scholarly journals Mechanical response of TiAl6V4 lattice structures manufactured by selective laser melting in quasistatic and dynamic compression tests

2015 ◽  
Vol 27 (S1) ◽  
pp. S17006 ◽  
Author(s):  
S. Merkt ◽  
C. Hinke ◽  
J. Bültmann ◽  
M. Brandt ◽  
Y. M. Xie
Keyword(s):  
Selective Laser Melting ◽  
Mechanical Response ◽  
Dynamic Compression ◽  
Lattice Structures ◽  
Compression Tests ◽  
Laser Melting

scholarly journals Microstructural and Mechanical Response of NiTi Lattice 3D Structure Produced by Selective Laser Melting

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 814 ◽  
Author(s):  
Carlo Alberto Biffi ◽  
Paola Bassani ◽  
Jacopo Fiocchi ◽  
Ausonio Tuissi
Keyword(s):  
Martensitic Transformation ◽  
Selective Laser Melting ◽  
Mechanical Response ◽  
Electron Backscatter Diffraction ◽  
Bulk Material ◽  
Niti Alloy ◽  
3D Structure ◽  
Lattice Structures ◽  
Laser Melting ◽  
Scanning Calorimetry

Nowadays, additive manufacturing (AM) permits to realize complex metallic structural parts, and the use of NiTi alloy, known as Nitinol, allows the integration of specific functions to the AM products. One of the most promising designs for AM is concerning the use of lattice structures that show lightweight, higher than bulk material deformability, improved damping properties, high exchange surface. Moreover, lattice structures can be realized with struts, having dimensions below 1 mm—this is very attractive for the realization of Nitinol components for biomedical devices. In this light, the present work regarded the experimental characterization of lattice structures, produced by selective laser melting (SLM), by using Ni-rich NiTi alloy. Differential scanning calorimetry (DSC), electron backscatter diffraction (EBSD), and compression testing were carried out for analyzing microstructure, martensitic transformation (MT) evolution, and superelasticity response of the SLMed lattice samples. The lattice microstructures were compared with those of the SLMed bulk material for highlighting differences. Localized martensite was detected in the nodes zones, where the rapid solidification tends to accumulate solidification stresses. An increase of martensitic transformation temperatures was also observed in lattice NiTi.

scholarly journals Investigations on the Mechanical Response of Gradient Lattice Structures Manufactured via SLM

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 213 ◽  
Author(s):  
Judyta Sienkiewicz ◽  
Paweł Płatek ◽  
Fengchun Jiang ◽  
Xiaojing Sun ◽  
Alexis Rusinek
Keyword(s):  
Relative Density ◽  
Energy Absorption ◽  
Dynamic Loading ◽  
Mechanical Response ◽  
Lattice Structure ◽  
Dynamic Compression ◽  
Absorption Capacity ◽  
Lattice Structures ◽  
Compression Tests ◽  
Static And Dynamic Loading

The main aim of the paper is to evaluate the mechanical behavior or lattice specimens subjected to quasi-static and dynamic compression tests. Both regular and three different variants of SS 316L lattice structures with gradually changed topologies (discrete, increase and decrease) have been successfully designed and additively manufactured with the use of the selective laser melting technique. The fabricated structures were subjected to geometrical quality control, microstructure analysis, phase characterization and compression tests under quasi-static and dynamic loading conditions. The mismatch between dimensions in the designed and produced lattices was noticed. It generally results from the adopted technique of the manufacturing process. The microstructure and phase composition were in good agreement with typical ones after the additive manufacturing of stainless steel. Moreover, the relationship between the structure relative density and its energy absorption capacity has been defined. The value of the maximum deformation energy depends on the adopted gradient topology and reaches the highest value for a gradually decreased topology, which also indicates the highest relative density. However, the highest rate of densification was observed for a gradually increasing topology. In addition, the results show that the gradient topology of the lattice structure affects the global deformation under the loading. Both, static and dynamic loading resulted in both barrel- and waisted-shaped deformation for lattices with an increasing and a decreasing gradient, respectively. Lattice specimens with a gradually changed topology indicate specific mechanical properties, which make them attractive in terms of energy absorption applications.

scholarly journals Damping behavior of 316L lattice structures produced by Selective Laser Melting

2018 ◽  
Vol 160 ◽  
pp. 1010-1018 ◽  
Author(s):  
Francesco Rosa ◽  
Stefano Manzoni ◽  
Riccardo Casati
Keyword(s):  
Selective Laser Melting ◽  
Lattice Structures ◽  
Laser Melting ◽  
Damping Behavior
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