Improving heat resistance of Al–Cu–Li alloy with the addition of Sc and Si

Xue, Hao; Li, Jiaming; Wang, Zhiqi; Bai, Junyuan; Zhao, Zhihao; Qin, Gaowu

doi:10.1007/s40843-023-2664-7

Sci. China Mater.

2023

DOI: 10.1007/s40843-023-2664-7

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Improving heat resistance of Al–Cu–Li alloy with the addition of Sc and Si

Hao Xue,

Jiaming Li,

Zhiqi Wang

et al.

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2024

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Cited by 6 publications

References 51 publications

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Effect of Fatigue and Precorrosion Fatigue on Fatigue Crack Propagation and Fracture Failure Behavior of 5B70 Aluminum Alloy

Zhang,

Jin,

et al. 2024

Adv Eng Mater

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Aluminum alloys are ideal lightweight structural materials for spacecraft, but they are susceptible to local corrosion during service. Herein, a systematic investigation is carried out to determine the fatigue behavior of 5B70 aluminum alloy under salt spray precorrosion. The mechanism of salt spray corrosion, fatigue life, crack propagation, and failure fracture mechanism of 5B70 aluminum alloy are studied. Under the salt spray corrosion, 5B70 aluminum alloy mainly undergoes pitting corrosion via a galvanic corrosion mechanism. After precorrosion, the formation of macroscopic fatigue cracks is accelerated, which significantly reduces its fatigue life. Fracture occurs due to single crack initiation and propagation under fatigue conditions. The fatigue crack tip undergoes a mixture of intergranular and transgranular modes, but mainly transgranular mode. Multiple strain localization phenomena occur during precorrosion fatigue, and corrosion pits on the surface provide a tortuous crack propagation path; the fatigue crack tip is mainly transgranular mode.

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Effect of Fatigue and Precorrosion Fatigue on Fatigue Crack Propagation and Fracture Failure Behavior of 5B70 Aluminum Alloy

Zhang,

Jin,

et al. 2024

Adv Eng Mater

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Research progress on microstructure tuning of heat-resistant cast aluminum alloys

Li,

Wang,

Bai

et al. 2024

J Mater Sci

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With development of present energy-saving society, lightweight and green development in the automotive and aerospace industries have put forward urgent demands for heat-resistant cast aluminum alloys. Present cast aluminum alloys are of lightweight and have excellent mechanical properties when serving in ambient environment. However, when serving at temperatures of 200–300 ℃ or even higher, the alloys inevitably soften and the high-temperature mechanical properties decline rapidly, hardly meeting the requirements for high-performance equipments. This paper summarizes the development process of classic heat-resistant aluminum alloys, especially the microstructural characteristics of heat-resistant cast aluminum alloys in the past decade, and reviews the current microstructure tuning strategies of heat-resistant aluminum alloys from the aspects of intrinsic heat resistance of the second phases, phase interface modification, diffusion-controlled phase transition, grain boundary stabilization and composite material design. Finally, we propose the prospects for the future development of heat-resistant aluminum alloys. Graphical abstract

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Effect of Thermal Exposure on the Microstructure and Mechanical Properties of 2A97 Al-Li Alloy

Liu,

Guo,

Yang

et al. 2024

J. of Materi Eng and Perform

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Improving heat resistance of Al–Cu–Li alloy with the addition of Sc and Si

Cited by 6 publications

References 51 publications

Effect of Fatigue and Precorrosion Fatigue on Fatigue Crack Propagation and Fracture Failure Behavior of 5B70 Aluminum Alloy

Effect of Fatigue and Precorrosion Fatigue on Fatigue Crack Propagation and Fracture Failure Behavior of 5B70 Aluminum Alloy

Research progress on microstructure tuning of heat-resistant cast aluminum alloys

Effect of Thermal Exposure on the Microstructure and Mechanical Properties of 2A97 Al-Li Alloy

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