polyGNN dataset: steel's micro/nano hardness prediction

The polyGNN dataset consists of a collection of grain-level load-depth curves corresponding to nano-indentation tests performed on a polycrystalline steel. The dataset is organized into relevant subfolders labeled as “${fmax} mN” with fmax = 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 7, 10 denoting the maximum indentation load used in each experimental set. Every subfolder contains 15 different load-depth files with the same fmax but at different indentation points which are labeled numerically from 1 to 15 as shown in Figure 1. These files include three columns representing the indentation time (s), depth (nm), and force (mN) measurements. To reconstruct the electron backscatter diffraction (EBSD) map, the file "stal_310_s_indenty_wszystkie.ang" can be loaded into the mtex software.