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Effect of heat treatment on the mechanical properties of nylon parts in additive manufacturing

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Category: Content №2 2025

Last Updated on 26 April 2025

Published on 30 November -0001

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Authors:

L.Tumarchenko*, orcid.org/0000-0001-7973-7475, National University “Zaporizhzhia Polytechnic”, Zaporizhzhia, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Y.Vyshnepolskyi, orcid.org/0000-0002-8048-7976, National University “Zaporizhzhia Polytechnic”, Zaporizhzhia, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

D.Pavlenko, orcid.org/0000-0001-6376-2879, National University “Zaporizhzhia Polytechnic”, Zaporizhzhia, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2025, (2): 121 - 128

https://doi.org/10.33271/nvngu/2025-2/121

Abstract:

Purpose. To investigate the effect of heat treatment on the mechanical properties of polyamide 6 (nylon) parts manufactured by means of Fused Deposition Modelling (FDM) method.

Methodology. A 3D printer (Profi+ model) was used for samples printing. The G-code was generated using Slic3rPE software. Heat treatment was performed in a laboratory electric furnace STM-1-10. The effect of factors such as heat treatment temperature, duration of exposure and type of cooling was investigated. The mechanical properties were evaluated by measuring tensile strength and elongation at break using a UIT STM 100S testing machine. The results were statistically analysed using the STATISTICA software package, enabling the identification of the most significant factors and their interactions.

Findings. The influence of heat treatment parameters on the tensile strength and elongation at break of nylon parts was investigated. The most significant factor affecting tensile strength was the temperature of heat treatment, followed by the duration of exposure and the interaction between mentioned factors. Elongation at break was most influenced by the duration of exposure, as well as combination of heat treatment temperature and cooling type. The interaction of duration of exposure and cooling type also contributed to the response function (elongation at break). The maximum improvement in tensile strength (+61.74 %) was achieved at a temperature of 130 °C, duration of exposure of 90 minutes. To enhance the elongation at break, heat treatment is recommended under the following parameters: temperature -110 °C, duration ‒ 60 min, cooling ‒ in the furnace down to 20 °C.

Originality. It was established that the combination of heat treatment parameters significantly improved the strength and ductility of nylon parts produced by FDM. It was determined that the most effective parameters were the following: temperature ‒ 110‒130 °C, duration of exposure – 60‒90 min and gradual cooling in the furnace.

Practical value. The developed recommendations for heat treatment make it possible to improve the mechanical properties of nylon products manufactured by FDM technology. The results of the study open up new opportunities for the use of such parts in the military and dual-purpose products due to their improved strength and durability.

Keywords: Fused Deposition Modelling, nylon, heat treatment, tensile strength, elongation at break, statistical processing

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