A modelling framework for fatigue-life prediction of selective laser melting additive manufactured Ti-6Al-4V

Psihoyos, Harry O.; Lampeas, George; Pantelakis, Spiros

doi:10.1016/j.prostr.2021.12.036

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Due to the fact that for metallic components produced by Direct Metal Laser Sintering (DMLS) technology, the possibilities of investigating the influence of technological factors are limited for the institutions that have acquired the production equipment (as they are given by the manufacturer), most authors focus on investigating the influence of factors related to design (such as volume fraction, porosity, pore size, cell type, and others). However, due to the affordability of plastic materials, as well as the availability of 3D printers for plastic materials, studies aimed at investigating the mechanical properties of structures made of plastic have been carried out to date far more than those in which metal was used for the production of structures [ 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Crosshead Speed and Volume Ratio on Compressive Mechanical Properties of Mono- and Double-Gyroid Structures Made of Inconel 718

et al. 2023

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The current development of additive technologies brings not only new possibilities but also new challenges. One of them is the use of regular cellular materials in various components and constructions so that they fully utilize the potential of porous structures and their advantages related to weight reduction and material-saving while maintaining the required safety and operational reliability of devices containing such components. It is therefore very important to know the properties of such materials and their behavior under different types of loads. The article deals with the investigation of the mechanical properties of porous structures made by the Direct Metal Laser Sintering (DMLS) of Inconel 718. Two types of basic cell topology, mono-structure Gyroid (G) and double-structure Gyroid + Gyroid (GG), with material volume ratios of 10, 15 and 20 %, were studied within our research to compare their properties under quasi-static compressive loading. The testing procedure was performed at ambient temperature with a servo-hydraulic testing machine at three different crosshead testing speeds. The recorded data were processed, while the stress–strain curves were plotted, and Young’s modulus, the yield strength Re0.2, and the stress at the first peak of the local maximum σLocMax were identified. The results showed the best behavior under compression load among the studied structures displayed by mono-structure Gyroid at 10 %. At the same time, it can be concluded that the wall thickness of the structure plays an important role in the compressive properties but on the other hand, crosshead speed doesn´t influence results significantly.

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