A review of manufacturing processes, mechanical properties and precipitations for aluminum lithium alloys used in aeronautic applications

Hajjioui, El Arbi; Bouchaâla, Kenza; Faqir, Mustapha; Essadiqi, E.

doi:10.1016/j.heliyon.2022.e12565

Cited by 41 publications

(15 citation statements)

References 179 publications

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“…The 1421 alloy exhibited elevated levels of yield stress and ultimate strength. However, a notable flaw of these alloys lies in their diminished toughness, primarily attributed to the shearing of Al 3 Li, recognized as the predominant strengthening phase [40]. The weld-ability improvement and solid selection can be obtained by adding 5:2wt% Mg [41].…”

Section: St-generation Al-li Alloysmentioning

confidence: 99%

Improving the properties of aluminum-lithium composites in aerospace applications: review

Polayya,

Rao,

Veeresh Kumar

2024

Eng. Res. Express

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Aluminium (Al)-Lithium (Li) alloys have found widespread applications in aerospace and military domains. Primarily, they are found to have low density, leading to weight savings and several economic considerations. The paper explores the historical development of Al-Li alloys across distinct generations, highlighting their evolution. It also delves into the diverse applications of Al-Li alloys in aerospace and military domains. A concise discussion of the mechanical behaviour and tensile strengths is presented across the first, second, and third generations of Al-Li alloys. This review includes a discussion on microstructural investigation, emphasizing metallurgical factors such as increased efficiency, various precipitate phases, and intergranular features. Weldability and tribological properties of Al-Li alloys, with a specific emphasis on the corrosion aspects of these alloys are discussed. Furthermore, the review assesses the future development and manufacturing flexibility of Al-Li Metal Matrix Composites. In summary, this comprehensive review consolidates insights into the utilization, evolution, and characteristics of Al-Li Metal Matrix Composites, providing valuable information for researchers and practitioners aiming to enhance the performance of these alloys in aerospace applications.

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Section: St-generation Al-li Alloysmentioning

confidence: 99%

Improving the properties of aluminum-lithium composites in aerospace applications: review

Polayya,

Rao,

Veeresh Kumar

2024

Eng. Res. Express

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“…Third-generation Al-Li-based alloys replace conventional Al alloys due to their excellent mechanical properties such as toughness, stiffness and high specific strength and anticorrosion ability, suitable for manufacturing aircraft and automotive parts and construction components (Alam and Sinha, 2019;Ali et al, 2018;Hajjioui et al, 2023;Xiao et al, 2020). In recent days, cold metal transfer (CMT) based on metal-inert gas (MIG) welding has had greater importance for welding aluminum alloys owing to stable arc, low heat input, low spatter and high gap bridging (Selvi et al, 2021;Shanker and Wattal, 2022).…”

Section: Introductionmentioning

confidence: 99%

Multicriteria decision-making for optimization of welding parameters in cold metal transfer and pulse metal-inert gas weld bead of AA2099-T86 alloy using CRITIC and ROV methods

Singh,

Yuvaraj,

Wattal

2024

MMMS

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PurposeThe criteria importance through intercriteria correlation (CRITIC) and range of value (ROV) combined methods were used to determine a single index for all multiple responses.Design/methodology/approachThis paper used cold metal transfer (CMT) and pulse metal-inert gas (MIG) welding processes to study the weld-on-bead geometry of AA2099-T86 alloy. This study used Taguchi's approach to find the optimal setting of the input welding parameters. The welding current, welding speed and contact-tip-to workpiece distance were the input welding parameters for finding the output responses, i.e. weld penetration, dilution and heat input. The L9 orthogonal array of Taguchi's approach was used to find out the optimal setting of the input parameters.FindingsThe optimal input welding parameters were determined with combined output responses. The predicted optimum welding input parameters were validated through confirmation tests. Analysis of variance showed that welding speed is the most influential factor in determining the weld bead geometry of the CMT and pulse MIG welding techniques.Originality/valueThe heat input and weld bead geometry are compared in both welding processes. The CMT welding samples show superior defect-free weld beads than pulse MIG welding due to lesser heat input and lesser dilution.

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“…These alloys are known for their high strength-to-weight ratio, excellent corrosion resistance, and good formability [ 2 , 3 , 4 ]. Based on these characteristics and their mechanical properties, these alloys are used widely in the automotive and aerospace industries, transportation, and other applications where lightweight and corrosion-resistant materials are required [ 5 , 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

High-Cycle Fatigue Behaviour of the Aluminium Alloy 5083-H111

et al. 2023

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This study presents a comprehensive experimental investigation of the high-cycle fatigue (HCF) behaviour of the ductile aluminium alloy AA 5083-H111. The analysed specimens were fabricated in the rolling direction (RD) and transverse direction (TD). The HCF tests were performed in a load control (load ratio R = 0.1) at different loading levels under the loading frequency of 66 Hz up to the final failure of the specimen. The experimental results have shown that the S–N curves of the analysed Al-alloy consist of two linear curves with different slopes. Furthermore, RD-specimens demonstrated longer fatigue life if compared to TD-specimens. This difference was about 25% at the amplitude stress 65 MPa, where the average fatigue lives 276,551 cycles for RD-specimens, and 206,727 cycles for TD-specimens were obtained. Similar behaviour was also found for the lower amplitude stresses and fatigue lives between 106 and 108 cycles. The difference can be caused by large Al6(Mn,Fe) particles which are elongated in the rolling direction and cause higher stress concentrations in the case of TD-specimens. The micrography of the fractured surfaces has shown that the fracture characteristics were typical for the ductile materials and were similar for both specimen orientations.

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A review of manufacturing processes, mechanical properties and precipitations for aluminum lithium alloys used in aeronautic applications

Cited by 41 publications

References 179 publications

Improving the properties of aluminum-lithium composites in aerospace applications: review

Improving the properties of aluminum-lithium composites in aerospace applications: review

Multicriteria decision-making for optimization of welding parameters in cold metal transfer and pulse metal-inert gas weld bead of AA2099-T86 alloy using CRITIC and ROV methods

High-Cycle Fatigue Behaviour of the Aluminium Alloy 5083-H111

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