Effect of aging treatment on the microstructure, cracking type and crystallographic texture of IN939 fabricated by powder bed fusion-laser beam

Ozer, Seren; Doğu, Merve Nur; Ozdemirel, Ceren; Bilgin, Güney Mert; Gunes, Mert; Davut, Kemal; Gu, Hengfeng; Brabazon, Dermot

doi:10.1016/j.jmrt.2024.09.106

Journal of Materials Research and Technology

2024

DOI: 10.1016/j.jmrt.2024.09.106

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Effect of aging treatment on the microstructure, cracking type and crystallographic texture of IN939 fabricated by powder bed fusion-laser beam

Seren Ozer,

Merve Nur Doğu,

Ceren Ozdemirel

et al.

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Cited by 3 publications

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Recent advances in additive manufacturing technologies for Ni-Based Inconel superalloys – A comprehensive review

Shahwaz,

Nath,

Sen

2025

Journal of Alloys and Compounds

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Recent advances in additive manufacturing technologies for Ni-Based Inconel superalloys – A comprehensive review

Shahwaz,

Nath,

Sen

2025

Journal of Alloys and Compounds

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A comprehensive study of the effect of scanning strategy on IN939 fabricated by powder bed fusion-laser beam

Doğu,

Ozer,

Yalçın

et al. 2024

Journal of Materials Research and Technology

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Multiple Preheating Processes for Suppressing Liquefaction Cracks in IN738LC Superalloy Fabricated by Electron Beam Powder Bed Fusion (EB-PBF)

Li,

Long,

Wei

et al. 2024

Materials

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In additive manufacturing, controlling hot cracking in non-weldable nickel-based superalloys poses a significant challenge for forming complex components. This study introduces a multiple preheating process for the forming surface in electron beam powder bed fusion (EB-PBF), employing a dual-band infrared surface temperature measurement technique instead of the conventional base plate thermocouple method. This new approach reduces the temperature drop during forming, decreasing surface cooling by 28.6% compared to traditional methods. Additionally, the precipitation of carbides and borides is reduced by 38.5% and 80.1%, respectively, lowering the sensitivity to liquefaction cracking. This technique enables crack-free forming at a lower powder bed preheating temperature (1000 °C), thereby improving the powder recycling rate by minimizing powder sintering. Microstructural analysis confirms that this method reduces low-melting eutectic formation and alleviates liquefaction cracking at high-angle grain boundaries caused by thermal cycling. Consequently, crack-free IN738 specimens with high-temperature durability were successfully achieved, providing a promising approach for the EB-PBF fabrication of crack-resistant IN738 components.

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Effect of aging treatment on the microstructure, cracking type and crystallographic texture of IN939 fabricated by powder bed fusion-laser beam

Cited by 3 publications

References 61 publications

Recent advances in additive manufacturing technologies for Ni-Based Inconel superalloys – A comprehensive review

Recent advances in additive manufacturing technologies for Ni-Based Inconel superalloys – A comprehensive review

A comprehensive study of the effect of scanning strategy on IN939 fabricated by powder bed fusion-laser beam

Multiple Preheating Processes for Suppressing Liquefaction Cracks in IN738LC Superalloy Fabricated by Electron Beam Powder Bed Fusion (EB-PBF)

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