Electron Beam Melting of Advanced Materials and Structures, mass customization, mass personalization

direct metal fabrication;rapid prototyping;electron beam melting;lattice materials;tunable materials;lunar regolith;mesh structures;layered manufacturing

Mahale, Tushar Ramkrishna ; Denis Cormier, Committee Co-Chair,Harvey West, Committee Member,Edward Grant, Committee Member,Ola Harrysson, Committee Chair,Mahale, Tushar Ramkrishna ; Denis Cormier ; Committee Co-Chair ; Harvey West ; Committee Member ; Edward Grant ; Committee Member ; Ola Harrysson ; Committee Chair

University:North Carolina State University

关键词: direct metal fabrication;    rapid prototyping;    electron beam melting;    lattice materials;    tunable materials;    lunar regolith;    mesh structures;    layered manufacturing;   

Others  :  https://repository.lib.ncsu.edu/bitstream/handle/1840.16/4943/etd.pdf?sequence=1&isAllowed=y

美国|英语

来源: null

【 摘 要 】

Layered manufacturing has for long been used for the fabrication of non-functional parts using polymer-based processes. Developments in laser beam and electron beam welding technologies and their adoption to layered manufacturing has made it possible to fabricate high-density functional parts in metal irrespective of the level of complexity. The Electron Beam Melting (EBM) process by Arcam AB is one such layered manufacturing process that utilizes a focused electron beam to process metal powder, layer by layer, in a vacuum environment. Research conducted as part of this body of work, looks into the development of both bulk materials in the form of metal alloys and ceramic metal-matrix composites as well as the development of tunable mechanical & thermal metamaterials. Simulation models to approximate electron beam melting were suggested using commercial finite element analysis packages. A framework was developed based on the finite difference method to simulate layered manufacturing using Arcam AB’s electron beam melting process. The outputs from the simulation data could be used for the better understanding the local melting, grain evolution, composition and internal stresses within a freeform-fabricated metal parts.