Fatigue and dynamic aging behavior of a high strength Al-5024 alloy fabricated by laser powder bed fusion additive manufacturing

He, Peidong; Webster, Richard F.; Yakubov, Vladislav; Kong, Hui; Yang, Qin; Huang, Shuke; Ferry, Michael; Kruzic, Jamie J.; Li, Xiao Peng

doi:10.1016/j.actamat.2021.117312

Cited by 75 publications

(14 citation statements)

References 73 publications

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“…Additionally, many coarse precipitated phases were distributed near the grain boundary. According to the literature [19,26,46,47], cracks may easily nucleate at these sites and propagate along the grain boundary. The extensive presence of continuous coarse precipitated phases was important in premature fracture of specimens, which usually manifested as a brittle fracture mode.…”

Section: Effect Of Microstructure On Hcf Deformation Of 211zx Alloymentioning

confidence: 99%

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Zhong

Huang

Chen

et al. 2022

Metals

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In the present paper, the high cycle fatigue (HCF) of a novel 211Z.X aluminum alloy with high strength was studied under hot-rolling and as-cast states at room temperature. The effects of microstructure and distribution of precipitated phases and impurities on the mechanical properties, HCF performances, fatigue microcrack initiation, and propagation behavior of the 211Z.X alloy were studied by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The HCF S–N curves, P–S–N curves and Goodman fatigue diagrams of 211Z.X alloy consisting of two microstructures were drawn. The results suggested that the fine and dispersive distribution of the second phases improved the strength of the alloy. The formation of short-bar and spherical precipitates promoted coordinated deformation of the alloy. This promoted higher microcrack initiation resistance of 211Z.X alloy with a hot rolling state than in the cast state. As a result, the HCF properties of the hot-rolling alloy were better than those of the cast alloy. In sum, these results look promising for future reliable design of engineering structures and application of new aluminum alloys.

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Section: Effect Of Microstructure On Hcf Deformation Of 211zx Alloymentioning

confidence: 99%

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Zhong

Huang

Chen

et al. 2022

Metals

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“…It has been shown that inside these melt pools, localized melting and solidification can enable the tailoring of the microstructure (e.g., grain size, precipitation, bimodal structure, etc.) of the fabricated metals and alloys by controlling the AM processing parameters and can also decrease the composition segregation in fabricated metal components [90][91][92]. Due to the relationship between the global and local heat flux during the AM process and grain growth, crystallographic texture of AM MPEAs can also be readily designed through controlling the power, hatch space, and scanning strategy to manipulate the solidification process within each melt pool.…”

Section: Localized Melting and Solidification For Microstructure Tail...mentioning

confidence: 99%

Review: Multi-principal element alloys by additive manufacturing

Ferry

Kruzic

et al. 2022

J Mater Sci

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Multi-principal element alloys (MPEAs) have attracted rapidly growing attention from both research institutions and industry due to their unique microstructures and outstanding physical and chemical properties. However, the fabrication of MPEAs with desired microstructures and properties using conventional manufacturing techniques (e.g., casting) is still challenging. With the recent emergence of additive manufacturing (AM) techniques, the fabrication of MPEAs with locally tailorable microstructures and excellent mechanical properties has become possible. Therefore, it is of paramount importance to understand the key aspects of the AM processes that influence the microstructural features of AM fabricated MPEAs including porosity, anisotropy, and heterogeneity, as well as the corresponding impact on the properties. As such, this review will first present the state-of-the-art in existing AM techniques to process MPEAs. This is followed by a discussion of the microstructural features, mechanisms of microstructural evolution, and the mechanical properties of the AM fabricated MPEAs. Finally, the current challenges and future research directions are summarized with the aim to promote the further development and implementation of AM for processing MPEAs for future industrial applications.

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“…[ 39 ] Furthermore, the layer‐by‐layer processing causes thermal cycling of the previously fabricated layers, and the directional solidification promotes grain growth in the direction of the heat source, encouraging elongated grain structures and anisotropic mechanical properties. [ 40–44 ]…”

Section: Intermetallic Compounds For Additive Manufacturingmentioning

confidence: 99%

“…In LPBF‐fabricated samples, [ 79,80 ] a small amount of fine O‐phase was present at melt pool boundaries, a part of the melt pool that is known to undergo relatively slow solidification due to persistent heat input from melt pool center. [ 40 ] After the LPBF‐fabricated sample was solution treated at 950 °C and aged at 700 °C for 6 h, acicular O‐phase and α 2 particles were present in the B2/β grains, with α 2 also present at B2 grain boundaries. [ 79 ] For the LDED‐fabricated material, solution treatment at 960 and 750 °C aging for 3 h caused precipitation of a greater amount of fine O‐phase.…”

Section: Intermetallic Compounds For Additive Manufacturingmentioning

confidence: 99%

“…[39] Furthermore, the layerby-layer processing causes thermal cycling of the previously fabricated layers, and the directional solidification promotes grain growth in the direction of the heat source, encouraging elongated grain structures and anisotropic mechanical properties. [40][41][42][43][44] Accordingly, the following subsections will examine how chemical composition and processing conditions affect the microstructure and crack formation in ICs, and how those factors can be controlled to create dense, crack-free IC components with desired microstructures.…”

Section: Processing Solidification Defects and Microstructure Of Addi...mentioning

confidence: 99%

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Heat‐Resistant Intermetallic Compounds and Ceramic Dispersion Alloys for Additive Manufacturing: A Review

Yakubov

Kruzic

2022

Adv Eng Mater

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Many industries such as aerospace, power generation, and ground transportation demand structural materials with high specific strength at elevated temperatures. Up until now, many types of heat‐resistant materials including Ni‐based superalloys, intermetallic compounds, and dispersion‐strengthened alloys have been developed for specific applications in these industries. Moreover, with the recent development of additive manufacturing techniques, these industries can now benefit from the rapid prototyping abilities, geometric freedom, and increased mechanical properties that can be achieved through various additive manufacturing processes. With this in mind, the progress made in additive manufacturing of heat‐resistant intermetallic compounds and ceramic dispersion alloys is herein examined. A brief introduction is provided on the target industries, applications, and the compositions of heat‐resistant alloys of current research interest. Then, recent research on heat‐resistant intermetallic compounds and ceramic dispersion alloys fabricated by additive manufacturing processes such as laser powder bed fusion, laser direct energy deposition, and electron‐beam powder bed fusion are reviewed with information provided on microstructure, processing parameters, strengthening mechanisms, and mechanical properties. Finally, an outlook is provided with future research suggestions.

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Fatigue and dynamic aging behavior of a high strength Al-5024 alloy fabricated by laser powder bed fusion additive manufacturing

Cited by 75 publications

References 73 publications

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Review: Multi-principal element alloys by additive manufacturing

Heat‐Resistant Intermetallic Compounds and Ceramic Dispersion Alloys for Additive Manufacturing: A Review

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