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Observation and Numerical Simulation of Melt Pool Dynamic and Beam Powder Interaction During Selective Electron Beam Melting
Selective electron beam melting (SEBM) is an additive manufacturing method used to
produce complex parts in a layer-by-layer process utilizing Ti6Al4V powder. To improve the
very good properties of built parts even more and to use the full capacity of the process, the
fundamental understanding of the beam powder interaction is of essential relevance.
Numerical simulations and observation with a high speed camera of powder melting show the
strong melt pool dynamic and its lateral extent clearly. Furthermore, the immediate effect of
beam parameters, e.g. beam current and velocity, on the melting behavior of the powder can
be resolved in time steps of a few milliseconds.Mechanical Engineerin
Processing window and evaporation phenomena for Ti–6Al–4V produced by selective electron beam melting
Simulation of metallic powder bed additive manufacturing processes with the finite element method: A critical review
Forming characteristics of thin-walled samples by metal fused-coating additive manufacturing
Effects of different cooling channels on the cooling efficiency in the wax injection molding process
Additive manufacturing of titanium alloys for biomedical applications
Titanium alloys have been extensively used in medical field, especially for load-bearing implants due to their excellent properties such as high strength and great corrosion resistance. In addition to the well-known CP-Ti and Ti-6Al-4V alloy, many beta type titanium alloys comprising of non-toxic and non-allergic elements have being developed for the next generation of bone implant materials. However, the hard machinery and high cost of materials removal arising from the conventional manufacturing processes are the two main obstacles of various potential applications of titanium alloys. As emerging advanced manufacturing technologies, additive manufacturing techniques are providing the ideal platform for the creation of these customized devices, where three dimensional complex parts could be realized by sequential production of two dimensional layers. Thus, additive manufacturing facilitates the manufacturing of parts with almost no geometric constraints and is economically feasible down to a batch size of one. This chapter mainly review the recent progress of the additive manufacturing (via selective laser melting and electron beam melting) of titanium alloys and their products, including the processing optimization, microstructure, mechanical properties and fatigue properties for different types of titanium alloys (CP-Ti, Ti-6Al-4V and Ti-24Nb-4Zr-8Sn) and their porous structures