Influence of Grain Refinement and Microstructure on Fatigue Behavior for Solid-State Additively Manufactured Al-Zn-Mg-Cu Alloy

Avery, D. Z.; Phillips, B.J.; Mason, C. J. T.; Palermo, Michele; Williams, M. B.; Cleek, C.; Rodriguez, Omar; Allison, P. G.; Jordon, J.B.

doi:10.1007/s11661-020-05746-9

Cited by 71 publications

(33 citation statements)

References 52 publications

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“…The refined microstructures were correlated with the property recoveries/improvements in these deposited alloys; or, in other words, the superalloys were responsive to Hall-Petch-type strengthening mechanisms [17,18]. Similar grain refinement was also reported in depositions of Al alloys [9,10,19,20]. In contrast to the Ni-based superalloys, the yield strength of the Al was not as responsive to the grain refinement.…”

Section: Introductionmentioning

confidence: 66%

Microstructure Development in Additive Friction Stir-Deposited Cu

Priedeman

Phillips

Lopez

et al. 2020

Metals

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This work details the additive friction stir-deposition (AFS-D) of copper and evaluation of its microstructure evolution and hardness. During deposition, a surface oxide is formed on the deposit exterior. A very fine porosity is formed at the substrate–deposit interface. The deposit (four layers of 1 mm nominal height) is otherwise fully dense. The grains appear to have recrystallized throughout the deposit with varying levels of refinement. The prevalence of twinning was found to be dependent upon the grain size, with larger local grain sizes having a higher number of twins. Vickers hardness measurements reveal that the deposit is softer than the starting feedstock. This result indicates that grain refinement and/or higher twin densities do not replace work hardening contributions to strengthen Cu processed by additive friction stir-deposition.

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Section: Introductionmentioning

confidence: 66%

Microstructure Development in Additive Friction Stir-Deposited Cu

Priedeman

Phillips

Lopez

et al. 2020

Metals

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“…To compare, AFSD characteristically leads to refined, equiaxed microstructures due to its thermomechanical processing nature [35,36,49]. Because of the friction stir principle, the deposited material is severely and rapidly deformed with the peak temperature above half of the melting temperature [50].…”

Section: Microstructurementioning

confidence: 99%

“…For example, feedstock made from aluminum alloys (e.g. 2xxx [36,55], 6xxx [31], and 7xxx [49,56]) with a coarse microstructure (grain size ∼ 100-200 μm) may have their grain size reduced to 1-5 μm after AFSD. Figure 2(b) shows an example for AFSD of AA2024, with a comparison of the microstructure before and after printing.…”

Section: Microstructurementioning

confidence: 99%

“…The most promising market for AFSD thus lies in where excellent mechanical properties are highly desired and minimal post-processing heat treatment is preferred. In terms of materials, AFSD has particular advantages in processing and manufacturing of high-strength aluminum alloys that suffer from hot cracking issues in fusion-based additive manufacturing [36,49,55,56].…”

Section: Where Is the Market?mentioning

confidence: 99%

“…When printing two-phase alloys, the resultant fraction and spatial distribution of the secondary phase are sensitively dependent on the thermal and deformation history [77]. Starting from fully-aged, high-strength Al alloys, for example, AFSD can profoundly change the precipitate attributes, typically causing a decrease in strength and an increase in ductility [49]. The underlying phase and microstructure evolution are complex, possibly including multiple mechanisms that occur sequentially or simultaneously, such as dynamic recovery, dynamic recrystallization, particle stimulated nucleation, precipitate dissolution, dynamic precipitation, static precipitation, and particle coarsening [78][79][80].…”

Section: On the Microscopic Levelmentioning

confidence: 99%

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Additive friction stir deposition: a deformation processing route to metal additive manufacturing

Mishra

2020

Materials Research Letters

103

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As the forging counterpart of fusion-based additive processes, additive friction stir deposition offers a solid-state deformation processing route to metal additive manufacturing, in which every voxel of the feed material undergoes severe plastic deformation at elevated temperatures. In this perspective article, we outline its key advantages, e.g. rendering fully-dense material in the as-printed state with fine, equiaxed microstructures, identify its niche engineering uses, and point out future research needs in process physics and materials innovation. We argue that additive friction stir deposition will evolve into a major additive manufacturing solution for industries that require high load-bearing capacity with minimal post-processing. IMPACT STATEMENT This paper delineates additive friction stir deposition, which offers a solid-state deformation processing route to metal additive manufacturing and renders fully-dense material with fine, equiaxed microstructures in the as-printed state.

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Mechanical Properties of Additive Friction Stir Deposits

Avery,

Perry

2024

Solid‐State Metal Additive Manufacturing

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Influence of Grain Refinement and Microstructure on Fatigue Behavior for Solid-State Additively Manufactured Al-Zn-Mg-Cu Alloy

Cited by 71 publications

References 52 publications

Microstructure Development in Additive Friction Stir-Deposited Cu

Microstructure Development in Additive Friction Stir-Deposited Cu

Additive friction stir deposition: a deformation processing route to metal additive manufacturing

Mechanical Properties of Additive Friction Stir Deposits

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