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Investigating electrical properties of ADAM 3D printed 17-4PH stainless steel for integrated sensing functionalities

Barkman, A.H. (2022) Investigating electrical properties of ADAM 3D printed 17-4PH stainless steel for integrated sensing functionalities.

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Abstract:This study investigates integrated sensing functionalities for 3D metal printed structures using theMarkforgedMetal X system. Thematerial that is printed is a polymer bonded 17-4PHstainless steel powder. A second, ceramic, material is used to separate metal parts. The printed part is washed and then sintered. The mechanical anisotropic properties of the sintered parts are found in literature. The first of three experiments looks deeper in the printing processes. The second one further investigates electrical resistivity. Finally the electrical anisotropic effects are inspected. The washed ‘brown part’ is non conductivewhereas the sintered part is conductive. The electrical resistivity varies, but is around the theoretical value of 98 μΩcm with a deviation of around -5% and + 6% . Using this with the minimum printing parameters a theoretical resistor can be printedwith a resistance of 122Ω. However, stainless steel can leak through the ceramic release material and therefore electrically connecting the traxels. This gives limitations in dimensional design and the resistance that can be created. Solutions to prevent this shorting of the traxels failed during the sintering stage. Moreover, it proved difficult to accurately measure small resistances due to a varying contact resistance in the setups used. Anisotropic effects are found, but are probably not due to the structure. The resistance difference in case of anisotropy are likely too small to be of practical relevance.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:50 technical science in general, 51 materials science, 53 electrotechnology
Programme:Electrical Engineering BSc (56953)
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