Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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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
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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)

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