of pillars, are included in CSV format.