Structure and Properties of the Bulk Standard Samples and Cellular Energy Absorbers

Abstract

The development of additive technology revealed a real prospect of their use for the manufacture of complex shapes. Now, it is possible to produce parts that previously were either very difficult to produce using the subtracting technology and joining technology, or it was not at all feasible. In the manufacture of parts of complex shape, it is necessary to use a supporting structure, which is necessary to place such a way that they can be easily removed. Additionally, they must necessarily be absent in certain places. In this regard, the preparation model can take significant time to satisfy all of these, often conflicting, requirements. In this paper, we show optimization examples of the model preparation with support structures for parts manufactured at the facility EOSINT M270 and used in medicine and engineering. Additional emphasis is on the fact that, during the manufacture of parts, solidification's modes of massive parts differ from those of the thin-walled portions of parts. The results of the complex studies on the different stainless steels (including martensitic) are described with an emphasis on their structure and mechanical properties. The results of a honeycomb energy absorbers, which are quite seldom produced by the additive technologies, are presented in this chapter.

Study of the Structure and the Destruction Surface of the Dampers Manufactured by the Selective Laser Melting

“…Taking into account the remarks on the mechanical stability of the plates, it can be assumed that the orientation and length of the melt volume, as well as the elastoplastic accommodation of their boundaries, are determining structural factors in the elastoplastic properties of the metal. Thus, thin walls with a thickness of up to 300 μm are preferably manufactured without hatching to minimize the formation of melting defects [12].…”

Optimal parameters for selective laser melting of various steel powders

“…The trajectory and scanning speed of the beam, as well as the mass of the powder applied in layers, controls the PC computer for a user-defined 3D-model. The relevance and promising of additive technologies are determined by the possibility of manufacturing a bulk product into one cycle from the idea and design before creating a finished sample [1][2][3][4]. In the practical implementation of technology, it is difficult to choose the melting parameters, since the parameters of the equipment used will greatly differ.…”

Structure and Properties of Additive Hard Magnetic Alloys 25Cr15Co and Alnico

“…The creation of magnets of complex geometric shapes according to the designed digital models is of practical and scientific interest. One of the promising methods for their manufacture is the additive method of selective laser melting (SLM) on a platform [1][2][3][4][5][6]. A feature of this process is the interaction of solid and liquid phases during short-term exposure to a laser beam.…”