Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
권호 표지
DOI QR코드

DOI QR Code

Deterioration Characteristics of Naturally Aged AA 2026 due to ExpoSure to High Temperatures

자연 시효 처리된 AA 2026의 고온 노출에 따른 물성 열화 특성에 대한 연구

  • HaNeul Kim (Department of Materials Processing and Engineering, Inha Manufacturing Innovation School) ;
  • HyeonWoo Kang (Department of Materials Processing and Engineering, Inha Manufacturing Innovation School) ;
  • ByoungLok Jang (Department of Materials Processing and Engineering, Inha Manufacturing Innovation School) ;
  • HeeKook Kim (Department of Materials Processing and Engineering, Inha Manufacturing Innovation School)
  • 김하늘 (인하대학교 제조혁신전문대학원 첨단소재공정공학과) ;
  • 강현우 (인하대학교 제조혁신전문대학원 첨단소재공정공학과) ;
  • 장병록 (인하대학교 제조혁신전문대학원 첨단소재공정공학과) ;
  • 김희국 (인하대학교 제조혁신전문대학원 첨단소재공정공학과)
  • Received : 2024.04.02
  • Accepted : 2024.05.14
  • Published : 2024.05.30
Download PDF
⟨ Previous Next ⟩

Abstract

AA 2026, which is used as an aviation material, is an improved version of 2024 and has higher physical properties, and is a material that has the potential to be applied to supersonic aircraft to be developed in the future. However, when an aircraft exceeds supersonic speeds, the surface heats up and the material must be resistant to this. Therefore, this study confirmed the high-temperature properties of AA 2026, an aviation structural material. AA 2026, solution treated at 500℃ for 4hr, was naturally aged at room temperature for more than 168 hr. Changes in microstructure and physical properties were confirmed over several hours of exposure to 100℃, 200℃, and 300℃, respectively. As a result of microstructure analysis, there was no significant change at 100℃, and from 200℃, GPB, a strengthening mechanism, grew and formed an S Phase. It was confirmed that the S Phase grew as the exposure time increased. Through a tensile test, it was confirmed that physical properties deteriorated as the precipitates grew. However, it was confirmed that the properties were stably maintained at 100℃, which is the temperature when the speed of a supersonic aircraft is less than Mach 2.

Keywords

Acknowledgement

이 연구는 2024년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원에 의한 연구임(20017370)

References

  1. Zheng, Yan., et al. "Effects of Cu content and Cu/Mg ratio on the microstructure and mechanical properties of Al-Si-Cu-Mg alloys." J. All. Comp., 649 (2015): 291-296.  https://doi.org/10.1016/j.jallcom.2015.07.090
  2. Garcia-Hern-ndez, J. L., et al. "Influence of plastic deformation and Cu/Mg ratio on the strengthening mechanisms and precipitation behavior of AA2024 aluminum alloys." J. Mater. Res. Tech., 8.6 (2019): 5471-5475.  https://doi.org/10.1016/j.jmrt.2019.09.015
  3. Ebrahimi, G. R., and H. R. Ezatpour. "Effect of precipitation on the warm deformation behavior of AA2024 alloy." Mater. Sci. Eng. A, 681 (2017): 10-17.  https://doi.org/10.1016/j.msea.2016.11.015
  4. Can, L. I. U., Hui Zhang, and Fu-lin Jiang. "Characterization of dynamic microstructure evolution during hot deformation of Al-4.10 Cu-1.42 Mg-0.57 Mn-0.12 Zr alloy." Trans. Nonfer. Met. Soc. Chi., 24.11 (2014): 3477-3485.  https://doi.org/10.1016/S1003-6326(14)63491-9
  5. Huang, Xudong., et al. "Hot deformation behavior of 2026 aluminum alloy during compression at elevated temperature." Mater. Sci. Eng. A, 527.3 (2010): 485-490.  https://doi.org/10.1016/j.msea.2009.09.042
  6. Roven, Hans J., Manping Liu, and Jens C. Werenskiold. "Dynamic precipitation during severe plastic deformation of an Al-Mg-Si aluminium alloy." Mater. Sci. Eng. A, 483 (2008): 54-58.  https://doi.org/10.1016/j.msea.2006.09.142
  7. Mao, J., S. B. Kang, and J. O. Park. "Grain refinement, thermal stability and tensile properties of 2024 aluminum alloy after equal-channel angular pressing." J. Mater. Proc. Tech., 159.3 (2005): 314-320.  https://doi.org/10.1016/j.jmatprotec.2004.05.020
  8. Zhan, Xuepeng., et al. "Dynamic recrystallization and solute precipitation during friction stir assisted incremental forming of AA2024 sheet." Mater. Char., 174 (2021): 111046. 
  9. Kang, HyeonWoo., et al. "High Temperature Deformation and Microstructural Evolution of Homogenized AA 2026 Alloy." Kor. J. Met. Mater., 61.5 (2023): 338-346.  https://doi.org/10.3365/KJMM.2023.61.5.338
  10. Song, Y. F., et al. "Effects of two-stage aging on the dimensional stability of Al-Cu-Mg alloy." J. All. Comp., 701 (2017): 508-514.  https://doi.org/10.1016/j.jallcom.2017.01.139
  11. Ning, Ai-Lin., Zhi-Yi Liu., and Su-Min Zeng. "Effect of large cold deformation on characteristics of age-strengthening of 2024 aluminum alloys." Trans. Nonfer. Met. Soc. Chi., 16.5 (2006): 1121-1128.  https://doi.org/10.1016/S1003-6326(06)60388-9
  12. Pakravan, K., A. Hosseini Monazzah, and S. Farahmand. "Ageing condition of tensile specimens: fracture behavior of notched Al2024 sheet under tensile loading." Mater. Res. Exp., 7.5 (2020): 056522. 
  13. Nourbakhsh, Said, and J. Nutting. "The high strain deformation of an aluminium-4% copper alloy in the supersaturated and aged conditions." Acta Metal., 28.3 (1980): 357-365.  https://doi.org/10.1016/0001-6160(80)90170-4
  14. Zhao, Y. L., et al. "Double-peak age strengthening of cold-worked 2024 aluminum alloy." Acta Mater., 61.5 (2013): 1624-1638.  https://doi.org/10.1016/j.actamat.2012.11.039
  15. Xu, C., et al. "Control of dislocation density maximizing precipitation strengthening effect." J. Mater. Sci. Tech., 127 (2022): 133-143.  https://doi.org/10.1016/j.jmst.2022.03.010
  16. Lin, Y. C., et al. "Precipitation hardening of 2024-T3 aluminum alloy during creep aging." Mater. Sci. Eng. A, 565 (2013): 420-429.  https://doi.org/10.1016/j.msea.2012.12.058
  17. Pantelakis, Sp., et al. "Creep resistance of aluminium alloys for the next generation supersonic civil transport aircrafts." Theo. App. Frac. Mech., 31.1 (1999): 31-39.  https://doi.org/10.1016/S0167-8442(98)00064-0
  18. Cha, Jong Hyun., et al. "Variation of supersonic aircraft skin temperature under different Mach number and structure." J. Kor. Inst. Mil. Sci. Tech., 17.4 (2014): 463-470.  https://doi.org/10.9766/KIMST.2014.17.4.463
  19. Kovarik, L., et al. "SA Court, HL Fraser, MJ Mills." Acta Mater., 56.17 (2008): 4804-15.  https://doi.org/10.1016/j.actamat.2008.05.042
  20. Parel, T. S., S. C. Wang, and M. J. Starink. "Hardening of an Al-Cu-Mg alloy containing Types I and II S phase precipitates." Mater. Des., 31 (2010): S2-S5.  https://doi.org/10.1016/j.matdes.2009.12.048
  21. Guia-Tello, J. C., et al. "Effect of plastic deformation on the precipitation sequence of 2024 aluminum alloy." J. Mat. Sci. (2022): 1-14. 
  22. Lee, Seunggwan, and Chungseok Kim. "Dissolution and Melting Phenomenon of Al 2 Cu according to Solution Treatment Temperature of Al12Si3Cu alloy." J. Kor. Soc. Heat Treatment 35.1 (2022): 1-7. 
  23. Wang, Lei, et al. "Superior high creep resistance of in situ nano-sized TiCx/Al-Cu-Mg composite." Scientific reports 7.1 (2017): 4540.