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논문 기본 정보

자료유형
학술저널
저자정보
Jinwoo Ahn (Defense Agency for Technology and Quality) Taehwan Kim (Defense Agency for Technology and Quality)
저널정보
한국기계가공학회 한국기계가공학회지 한국기계가공학회지 제19권 제4호
발행연도
2020.4
수록면
1 - 8 (8page)

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초록· 키워드

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Mechanical components that support structures in aerospace and power generation industries require high-strength materials. Particularly, in the aerospace industry, aluminum alloys, titanium alloys, and composite materials are increasingly used due to their high maneuverability and durability to withstand low temperature extreme environments; however, ultra-high-strength steel is still used in key components under heavy loads such as landing gears. In this paper, the fault cause analysis and troubleshooting of aircraft parts made of ultra-high-strength steel (300M) broken during normal operation are described. To identify the cause of the defect, a temporary inspection of the same aircraft was performed, and material testing, non-destructive inspection, microstructure examination, and fracture area inspection of the damaged parts were performed. Fracture analysis results showed that a crack in the shape of a branch developed from the tool mark in the direction of the intergranular strain. Based on the results, the cause of fracture was confirmed to be stress corrosion.

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ABSTRACT
1. Introduction
2. Target of Trouble Shooting
3. Damage Analysis and Consideration
4. Conclusion
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