Friction stir weld of 2060 Al–Cu–Li alloy: Microstructure and mechanical properties

Cai, Biao; Zheng, Zi Qiao; He, Dao‐Guang; Li, S.C.; Li, H.P.

doi:10.1016/j.jallcom.2015.02.124

Cited by 87 publications

(32 citation statements)

References 29 publications

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“…Friction stir welding technology has successfully shown the ability to join multiple materials, including high-strength aluminum alloys not capable of being joined through conventional welding [8][9][10][11][12][13][14][15][16]. Although aluminum-lithium alloys have shown some success in electron beam welding [17], laser beam welding [18], and fiber laser welding [19], FSW has exhibited better microstructural and mechanical properties without the inefficiencies seen with other welding techniques [20][21][22][23].While the mechanical properties [24][25][26][27][28] and fatigue life [20,29,30] of FSW Al-Li alloys have been quantified in limited studies, a lack of information exists concerning the fatigue behavior of aluminum lithium 2099 (AA2099) joined via FSW. As such, to best of the authors' knowledge, this is first study to investigate the structure-property-fatigue performance relationship of FSW of AA2099.…”

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confidence: 99%

“…While the mechanical properties [24][25][26][27][28] and fatigue life [20,29,30] of FSW Al-Li alloys have been quantified in limited studies, a lack of information exists concerning the fatigue behavior of aluminum lithium 2099 (AA2099) joined via FSW. As such, to best of the authors' knowledge, this is first study to investigate the structure-property-fatigue performance relationship of FSW of AA2099.…”

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confidence: 99%

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Experiments and Modeling of Fatigue Behavior of Friction Stir Welded Aluminum Lithium Alloy

Cisko

Jordon

Avery

et al. 2019

Metals

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An extensive experimental and computational investigation of the fatigue behavior of friction stir welding (FSW) of aluminum–lithium alloy (AA2099) is presented. In this study, friction stir butt welds were created by joining AA2099 using two different welding parameter sets. After FSW, microstructure characterization was carried out using microhardness testing, scanning electron microscopy, and transmission electron microscopy techniques. In particular, the metastable strengthening precipitates T1 (Al2CuLi) and δ’(Al3Li) seen in the base metal were observed to coarsen and dissolve due to the FSW process. In order to evaluate the static and fatigue behavior of the FSW of the AA2099, monotonic tensile and fully-reversed strain-controlled fatigue testing were performed. Mechanical testing of the FSW specimens found a decrease in the ultimate tensile strength and fatigue life compared to the base metal. While the process parameters had an effect on the monotonic properties, no significant difference was observed in the number of cycles to failure between the FSW parameters explored in this study. Furthermore, post-mortem fractography analysis of the FSW specimens displayed crack deflection, transgranular fracture, and delamination failure features commonly observed in other parent Al–Li alloys. Lastly, a microstructurally-sensitive fatigue model was used to elucidate the influence of the FSW process on fatigue life based on variations in grain size, microhardness, and particle size in the AA2099 FSW.

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Experiments and Modeling of Fatigue Behavior of Friction Stir Welded Aluminum Lithium Alloy

Cisko

Jordon

Avery

et al. 2019

Metals

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“…Ligas de Al-Nb-B tipicamente apresentam esse comportamento, o qual é conhecido como segregação inversa. As morfologias macro e microestruturais apresentam forte influência na resistência à corrosão e também de microestruturas de ligas de alumínio (JIA et al, 2015;CAI et al, 2015). Geralmente, o processo de resistência à corrosão depende da taxa de resfriamento imposta durante a solidificação, que afeta no tamanho dos braços dendríticos, na redistribuição de soluto, e no comportamento eletroquímico do soluto e solvente dependendo de como são distribuídos.…”

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Propriedade microestrutural do refinamento da liga amorfa Al54Nb45B5 por moagem mecânica

Nascimento

2016

Semina: Tech. Ex.

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54 Nb 45 B 5 amorphous alloy which becomes a potent heterogeneous nucleation on the substrate for nucleation with dendritic presence of aluminum oxides due to diffusive processes on the surface of the amorphous alloy Al 54 Nb 45 B 5 . This alloy is extremely low cost and can be applied in many sectors of the chemical and petrochemical industry because its mechanical deformation is high due to the presence of (Nb or B) in the aluminum acting mainly as grain refiners to improve their mechanical and thermal properties by using the mechanical alloying. The combined use of Niobium and Boron (intermetallic phases are formed by adding Al and Nb powder), instead of Niobium or Boron, individually, is a highly effective way to refine the grain size of alloy Al Nb-B in its microstructure without causing inconvenience in lattice for unwanted deformations. For this purpose, the present study compares the effect of grain refining promoted by the addition of Niobium and Boron in Al 54 Nb 45 B 5 obtained by high energy mill under argon atmosphere and characterized by X rays Diffraction (XRD), Scanning Electron Microscopy and Energy Dispersive (SEM/EDS). Propriedade microestrutural do refinamento da liga amorfa

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“…In these researches, nanostructure produced in-situ aluminium alloy by FSW, or processing has been reported rarely. Although Cai et al [8] reported that the various strengthening precipitates (θ and S phases) were dissolved in the nugget zone where dense dislocations and nano-sized co-clusters were found in the joints of Al-Cu-Li alloys by FSW. Kumar et al [9] also reported that the typical nano-sized grains in a magnesium alloy were achieved for the study of magnesium alloys using an FSP technique.…”

Section: Introductionmentioning

confidence: 99%

Micro-nano structure and characterization in the nugget zone of Al-Cu-Mg alloy under friction stir processing

Sun¹,

Liu²,

Chen³

et al. 2020

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In this paper, the microstructure in the nugget zone of a friction-stir-processed Al-Cu-Mg alloy was analysed. There are the irregular bulk precipitates and micro-voids in the Al-Cu-Mg alloys. These precipitates were the compounds of Al-Cu system, and the size is less than 1 µm. In a local area, the homogeneous amorphous structure of Al-Cu system in some area of the nugget zone was also detected. The amorphous structure with a halo pattern has a structure characteristic of the long-range disorder. The formation of micro-nano and amorphous structure in the nugget zone could be attributed to the severe plastic deformation, breaking effect of stir tool, higher temperature gradient, hydrostatic pressure and shear stress and strain.

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Friction stir weld of 2060 Al–Cu–Li alloy: Microstructure and mechanical properties

Cited by 87 publications

References 29 publications

Experiments and Modeling of Fatigue Behavior of Friction Stir Welded Aluminum Lithium Alloy

Experiments and Modeling of Fatigue Behavior of Friction Stir Welded Aluminum Lithium Alloy

Propriedade microestrutural do refinamento da liga amorfa Al54Nb45B5 por moagem mecânica

Micro-nano structure and characterization in the nugget zone of Al-Cu-Mg alloy under friction stir processing

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