Multiple Preheating Processes for Suppressing Liquefaction Cracks in IN738LC Superalloy Fabricated by Electron Beam Powder Bed Fusion (EB-PBF) DOI Open Access
Li Yang,

Hongyu Long,

Bo Wei

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(22), P. 5667 - 5667

Published: Nov. 20, 2024

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

Language: Английский

Shear banding mediated fracture mechanisms in additively manufactured IN738 superalloys under low-strain-rate loading DOI

Xiaofeng Dang,

Yao Li, Jie Zheng

et al.

International Journal of Plasticity, Journal Year: 2025, Volume and Issue: 188, P. 104296 - 104296

Published: March 12, 2025

Language: Английский

Citations

2
Diffuse reflectance spectroscopy for the qualification of powder blends for additive manufacturing DOI Creative Commons
Konrad Gruber,

Labeed Ahmad,

Mohammed Farag

et al.

Powder Technology, Journal Year: 2025, Volume and Issue: unknown, P. 120652 - 120652

Published: Jan. 1, 2025

Language: Английский

Citations

1
Static and Fatigue Properties of Rhenium-Alloyed Inconel 718 Produced by Powder Bed Fusion Additive Manufacturing DOI Open Access
Mariusz Frankiewicz, Michał Karoluk, Robert Dziedzic

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(3), P. 692 - 692

Published: Feb. 5, 2025

Inconel 718 (In718) is the most widely used nickel-based alloy in additive manufacturing due to its favorable processability. However, In718’s high-temperature performance not suited for demanding applications aerospace industry. Therefore, this study, powder was coated with 3% wt. rhenium (In718-Re) using AM’s situ alloying capabilities improve properties. The proposed alloy’s mechanical evaluated, focusing on effects of post-process heat treatment and hot isostatic pressing following laser-based bed fusion metals (PBF-LB/M) processing. Static tensile tests conducted at room temperature elevated temperatures (650 °C 760 °C) demonstrated that has comparable strength pure In718 according ASTM F3055-14a—an ultimate 1247 MPa, yield 909 almost 2× higher elongation 23.8%. Fatigue indicated a fatigue limit below 400 MPa 107 cycles. Fractographic analysis revealed primarily impacted by lack defects inherent PBF-LB/M process, highlighting need optimized preparation processing parameters minimize defect formation. While addition shows limited benefits 718, study underscores potential through surface modification as flexible method incorporating high-melting-point elements into alloys tailored design manufacturing.

Language: Английский

Citations

1
Microstructural evolution and precipitation kinetics of carbides in L-PBF processed Inconel 718 during long-term homogenization DOI
Vikrant Saumitra

Materials Today Communications, Journal Year: 2024, Volume and Issue: unknown, P. 111192 - 111192

Published: Dec. 1, 2024

Language: Английский

Citations

3
Powder Characterization and Material Properties of 18Ni300 Recycled PBF-LB/M Scrap by Ultrasonic Atomization DOI
Agnieszka Łagoda, Andrzej Pawlak, Andrzej Kurek

et al.

International Journal of Precision Engineering and Manufacturing-Green Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Language: Английский

Citations

0
Multiple Preheating Processes for Suppressing Liquefaction Cracks in IN738LC Superalloy Fabricated by Electron Beam Powder Bed Fusion (EB-PBF) DOI Open Access
Li Yang,

Hongyu Long,

Bo Wei

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(22), P. 5667 - 5667

Published: Nov. 20, 2024

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

Language: Английский

Citations

2