There are several characteristics of silver agglomerates that are not incorporated in existing models for agglomerate dynamics. These characteristics include particle alignment in the electric field, necking between particles, polydispersity of the primary particles, and variable primary sphere size. Estimates of these features on the agglomerate dynamics were computed as perturbations to the C...

Abstract The forming limit diagram (FLD) of high-purity niobium sheets used for the manufacturing superconducting radiofrequency (SRF) cavities is presented. Marciniak (in-plane) test was with blanks a thickness 1 mm and blank carriers annealed oxygen-free electronic (OFE) copper. A high formability measured, an approximate true major strain at necking plane 0.44. likely caused by its rate sens...

To enable an accurate simulation of manufacturing processes, it is essential to characterise and model the mechanical behaviour sheet metals up large deformations. However, after onset necking, deformation becomes highly heterogeneous stress triaxial. By combining full-field measurements inverse methods, possible calibrate beyond necking. A possibility use virtual fields method, by extending it...

The experimental detection of localized necking is an important issue in sheet metal forming. Today, the most common and extended techniques are strain-based methods using digital image correlation (DIC). present work discuses a thermal methodology to detect onset metals based on analysis temperature gradient infrared thermography (DIT). A series tensile tests H240LA-O3 high-strength steel 1.2m...

The focus of this study is on the characterization local plastic deformation and failure functionally graded 22MnB5 plates after hot stamping using an in situ approach. Various forming strategies at elevated temperatures are performed differentially tempered tools to locally tailor microstructure. By controlling cooling rate, as well martensitic ferritic–pearlitic microstructures obtained. Expe...