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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.8
- 수록면
- 2,077 - 2,092 (16page)
- DOI
- 10.1007/s12540-024-01634-8
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초록· 키워드
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This work investigates the influence of initial microstructure characteristics on the creep age forming behavior, mechanicalanisotropy and fatigue crack growth resistance of creep age formed components. Components made by 2050 Al–Li alloywith fine, coarse and fibrous grain structures were prepared. The results indicate that the components with fibrous grainssignificantly increases the creep strain, which were generated by large-strain pre-deformation. Additionally, these componentsexhibit the highest yield and ultimate tensile strengths. On the other hand, components with coarse grains demonstratesuperior fatigue crack growth resistance compared to other microstructures. Conversely, components with fine grains exhibitthe lowest in-plane anisotropy value. The fatigue crack growth resistance of the three microstructures follows a descendingorder of coarse grains, fine grains, and fibrous grains. For applications requiring less anisotropy, the AA2050 alloy withfine grains is recommended. Conversely, the alloy with coarse grains is suitable for components subjected to cyclic loading.
Lastly, the alloy with fibrous grains is ideal for structural components due to its high ultimate tensile strength and creep strain.
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