Effect of hot isostatic pressing on the cryogenic mechanical properties of CrCoNi medium entropy alloy processed by direct energy deposition

Tran, Minh Tien; Nguyen, Tri H.; Kim, Dong Kyu; Woo, Wanchuck; Choi, Shi‐Hoon; Lee, Ho Won; Wang, Huai; Kim, Jeong Gyun

doi:10.1016/j.msea.2021.142110

Materials Science and Engineering: A

2021

DOI: 10.1016/j.msea.2021.142110

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Effect of hot isostatic pressing on the cryogenic mechanical properties of CrCoNi medium entropy alloy processed by direct energy deposition

Minh Tien Tran

Tri H. Nguyen

Dong Kyu Kim

et al.

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Cited by 21 publications

References 41 publications

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In situ Alloyed Medium Entropy Alloy Fabricated by Laser Powder Bed Fusion: Microstructure and Cryogenic Performance

Jia

et al. 2022

Adv Eng Mater

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An investigation is conducted into the feasibility to produce in situ alloyed medium entropy alloy containing four principal elements by laser powder bed fusion of the blended elemental powders. The effect of scan strategy, layer thickness, and laser power on in situ alloying is examined. It is revealed that the melting of Cr particles could be enhanced by increasing the remelting times of each building layer through the re‐scan strategy or reducing the powder layer thickness and by increasing the melting pool depth via large laser power. Besides, the combination of elemental uniformity and the low porosity in the printed alloy can be achieved. The accuracy of the nominal composition in the as‐printed sample could be ensured by the large remelting times combined with middle laser power, while an excessively large laser power could cause the loss of Cr element. Based on the high repetitive remelting process, the mechanism of pores elimination during in situ alloying is discussed. After the optimization, the as‐printed Fe60Co15Ni15Cr10 alloy fabricates with the re‐scan strategy or high laser power shows a tensile strength of ≈1140 MPa and an elongation of ≈0.39 under cryogenic loading. The as‐printed alloy overcomes the strength–ductility trade‐off at cryogenic temperature through the transformation‐induced plasticity.

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In situ Alloyed Medium Entropy Alloy Fabricated by Laser Powder Bed Fusion: Microstructure and Cryogenic Performance

Jia

et al. 2022

Adv Eng Mater

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Quality evaluation modeling of a DED-processed metallic deposition based on ResNet-50 with few training data

Park,

Kang,

Choi

et al. 2024

J Intell Manuf

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Post-Process Treatments for Additive-Manufactured Metallic Structures: A Comprehensive Review

Pillay

Ning

2023

J. of Materi Eng and Perform

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Effect of hot isostatic pressing on the cryogenic mechanical properties of CrCoNi medium entropy alloy processed by direct energy deposition

Cited by 21 publications

References 41 publications

In situ Alloyed Medium Entropy Alloy Fabricated by Laser Powder Bed Fusion: Microstructure and Cryogenic Performance

In situ Alloyed Medium Entropy Alloy Fabricated by Laser Powder Bed Fusion: Microstructure and Cryogenic Performance

Quality evaluation modeling of a DED-processed metallic deposition based on ResNet-50 with few training data

Post-Process Treatments for Additive-Manufactured Metallic Structures: A Comprehensive Review

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