Aspects of Technical Requirements for the Future Autonomy of Military Vehicles

Turo, Tomas; Neumann, Vlastimil; Krobot, Zdeněk

doi:10.1007/978-3-319-76072-8_26

Cited by 5 publications

(2 citation statements)

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“…The use of additive technologies is currently on the rise in most industrial areas. The field of defense industry is not exception in this view, and it is in its environment or in the environment of military technologies (1,2) that additive technologies find their significant application. This problems are presented, for example, by the authors Kim, Ahn (3) within the NATO armies, or Yang, et al (4).…”

Section: Introductionmentioning

confidence: 99%

Resistance of PLA Material Prepared By Additive Technology

Studeny¹,

Dobrocký²,

Dobšáková³

et al. 2021

ECS Trans.

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The article studies the surface properties of PLA material prepared by additive technology, i.e. 3D printing. Samples with a square test area were printed by FFF technology. After 3D printing, the surface texture of the samples was evaluated in terms of microgeometry.Tribological tests were performed on the samples. The surface of the samples was cyclically stressed with the same load, always on the same path. Cyclic loading of the surface was performed on a UMT Bruker tribometer. The tribological properties between the sample surface and the test specimen in the shape of a ball were studied during the reciprocating motion. In particular, the coefficient of friction was measured and evaluated. The ball material was PTFE and Polypropylene.The wear parameters of samples and balls were documented and evaluated. The results of the tests are the load dependencies on the wear of the PLA material and the test specimens.

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Section: Introductionmentioning

confidence: 99%

Resistance of PLA Material Prepared By Additive Technology

Studeny¹,

Dobrocký²,

Dobšáková³

et al. 2021

ECS Trans.

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“…The contemporary trend in the automotive and weapon industry of constantly improving the performance of special parts of weapons and engines, while decreasing the weight and dimension of weapon and engines' parts at the same time, has the effect of higher requirements for quality [1]. The mechanical parts of systems are innovating due to needs in the "army" area, especially in the sphere of the current trend of development of autonomous systems [2]. In these days, the industry of material technology has reached some limits of improvement in material properties.…”

Section: Introductionmentioning

confidence: 99%

Service Behavior of Nitride Layers of Steels for Military Applications

2020

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Steels which are utilized in the manufacturing of specific parts of military technology such as crankshafts of engines in heavy-duty vehicles or barrels of guns must be subsequently modified by heat treatment according to the requirements of customers. Despite the hard surface of martensitic structure obtained by hardening process, steels have a low wear resistance and high values of coefficient of friction. To improve these parameters and due to the fact that many of steels which are utilized for manufacturing of mentioned parts are also categorized as Nitralloy steels, in this paper, the improvement in these properties of chosen steels by the application of plasma nitriding has been studied. The steel equivalent 17Ni4CrMo (i.e., CSN 41 6720) and equivalent 42CrMo4 (i.e., CSN 41 5142) were chosen for the study. The chemical composition of chosen steels was verified by optical emission spectrometry. The microstructure and the diffusion layer were observed by optical microscopy due to the evaluation of layer parameters important for the lifetime. ZWICK ZHU 2.5 was used for a measurement of the universal hardness of the surface and values of graphs of microhardness were obtained by the device LM 247AT LECO from a cross-section of samples. The coefficient of friction was determined by Bruker CERT-UMT-3 with a ball-on-disc method. The parameters of wear paths were obtained by Talysurf CLI 1000. After the application of plasma nitriding technology, the hardness of both steels was rapidly increased in comparison with non-nitrided samples. According to the comparison of coefficients of friction with respect to the parameters of the measurement, the coefficient of friction of nitrided samples decreases with increasing temperature, which is essential knowledge for the weapon industry, especially the construction of bore barrel.

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