THE EXPERIMENTAL INVESTIGATION OF ANNEALING PARAMETERS EFFECTS ON AL2024-T3 MATERIALS’ FORMABILITY AND MECHANICAL PROPERTIES

In this study, the effects of annealing parameters on the formability and mechanical properties of Al2024-T3 sheet material were investigated experimentally. Annealing process were applied at 100 °C, 200 °C, 300 °C, 400 °C annealing temperatures and at 6 minutes, 30 minutes, 60 minutes annealing times. The forming operations were applied in 10 mm / sec deformation velocity and in V bending dies with an angle of 30 °, 60 °, 90 °, 120 °. In the experimental studies, it was determined that there was no significant change in the hardness values of the specimens at temperatures less than 300 ° C annealing temperature and 6 minutes annealing time parameters, but an irregular changes were observed in the mechanical properties of specimens. However, it was observed that there were a significant decrease in the hardness values and mechanical properties of the test specimens after the annealing temperature of 300 ° C and the annealing time of 6 minutes. It has been observed that the samples only has been formed successfully in a 30 ° die angle and at low temperatures (RT - 100 ° C - 200 ° C). It has been observed that a successful forming process has been performed in 30 ° and 60 ° die angles by increasing the annealing parameters values (400 ° C - 30 min or 400 ° C - 60 min). However, forming defects such as cracks and fractures were encountered in forming processes using 90 ° and 120 ° die angled.

___

  • L. Wanga, M. Strangwoodb, D. Balinta, J. Lina, T.A. Deanc, “Formability and failure mechanisms of AA2024 under hot forming conditions”, Materials Science and Engineering A, 528, pp.2648–2656, 2011.
  • Irfan Mahmood Khan M. I., Umair Ismail, D. Noman, M. Zeeshan Siddiqui and M. Shahzad, “Effect of Process Parameters on Formability of Aluminum 2024”, Journal of Space Technology, Vol 7, No 1, 2017.
  • Ortiz, D., Abdelshehid, M., Dalton, R., Soltero, J., Clark, R., Hahn, M., ... & Stoyanov, P., “Effect of cold work on the tensile properties of 6061, 2024, and 7075 Al alloys”, Journal of Materials Engineering and Performance, Volume 16, Issue 5, pp. 515–520, 2007.
  • Moy, C. K. S., Weiss, M., Xia, J., Sha, G., Ringer, S. P., “Influence of heat treatment on the microstructure, texture and formability of 2024 aluminium alloy”, Materials Science and Engineering A 552, pp.48–60, 2012.
  • Fujda, M., Mišičko, R., Rusňáková, L., & Sojko, M. “Effect of solution annealing temperature on structure and mechanical properties of EN AW 2024 aluminium alloy”, Journal of Metals, Materials and Minerals, Vol 17 No.1 pp. 35-40, 2017.
  • Reis, D. A. P., Couto, A. A., Domingues Jr, N. I., Hirschmann, A. C. O., Zepka, S., Moura neto, C., “Effect of artificial aging on the mechanical properties of an aerospace aluminum alloy 2024”, Defect and Diffusion Forum Vols. 326, pp. 193-198, 2012.
  • Merklein, M., Böhm, W., & Lechner, M., “Tailoring material properties of aluminum by local laser heat treatment”, Physics Procedia, 39, pp. 232-239, 2012.
  • Mohammadia, A., Vanhovea, H., Baelb, H. A., and Dufloua, J. R., “Bending properties of locally laser heat treated AA2024-T3 aluminium alloy”, Physics Procedia, 39, pp. 257-264, 2012.
  • Chen, G., Chen, M., Wang, N., and Sun, J., “Hot forming process with synchronous cooling for AA2024 aluminum alloy and its application”, The International Journal of Advanced Manufacturing Technology, 86, pp. 133–139, 2016.
  • LeMaster R., Boggs, B., Hubbard, C., Watkins, T., “Grinding induced changes in residual stresses of carburized gears”, Gear Technology, March/April, pp.42-49, 2015.