Laser welding of the high-strength Al–Cu–Li alloy

Маликов, А. Г.; Orishich, A. M.

doi:10.1007/s00170-017-0860-6

Cited by 16 publications

(2 citation statements)

References 29 publications

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“…In addition to low heat input welding processes such as laser beam welding (LBW) [21], the applied cooling media (e.g., underwater condition) can improve the mechanical properties of FSWed joints by optimizing the weld microstructure [22][23][24]. The underwater condition compared to other types of welding methods can also result in improved microstructure and mechanical properties [25][26][27][28], which confirms the advantages of submerged processes.…”

Section: Introductionmentioning

confidence: 76%

Submerged Dissimilar Friction Stir Welding of AA6061 and AA7075 Aluminum Alloys: Microstructure Characterization and Mechanical Property

Heidarzadeh

Javidani

Mofarrehi

et al. 2021

Metals

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The possibility of underwater dissimilar friction stir welding of AA6061 and AA7075 aluminum alloy was explored to overcome the problem of hardness loss in different microstructural zones. Optical microscopy and electron backscattered diffraction were employed to characterize the microstructure of the joint. Vickers hardness measurements were conducted on the cross-section of the joint to evaluate the mechanical strengths. The results showed that the microstructure of the AA7075 side had undergone the same mechanisms as those occurring during conventional friction stir welding. In the case of the AA6061 side, in addition to typical restoration mechanisms, the grain subdivision was observed. The AA7075 side had finer grains compared to the AA6061 side, which may be related to the different morphology and size of precipitates. Moreover, friction stir welding caused a reduction in the hardness values in all the microstructural areas compared to those of corresponding base materials. For example, it caused a reduction in the hardness of a thermomechanically affected zone from 105 HV to 93 HV in the AA6061 side, and from 187 HV to 172 HV in the AA7075 side. The underwater media improved the overall hardness values in thermo-mechanically affected zones (13% reduction in hardness) compared to those reported in literature (57% reduction in hardness).

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Section: Introductionmentioning

confidence: 76%

Submerged Dissimilar Friction Stir Welding of AA6061 and AA7075 Aluminum Alloys: Microstructure Characterization and Mechanical Property

Heidarzadeh

Javidani

Mofarrehi

et al. 2021

Metals

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show abstract

“…It has been shown 19,20 that the formation of dendritic structures in the Al–Cu–Li alloy welds can be prevented by quenching. As a result, the welds have about the same strength as the base metal, but their levels are significantly reduced.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the fracture behaviour of heat‐treated Al–Cu–Li alloy laser welds under low‐cycle fatigue loading

Маликов

Karpov

Orishich

2020

Fatigue Fract Eng Mat Struct

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The paper presents the results of the studies of the effect of temperature on the fracture behaviour of Al-Cu-Li alloy laser welds under low-cycle fatigue loading. The mechanical properties and the microstructure of the welded joints without and after postweld heat treatment (PWHT) were investigated. The tensile strength and the low-cycle fatigue resistance of the welded joints were studied at various test temperatures (20 C, 85 C and − 60 C). It was been found that heating up to 85 C and cooling down to −60 C reduced the maximum number of loading cycles of the welded joints after PWHT by 1.5-2.0 times compared with that at a test temperature of 20 C. K E Y W O R D Saluminium-lithium alloy, fatigue strength, heat treatment, laser welding, microstructure, tensile strength

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Study of the structure and phase composition of laser welded joints of Al-Cu-Li alloy under different heat treatment conditions

Маликов

Булина

Шарафутдинов

et al. 2019

Int J Adv Manuf Technol

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Laser welding of the high-strength Al–Cu–Li alloy

Cited by 16 publications

References 29 publications

Submerged Dissimilar Friction Stir Welding of AA6061 and AA7075 Aluminum Alloys: Microstructure Characterization and Mechanical Property

Submerged Dissimilar Friction Stir Welding of AA6061 and AA7075 Aluminum Alloys: Microstructure Characterization and Mechanical Property

Effect of temperature on the fracture behaviour of heat‐treated Al–Cu–Li alloy laser welds under low‐cycle fatigue loading

Study of the structure and phase composition of laser welded joints of Al-Cu-Li alloy under different heat treatment conditions

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