Defect and surface asperity dependent yield during contact loading of an organic molecular single crystal

摘要: The onset of plastic deformation was investigated using nanoindentation in single crystals the explosive cyclotrimethylene trinitramine (RDX). Cleavage and habit planes were tested revealing a range yielding behaviors. Smooth unprocessed exhibited distinct yield points near theoretical shear strength; produced by cleavage yielded at lower applied stresses. Cumulative probability distributions maximum stresses used to illustrate representative behavior for samples prepared different methods. A statistically significant difference observed planes. This suggested that structural defects, such as dislocations from growth sample preparation, being probed can be correlate mechanical response organic molecular with defect density. capability may help explain measurement differences fundamental properties this c...