Microscopic shear bands at Luders fronts in mild steel

Tips and Tricks for Characterizing Shape Memory Alloy Wire: Part 3-Localization and Propagation Phenomena

“…This nucleation peak is similar to the upper yield point/lower yield point instability observed at the onset of Lüders band formation in mild steels 5, 6, 7 and is akin to certain structural problems with propagating buckles 8, 9 . The size of this load drop is strongly dependent on the quality of the experimental setup, boundary conditions, and geometry of the specimen, so any imperfections will cause an “early” (the so‐called heterogeneous) nucleation, masking the true response.…”

Tips and Tricks for Characterizing Shape Memory Alloy Wire: Part 2-Fundamental Isothermal Responses

“…Such localization and propagation phenomena, while uncommon in materials testing, certainly do exist in other materials but for different microscopic reasons. Examples include mild steel that exhibits Lüders bands during uniaxial testing 11–13 and high‐density polyethylene 14,15 that exhibits large strain propagating necks during tensile cold drawing. Figure 12 shows a schematic of the common underlying cause of these phenomena.…”

Predicting of the Lüders’ bands in the processing of TH material in computer environment by means of stochastic modeling

“…have been shown to influence the occurrence and propagation of LB (Low and Gensamer, 1944;Cottrell, 1948;Gilman, 1959;Ananthan and Hall, 1987;Wen and Morris, 2004). Many studies have dealt with the macrostructural parameters and testing variables (thermal variables, strain rate, investigation devices, specimen geometry, etc.)…”