The study investigates the Portevin–Le Chatelier (PLC) effect in the cold-rolled Al-Mg alloy EN AW-5754. The tensile tests were performed on dog bone specimens at test speeds of 10, 20, and 50 mm/min. Digital image correlation (DIC) and infrared thermography were used to monitor strain rate and temperature changes. The results showed a strong correlation between PLC line propagation, strain rate variations, and temperature changes. Regardless of the test speed, the characteristic jagged shape of the material was observed due to the PLC effect. As the deformation progressed, both the strain rate and the temperature increased, with the changes being more pronounced at higher test speeds. DIC and infrared images show that temperature peaks correspond to moments of increased plastic deformation and sudden drops in strain rate. The formation of overlapping PLC lines also showed the random and unpredictable nature of the phenomenon.
Skejić, D., Boko, I., & Torić, N. (2015). Aluminij kao materijal za suvremene konstrukcije. Gradjevinar, 1075–1085.
Romhanji, E., Popović, M., Glišić, D., Stefanović, M., & Milovanović, M. (2024). On the Al-Mg alloy sheets for automotive application: Problems and solutions. Metalurgija, 205–216.
New Trends and Developments in Automotive System Engineering. (2011). InTech. https://doi.org/10.5772/552
Smallman, R., & Ngan, A. (2014). Work hardening and annealing. Modern Physical Metallurgy, 443–471.
Farber, V., Morozova, A., Khotinov, V., Vichuzhanin, D., Karabanalov, M., & Veretennikova, I. (2021). 129–135.
Zhemchuzhnikova, D., Lebyodkin, M., Yuzbekova, D., Lebedkina, T., Mogucheva, A., & Kaibyshev, R. (2018). Interrelation between the Portevin Le-Chatelier effect and necking in AlMg alloys. International Journal of Plasticity, 95–109.
Szalai, S., Harangozó, D., & Czinege, I. (n.d.). Characterisation of inhomogeneous plastic deformation of AlMg sheet metals during tensile tests. IOP Conference Series: Materials Science and Engineering.
Zhemchuzhnikova, D. (2018). Influence of the extreme grain size reduction on plastic deformation instability in an AlMg and AlMgScZr alloys. Materials.
Xu, J., Holmedal, B., Hopperstad, O., Mánik, T., & Marthinsen, K. (2022). Dynamic strain ageing in an AlMg alloy at different strain rates and temperatures: Experiments and constitutive modelling. International Journal of Plasticity, 4–103215.
Lebyodkin, M., Lebedkina, T., Portevin-Le, T., Effect, C., Beyond, J., Brechtl, ;, Peter, K., & Liaw. (n.d.).
Tretyakova, T., Tretyakov, M., & Chechulina, E. (n.d.). Experimental study of the Portevin-Le Chatelier effect under complex loading of Al-Mg alloy, procedure issues. 434–441.
Borisova, Y., Yuzbekova, D., & Mogucheva, A. (2019). Influence of phase composition on Portevin-Le Chatelier effect in Al-Mg alloys. IOP Conference Series: Materials Science and Engineering. https://doi.org/10.1088/1757-
Szalai, S., Harangozó, D., & Czinege, I. (2020). Characterisation of Inhomogeneous Plastic Deformation of AlMg Sheet Metals During Tensile Tests. IOP Conference Series: Materials Science and Engineering, 903(1), 012023. https://doi.org/10.1088/1757-899x/903/1/012023
Yuzbekova, D., Mogucheva, A., Borisova, Yu., & Kaibyshev, R. (2021). On the mechanisms of nucleation and subsequent development of the PLC bands in an AlMg alloy. Journal of Alloys and Compounds, 868, 159135. https://doi.org/10.1016/j.jallcom.2021.159135
Cottrell, A. (1953). Theory of dislocations. Progress in Metal Physics, 18–23. https://doi.org/10.1016/0502-8205(53
Mehenni, M., Ait-Amokhtar, H., & Fressengeas, C. (2019). Spatiotemporal correlations in the Portevin-Le Chatelier band dynamics during the type B -type C transition. Science and Engineering A, 313–318.
Mäkinen, T., Karppinen, P., Ovaska, M., Laurson, L., & Alava, M. J. (2020). Propagating bands of plastic deformation in a metal alloy as critical avalanches. Science Advances, 6(41). https://doi.org/10.1126/sciadv.abc7350
Kang, J., Shi, L., Liang, J., Shalchi-Amirkhiz, B., & Scott, C. (2020). Metals, 1201–1201.
Cho, C.-H., Son, H.-W., Lee, J.-C., Son, K.-T., Lee, J.-W., & Hyun, S.-K. (2020). Effects of high Mg content and processing parameters on Portevin-Le Chatelier and negative strain rate sensitivity effects in Al–Mg alloys. Materials Science and Engineering: A, 779, 139151. https://doi.org/10.1016/j.msea.2020.139151
Jandrlić, I., Rešković, S., & Brlić, T. (2018). Distribution of stress in deformation zone of niobium micro-alloyed steel. Metals and Materials International, 746–751.
Wang, X., Crupi, V., Guo, X., & Zhao, Y. (2010). Quantitative thermographic methodology for fatigue assessment and stress measurement. International Journal of Fatigue, 1970–1976.
Le Cam, J., Robin, E., Leotoing, L., & Guines, D. (2017). Calorimetric analysis of Portevin-Le Chatelier bands under equibiaxial loading conditions in Al-Mg alloys: Kinematics and mechanical dissipation. Mechanics of Materials, 80–88.
Qi, H., Zhang, Q., Cao, P., & Fu, S. (2012). Thermal analyses and simulations of the type A and type B Portevin-Le Chatelier effects in an Al-Mg alloy. Acta Materialia, 1647–1657.
Investigations were performed within research project IP-124 University of Zagreb Faculty of Metallurgy, Centre for Foundry Technology—SIMET, KK.01.1.1.02.0020 and VIRTULAB—Integrated laboratory for primary and secondary raw materials, KK.01.1.1.02.0022.
