328
D. I. Stoia et al.
The SN ratio was graphically presented in Fig. 2, showing the influence of each
control factors taken at every level on the mechanical strength of PA2200 samples.
The values used for representation are averages.
4 Conclusions
The paper presents an optimization work conducted using Taguchi’s design. It starts
with modeling the standard sample, continuing with the additive manufacturing
process according to the experiment table, and finally conducting the tensile testing.
The main role in tensile strength of PA2200 obtained by SLS is played by the
energy density of the laser beam followed by the orientation angle and the chamber
temperature.
The optimum level obtained for each control factors was achieved: E = 0, θ = 1
and T = 2. Using this parameter setup, optimal (from the perspective of mechanical
strength) polyamide parts can be obtained by SLS. The greatest influence of the three
factors considered in the study belongs to the energy density. It plays an essential
role both in mechanical strength and stiffness of the SLS manufactured parts.
Acknowledgements This work was supported (in part) by research grant GNaC2018-ARUT,
no.1363/01.02.2019, financed by Politehnica University of Timisoara.
References
1. C.K. Chua, C.H. Wong, W.Y. Yeong, Standards, Quality Control, and Measurement Sciences
in 3D Printing and Additive Manufacturing (Elsevier Inc., 2017)
2. D.I. Stoia, E. Linul, L. Marsavina, Influence of manufacturing parameters on mechanical
properties of porous materials by selective laser sintering. Materials 12, 871 (2019)
3. A. Rajic, E. Desnica, S. Stojadinovic, D. Nedelcu, Numerical simulation and additive manufacturing technology in design of knee implant patterns. J. Optoelectron. Adv. Mater. 16(9–10),
1180–1190 (2014)
4. A. Marin, K. Menyhardt, A.M. Marin, R. Nagy, M. Poenaru, Prototype device for mastoid obliteration in pediatric cholesteatoma patients, in AVMS 2017, Springer Proceedings in Physics,
vol. 198 (Springer, 2018)
5. C. Cosma, N. Balc, M. Moldovan, L. Morovic, P. Gogola, C. Miron-Borzan, Post-processing
of customized implants made by laser beam melting from pure Titanium. J. Optoelectron. Adv.
Mater. 19(11–12), 738–747 (2017)
6. D. Vermesan, I. Trocan, R. Prejbeanu, D.V. Poenaru, H. Haragus, D. Gratian, M. Marrelli, F.
Inchingolo, M. Caprio, R. Cagiano, M. Tatullo, Reduced operating time but not blood loss with
cruciate retaining total knee arthroplasty. J Clin Med Res. 7(3), 171–5 (2015)
7. R. Nagy, R.S. Maruta, K. Menyhardt, Active vibration control of test equipment through feedback algorithm, in AVMS-2017, Springer Proceedings in Physics, vol. 198 (Springer, Berlin,
2018)
8. K. Zhang, G. Fu, P. Zhang, Z. Ma, Z. Mao, D.Z. Zhang, Study on the geometric design of
supports for overhanging structures fabricated by selective laser melting. Materials 12, 27
(2019)
D. I. Stoia et al.
The SN ratio was graphically presented in Fig. 2, showing the influence of each
control factors taken at every level on the mechanical strength of PA2200 samples.
The values used for representation are averages.
4 Conclusions
The paper presents an optimization work conducted using Taguchi’s design. It starts
with modeling the standard sample, continuing with the additive manufacturing
process according to the experiment table, and finally conducting the tensile testing.
The main role in tensile strength of PA2200 obtained by SLS is played by the
energy density of the laser beam followed by the orientation angle and the chamber
temperature.
The optimum level obtained for each control factors was achieved: E = 0, θ = 1
and T = 2. Using this parameter setup, optimal (from the perspective of mechanical
strength) polyamide parts can be obtained by SLS. The greatest influence of the three
factors considered in the study belongs to the energy density. It plays an essential
role both in mechanical strength and stiffness of the SLS manufactured parts.
Acknowledgements This work was supported (in part) by research grant GNaC2018-ARUT,
no.1363/01.02.2019, financed by Politehnica University of Timisoara.
References
1. C.K. Chua, C.H. Wong, W.Y. Yeong, Standards, Quality Control, and Measurement Sciences
in 3D Printing and Additive Manufacturing (Elsevier Inc., 2017)
2. D.I. Stoia, E. Linul, L. Marsavina, Influence of manufacturing parameters on mechanical
properties of porous materials by selective laser sintering. Materials 12, 871 (2019)
3. A. Rajic, E. Desnica, S. Stojadinovic, D. Nedelcu, Numerical simulation and additive manufacturing technology in design of knee implant patterns. J. Optoelectron. Adv. Mater. 16(9–10),
1180–1190 (2014)
4. A. Marin, K. Menyhardt, A.M. Marin, R. Nagy, M. Poenaru, Prototype device for mastoid obliteration in pediatric cholesteatoma patients, in AVMS 2017, Springer Proceedings in Physics,
vol. 198 (Springer, 2018)
5. C. Cosma, N. Balc, M. Moldovan, L. Morovic, P. Gogola, C. Miron-Borzan, Post-processing
of customized implants made by laser beam melting from pure Titanium. J. Optoelectron. Adv.
Mater. 19(11–12), 738–747 (2017)
6. D. Vermesan, I. Trocan, R. Prejbeanu, D.V. Poenaru, H. Haragus, D. Gratian, M. Marrelli, F.
Inchingolo, M. Caprio, R. Cagiano, M. Tatullo, Reduced operating time but not blood loss with
cruciate retaining total knee arthroplasty. J Clin Med Res. 7(3), 171–5 (2015)
7. R. Nagy, R.S. Maruta, K. Menyhardt, Active vibration control of test equipment through feedback algorithm, in AVMS-2017, Springer Proceedings in Physics, vol. 198 (Springer, Berlin,
2018)
8. K. Zhang, G. Fu, P. Zhang, Z. Ma, Z. Mao, D.Z. Zhang, Study on the geometric design of
supports for overhanging structures fabricated by selective laser melting. Materials 12, 27
(2019)