Development of a novel high strength and toughness Al–Cu–Li alloy casting billet with a new process

Li, Jianyu; Pan, Yu; Zhao, Dijia; Lü, Shulin; Wu, Shusen; Guo, Wei

doi:10.1016/j.msea.2022.143827

Cited by 19 publications

(3 citation statements)

References 31 publications

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“…Unlike SEM samples, EPMA samples do not need to be etched with Keller's corrosive before characterization. To conform with the GB/T228.1-2010 Chinese Standard (equivalent to ASTM A370-2016) [10], tensile samples were obtained from the ingot through a process of wire cutting and machining. To guarantee accuracy, three tensile rods were taken from each sample, and the average values were taken as the final mechanical properties.…”

Section: Methodsmentioning

confidence: 99%

“…Due to the limitation of the plastic forming process, some large and complex parts can only be formed via the casting method. Moreover, Al-Li cast alloys are isotropic, which allows for a higher Li content to enhance their potential for reduced weight and increased elastic modulus [10]. Therefore, it is important to develop Al-Li cast alloy materials or castings.…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of Strength–Ductility Synergy of Al-Li Cast Alloy via New Forming Processes and Sc Addition

Lü,

Yan,

Pan

et al. 2024

Materials

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In this study, concurrent enhancements in both strength and ductility of the Al-2Li-2Cu-0.5Mg-0.2Zr cast alloy (hereafter referred to as Al-Li) were achieved through an optimized forming process comprising ultrasonic treatment followed by squeeze casting, coupled with the incorporation of Sc. Initially, the variations in the microstructure and mechanical properties of the Sc-free Al-Li cast alloy (i.e., alloy A) during various forming processes were investigated. The results revealed that the grain size in the UT+SC (ultrasonic treatment + squeeze casting) alloy was reduced by 76.3% and 57.7%, respectively, compared to those of the GC (gravity casting) or SC alloys. Additionally, significant improvements were observed in its compositional segregation and porosity reduction. After UT+SC, the ultimate tensile strength (UTS), yield strength (YS), and elongation reached 235 MPa, 135 Mpa, and 15%, respectively, which were 113.6%, 28.6%, and 1150% higher than those of the GC alloy. Subsequently, the Al-Li cast alloy containing 0.2 wt.% Sc (referred to as alloy B) exhibited even finer grains under the UT+SC process, resulting in simultaneous enhancements in its UTS, YS, and elongation. Interestingly, the product of ultimate tensile strength and elongation (i.e., UTS × EL) for both alloys reached 36 GPa•% and 42 GPa•%, respectively, which is much higher than that of other Al-Li cast alloys reported in the available literature.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancement of Strength–Ductility Synergy of Al-Li Cast Alloy via New Forming Processes and Sc Addition

Lü,

Yan,

Pan

et al. 2024

Materials

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“…This alloy is free of Ag, Zn, Zr, RE, etc. [9]. In study elsewhere, a Ti48Al2Cr2Nb2.5C alloy was fabricated by arc melting, then subjected to ultrasound treatment across a spectrum of temperature gradients to investigate the correlation between melt superheat and ultrasonic action [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ultrasonic Treatment on Ti/Al Composite using Squeeze Casting: Microstructural Analysis and Mechanical Properties

Singh

et al. 2024

Int. Res. J. multidiscip. Technovation

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To segregate the Titanium (Ti) from the reinforcements of the molten scrap of Titanium/Aluminum (Ti/Al) composite, application of ultrasonic vibration is known to be one of the sound techniques. Various studies have been looked at the effect of ultrasonic vibration on the melting process, however not much have been investigated with respect to the solidification process. To fabricate Ti/Al composites in situ, ultrasonic vibration can be effectively used to compress the solidifying melt during the casting process. In this line, the present study focused to investigate the influence of ultrasonic vibration and squeeze pressure on solidification behavior of the α-Al matrix, characteristics of the matrix-reinforcements interface, and distribution of reinforcements. The experimental data indicated that when the amplitude was 60 μm, the Vickers hardness, yield strength, and tensile strength of composites increased by 8.6, 3.9, and 3.1 %, respectively, due to gravity casting. While the squeeze pressure was increased from 50 to 100 MPa, the mean grain size decreased from 90 to 60 μm during the ultrasonic aided squeeze casting (SC) process. However, as the squeeze pressure was raised, the microstructures became coarser and the mechanical characteristics weakened. Yield strength, and tensile strength were increased by 18.7% and 3.2%, respectively, when the squeeze pressure was 100 MPa.

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Diffusion Bonding Process and Interface Performance of 2198 Al-Li Alloy

Jiang,

Yang,

et al. 2023

Lecture Notes in Mechanical Engineering

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Development of a novel high strength and toughness Al–Cu–Li alloy casting billet with a new process

Cited by 19 publications

References 31 publications

Enhancement of Strength–Ductility Synergy of Al-Li Cast Alloy via New Forming Processes and Sc Addition

Enhancement of Strength–Ductility Synergy of Al-Li Cast Alloy via New Forming Processes and Sc Addition

Effect of Ultrasonic Treatment on Ti/Al Composite using Squeeze Casting: Microstructural Analysis and Mechanical Properties

Diffusion Bonding Process and Interface Performance of 2198 Al-Li Alloy

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