Mehran Bahramyan is a PhD researcher in I-Form working on the modeling of additive manufacturing processes. He obtained his undergraduate degree in Electrical Engineering and then went on to complete an MSc in Materials Science and Engineering on X-ray diffraction peak profile analysis of nanostructured nickel powder. Before starting his PhD, Mehran was involved in some international projects for molecular dynamics simulation of metals and high entropy alloys to study solidified microstructures and obtain deformation mechanisms. Mehran started his PhD with I-Form in summer 2019 and is investigating SLM processing for the production of bespoke microstructures and resultant part properties using multi-scale modeling.
Research Interests (Lay Summary)
Mehran’s main research interests are in the area of multi-scale modeling in order to get a deep insight into the structure-property relationships of metals and alloys, and then validation of the results by experimental studies to understand the effects of SLM parameters on the final microstructure. In SLM, different process parameters (such as laser power, laser spot size, laser scan speed, etc) influence the microstructure and properties of the final product.
Due to the nature of layer-by-layer fabrication of SLM processes, computational approaches should include microscale and macroscale models. The main aim of microscale process modeling is investigating the fundamental mechanisms of the SLM process at small length and time scales such as temperature evolution and transient melt pool dynamics. Macroscale modeling inherits the microscale modeling results to predict surface integrity of build parts such as part distortion and residual stresses. The aim of this work is the integration of multiscale modeling approaches at the process level. This can provide essential information to further predict the resultant microstructure and allow optimizing of the process design for improved part quality.