0000000000220391
AUTHOR
Roberto Riccobono
Material flow behaviour in the Friction Stir Spot Welding of aluminum alloys
Friction stir spot welding (FSSW) is a technological process that it allows to obtain junctions characterized by good mechanical properties and to perform them in a simple and fast way. The detailed knowledge of material flow around rotating tool, and of the microstructural evolution occurring during this process, constitute the fundamental input to realize analysis and simulation models in order to determine a optimal tool design and high structural efficiency welds. In the present research, an integrated mechanical-metallurgical-morphological analysis has been performer, to evaluate the influence of the different technological parameters on the characteristics of the joint. The experiment…
ANN Model to predict the bake hardenability of Transformation-Induced Plasticity steels
Neural networks are useful tools for optimizing material properties, considering the material’s microstructure and therefore the thermal treatments it has undergone. In this research an artificial neural network (ANN) with a Bayesian framework able to predict the bake hardening and the mechanical properties of the Transformation-Induced-Plasticity (TRIP) steels was designed. The forecast ability of the ANN model is achieved taking into account the operating parameters involved in the Intercritical Annealing (IA), in the Isothermal Bainite Treatment (IBT) and also considering the different prestrain values and the volume fraction of the retained austenite before the Bake Hardening (BH) treat…
Improving Of The Productivity And The Quality Of A Manufacturing Robotized Cell For Mig/Mag Welding
During the last years, globalization and the necessity to reduce production costs have pushed industry to employ more and more manufacturing robotized cells. This trend has been assimilated by arc welding too. The use of robotic systems allows to increase the performance of productive systems by means of reduction in lead-time, reproducibility of processes and increase in quality. However, process automation needs pre-scheduling of manufacturing cell movements and also a setup of different welding parameters, such as power provided by the welding generator, arc length and robot speed, all of which allows to get a joint without defects. An online scheduling of robotic systems brings certainl…