Scholarly record
MODELING OF DIMENSIONAL CHANGES IN SOME IRON-BASED POWDER METALLURGY COMPACTS USING AN ARTIFICIAL NEURAL NETWORK
Abstract
Modeling using artificial neural networks (ANNs) is used in most fields of production. An approach to modeling the dimensional changes in some iron-based powder metallurgy (PM) parts during the sintering process is given. The proposed model used is a multilayer neural network with a backpropagation learning algorithm. This type of neural network model gave the best results in the process of modeling. The specimens used in this study are prealloyed iron-based powders. The particle size of the powders is ranging from 45 to 150 ?m. In the first step, the powders were mixed with zinc stearate 1% for 30 minutes, then were single pressed in a die at a pressure of 600 MPa. Following pressing, the green compacts were subject to sintering in a laboratory furnace at 1150? C for 90 and 120 minutes. During the sintering process, there are a great number of the process factors that appear, with an influence on the dimensional changes and also on the final accuracy of a sample (sintering temperature, sintering time, type of the protection atmosphere). It was concluded that the practical effects of the modeling using an ANN in determination of compact dimensions is in accordance with the data obatined by measurements of the dimensional changes during sintering.
Publication Impact Profile
Publication details
References12
Cristofolini, I., Pilla, M., Molinari, A., Menapace, C., & Larsson, M, DOE investigation of anisotropic dimensional change during sintering of iron– copper–carbon. The International Journal of Powder Metallurgy, 48(4), pp. 37– 43, 2012.
Cristofolini, I., Pilla, M., Larsson, M., & Molinari, A., A DOE analysis of dimensional change on sintering of a 3%Cr–0.5%Mo–x%C steel and its effect on dimensional and geometrical precision. Powder Metallurgy Progress, 3(12), pp.127–143, 2012.
Emanuelli, L., Menapace, C., Cristofolini, I., Molinari, A., & Larsson, M., Influence of sintering temperature on shrinkage anisotropy in Cr–Mo low alloy steel green compacts. Advances in Powder Metallurgy and Particulate Materials, 5, pp. 99–107, 2014.
Gurau C., Gurau G., Sampath V., Structural study and phase transformation of Cu-Al-Ni shape memory alloy produced by severe plastic deformation, Indian journal of engineering and materials sciences, volume: 25, issue 1, pp. 5-10, 2018.
Marin M, Potecasu F, Marin F., Potecasu O, Alexandru P., Prediction of porosity in iron-based powder metallurgy (P/M) materials using an image processing software, 16th International Multidisciplinary Scientific Geoconference (SGEM 2016), Conference Proceedings, vol. I, pp. 259-264, 2016.
Baselli, S., & Molinari, A., The geometrical model of sintering. In CD proceedings EuroPM2017 congress and exhibition, Milano (Italy) 1–5 October 2017. Shrewsbury: EPMA, 2017.
Zavaliangos, A., & Bouvard, D., Numerical simulation of anisotropy in sintering due to prior compaction. The International Journal of Powder Metallurgy, 36(7), 58–65, 2000.
Raman, R., Zahrah, T. F., Weaver, T. J., & German, R. M., Predicting dimensional change during sintering of FC0208 parts. Advances in Powder Metallurgy and Particulate Materials, 1(3), pp. 115–122, 1999.
Gething B.A., Heaney D.F., Koss D.A., Mueller T.J, The effect of nickel on the mechanical behavior of molybdenum P/M steels, Materials Science and Engineering A, vol. 390, pp. 19–26, 2005.
Marucci M. L., Hanejko F. G., Effect of copper alloy addition method on the dimensional response of sintered Fe-Cu-C steels, Advances in Powder Metallurgy and Particulate Materials, MPIF, pp. 1–11, 2010.
Chawla N., Babic D., Williams J.J., Polasik S.J., Effect of copper and nickel alloying additions on the tensile and fatigue behavior of sintered steels, Advances in powder metallurgy & particulate materials, part 5, 104. Princeton, NJ: MPIF; 2002.
Singh T., Stephenson T. F., Cambell S.T., Nickel-copper interactions in P/M steels. Advances in Powder Metallurgy and Particulate Materials, compiled by W.B. James and R.A. Chernenkoff, Metal Powder Industries Federation, Princeton, NJ, 7, pp. 7-93, 2004.
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.
