Relationship Between Microstructure, Strength, and Fracture in an Al-Zn-Mg Electron Beam Weld: Part II: Mechanical Characterization and Modeling

Puydt, Quentin; Flouriot, Sylvain; Ringeval, S.; Geuser, F. de; Estevez, Rafaël; Parry, Guillaume; Deschamps, A.

doi:10.1007/s11661-014-2567-8

Cited by 23 publications

(8 citation statements)

References 56 publications

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“…It will serve as a basis for the mechanical model that will be presented in the companion paper. [23] The study of microstructures in fusion welded precipitation hardening aluminum alloys is a well-chartered area. Particularly, the evolution of precipitate microstructures in the HAZ during welding and during postwelding heat treatments is now well understood both in terms of characterization and modeling in the most important Al alloy families and in particular in Al-Mg-Si based alloys [24][25][26] and in medium strength Al-Zn-Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

Relationship Between Microstructure, Strength, and Fracture in an Al-Zn-Mg Electron Beam Weld: Part I: Microstructure Characterization

Puydt

Flouriot

Ringeval

et al. 2014

Metall Mater Trans A

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International audienceThis work presents a detailed, multiscale, spatially resolved study of the microstructure of an electron beam butt weld of the EN-AW 7020 (Al-Zn-Mg) alloy. Using a combination of optical, scanning and transmission electron microscopy, differential scanning calorimetry, and small-angle X-ray scattering, the distribution of phases in the different areas of the heat-affected zone and of the fusion zone is quantitatively characterized, for two different aging states: naturally aged after welding and artificially aged at 423 K (150 A degrees C). The heat-affected zone consists of regions experiencing different levels of precipitate dissolution and coarsening during welding as well as new precipitation during post-welding heat treatment (PWHT). The microstructure of the fusion zone is typical from a fast solidification process, with a strong solute segregation in the interdendritic zones. The precipitate distribution after PWHT follows this solute distribution, and the resulting hardness is much lower than the relatively homogeneous value in the base metal and the heat-affected zone

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Section: Introductionmentioning

confidence: 99%

Relationship Between Microstructure, Strength, and Fracture in an Al-Zn-Mg Electron Beam Weld: Part I: Microstructure Characterization

Puydt

Flouriot

Ringeval

et al. 2014

Metall Mater Trans A

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“…Aluminium alloys 7075 (Al–Zn–Mg) have been utilised in transport industries such as aerocraft, ship structure, and high-speed trains, owing to their lightweight, high specific strength, and good weldability [1, 2]. MIG and TIG welding are the main methods currently used for joining the aluminium alloys [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of welding wires on fatigue property of 7N01-T4 aluminium alloy joints

Liu

Wei

Long

et al. 2020

Science and Technology of Welding and Joining

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The effect of ER5356 and ER5087 welding wires on fatigue property of MIG-welded 7N01-T4 aluminium alloy joints was investigated. The microstructure of ER5087 welded joint is similar to that of ER5356 joint. However, the fusion zone of the welding joint with ER5087 has a smaller grain size than that of the joint with ER5356. The fatigue strength of joints welded with ER5356 and ER5087 is 105.9 and 103.2 MPa at 10 7 cycles. During the fatigue process, the crack initiation for joints welded using ER5087 is due to porosity while for ER5356 is due to microcracks from eutectic melting in the heat-affected zone.

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“…Al-Zn-Mg alloy (7000 series aluminum alloy) is widely used in aerospace, high-speed railway and other fields due to its low density, high strength, high specific strength and good weldability [1,2]. 7N01 aluminum alloy is one of the representative alloys of 7000 series aluminum alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of different surface conditions on fatigue properties of 7N01 aluminum alloy and the behavioral mechanism of crack of the alloy under alternating load

Chen

Cai

Deng

et al. 2020

Mater. Res. Express

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In this paper, the surface of 7N01 aluminum alloy profile is sandblasted or electropolished. The influence of different surface conditions on its conditional fatigue strength and fatigue mechanism under the alternating load after prefabricated short crack are studied. Results show that the 7N01 aluminum alloy with sandblasting treatment has formed a work hardened layer and its fatigue strength is increased by 42.9% comparing with the original surface specimens. The fatigue strength of the 7N01 aluminum alloy after electropolishing is almost unchanged compared with the original specimen. The fatigue behavior of the 7N01 aluminum alloy after prefabricated side straight through the notch deviated from the theoretical smooth specimen law and long crack propagation law in which is a 'shortage effect'. When the notch size is smaller than the transition crack size a 0 , the fatigue limit of the notched specimen is lower than the fatigue limit of the smooth specimen. When the notch size is larger than the transition crack size, the fatigue limit of the long-notched specimen is still lower than that predicted by linear elastic fracture mechanics. Due to the 'short notch effect', the effective notch propagation threshold ΔK eff.th of the long crack is 0.39 Mpa m 1/2 based on the effective notch propagation size a 0 eff of the alloy.

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Relationship Between Microstructure, Strength, and Fracture in an Al-Zn-Mg Electron Beam Weld: Part II: Mechanical Characterization and Modeling

Cited by 23 publications

References 56 publications

Relationship Between Microstructure, Strength, and Fracture in an Al-Zn-Mg Electron Beam Weld: Part I: Microstructure Characterization

Relationship Between Microstructure, Strength, and Fracture in an Al-Zn-Mg Electron Beam Weld: Part I: Microstructure Characterization

Effect of welding wires on fatigue property of 7N01-T4 aluminium alloy joints

Effect of different surface conditions on fatigue properties of 7N01 aluminum alloy and the behavioral mechanism of crack of the alloy under alternating load

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