A strong, ductile, high-entropy FeCoCrNi alloy with fine grains fabricated via additive manufacturing and a single cold deformation and annealing cycle

Lin, Danyang; Xu, Longhua; Jing, Hongyang; Zhao, Lei; Zhang, Yankun; Li, Huan

doi:10.1016/j.addma.2020.101591

Cited by 16 publications

(12 citation statements)

References 38 publications

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“…The quinary CoCrFeMnNi produced by PBF exhibited a yield strength of 510 MPa, an ultimate strength of 610 MPa, and an elongation of 36% [142]. In contrast, quaternary MPEAs CoCrFeNi fabricated by using the same AM technique had a yield strength, an ultimate tensile strength and an elongation of 600 MPa, 745 MPa and 32%, respectively [140].…”

Section: Mechanical Behavior Of Am Mpeasmentioning

confidence: 98%

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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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Section: Mechanical Behavior Of Am Mpeasmentioning

confidence: 98%

“…Hardness of AM FCC MPEAs such as CoCrFeNi, CoCrFeNiMn, and Al 0.5 CoCrFeNi vary from 200 to 400 HV [92,105,140]. Introducing BCC phases or secondary particles by adding Al, C, B and Ti can generally increase the hardness in AM MPEAs (Fig.…”

Section: Mechanical Behavior Of Am Mpeasmentioning

confidence: 99%

Review: Multi-principal element alloys by additive manufacturing

Ferry

Kruzic

et al. 2022

J Mater Sci

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“…This resulted in a greater storage of strain energy, promoting the subsequent grain refinement upon annealing, thus producing smaller grains with varying orientations, as depicted by Figure 1e,f. [104] In a more recent annealing treatment of SLM-fabricated NbMoTaTiNi refractory HEA, the dendritic arms were observed to fuse with increasing annealing temperature and formed cellular crystals at 1300 °C. A three-phase structure consisting of a disordered BCC NbMoTa matrix, trigonal X B disorderedordered transition phase, and ordered (B2) TiNi phase was observed.…”

Section: Heat Treatmentmentioning

confidence: 98%

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

Bajaj,

Feng,

et al. 2023

Adv Eng Mater

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The 3D‐printing of high‐entropy alloys (HEAs) is capable of enhancing the design and manufacturing flexibilities for the novel materials. Owing to the rapid solidification, the 3D‐printed HEAs exhibit markedly different microstructures than their conventionally‐manufactured equivalents, leading to peculiar mechanical properties. Many additively‐manufactured HEAs also break down the strength‐ductility trade‐off dilemma. Novel dynamics regarding the simultaneous and sequential nature of deformation mechanisms are emerging through recent intensive research on these materials. Herein the deformation behavior of 3D‐printed HEAs is reviewed and explained on the basis of the latest advances in this area. A comprehensive picture regarding the role of cellular dislocation networks, twinning‐induced plasticity (TWIP), and transformation‐induced plasticity (TRIP) in the monotonic and cyclic deformation of 3D‐printed HEAs is presented. Special emphasis is placed on fatigue characteristics due to the enormous interest in this burgeoning area. The effect of post‐fabrication thermomechanical processing on plasticity is discussed along with the microstructural evolution in the 3D‐printed HEAs. Several innovative developments that carry latent potential for further research are also deliberated in this review. Finally, the present understanding of the deformation behavior of 3D‐printed HEAs is summarized while gauging the future directions.This article is protected by copyright. All rights reserved.

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“…The fabrication of this HEA by LPBF can offer enhanced performance at high temperatures over the cast (or wrought) alloy thanks to the unique microstructure generated in LPBF. For example, Lin et al's study [43] showed the dense dislocation networks in the FeCoCrNi HEA (subset of the CrMnFeCoNi HEA) fabricated by LPBF increased the storage rate of 3 deformation energy significantly during deformation. Kim et al's study [44] demonstrates that the AM alloy can have excellent compressive properties at elevated temperatures in the range from 500-700 °C [44].…”

Section: Introductionmentioning

confidence: 99%