Realizing Crack Inhibition of Haynes 230 Alloy during Laser Powder Bed Fusion by Grain Refinement under Decreased Energy Density

Gong, Delong; An, Qi; Chen, Run; Wang, Shuai; Huang, Lujun; Cui, Lihua; Lu, Weihang; Geng, Lin

doi:10.1016/j.amf.2024.200139

Additive Manufacturing Frontiers

2024

DOI: 10.1016/j.amf.2024.200139

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Realizing Crack Inhibition of Haynes 230 Alloy during Laser Powder Bed Fusion by Grain Refinement under Decreased Energy Density

Delong Gong,

Qi An,

Run Chen

et al.

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Cited by 3 publications

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Additively manufactured crack-free nickel-based superalloy with synergistic strength and plasticity via grain refinement and striped oxides inhibition

Xi,

Lin,

et al. 2025

Composites Part B: Engineering

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Additively manufactured crack-free nickel-based superalloy with synergistic strength and plasticity via grain refinement and striped oxides inhibition

Xi,

Lin,

et al. 2025

Composites Part B: Engineering

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A computational fluid dynamics-based girth welding model for large-diameter pipeline to reveal vertical weld formation mechanism

Yun,

Li,

et al. 2024

Physics of Fluids

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Welding quality significantly impacts the safety of large-diameter, long-distance pipelines. The molten pool flow, influenced by gravity, results in variations in the girth weld seam at different circumferential orientations. A three-dimensional transient computational fluid dynamics model was developed to study the multi-layer, multi-pass welding process of X80M pipeline, incorporating arc heat, droplet heat, gravity, and fluid flow in the molten pool. The model also simulates dual-torch automatic welding to examine heat transfer and flow characteristics. Notably, it reveals the morphological evolution of the girth weld seam from the 2 to 3 o'clock positions during continuous welding, an area lacking prior research. The results, validated by experiments, show good agreement between the simulation and thermal cycle curves. The weld pool solidifies from the sides toward the center, creating a concave shape due to downward metal flow, with dual-torch welding intensifying this effect. The second torch increases the concavity of filler layers, with depths rising by 21.81% and 32.20%. These findings offer new insights into pipeline girth welding.

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A customised novel hybrid post-treatment process achieved excellent mechanical properties in additively manufactured Haynes 230 alloy

Liu,

Meng,

Xiao

et al. 2024

Virtual and Physical Prototyping

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Realizing Crack Inhibition of Haynes 230 Alloy during Laser Powder Bed Fusion by Grain Refinement under Decreased Energy Density

Cited by 3 publications

References 46 publications

Additively manufactured crack-free nickel-based superalloy with synergistic strength and plasticity via grain refinement and striped oxides inhibition

Additively manufactured crack-free nickel-based superalloy with synergistic strength and plasticity via grain refinement and striped oxides inhibition

A computational fluid dynamics-based girth welding model for large-diameter pipeline to reveal vertical weld formation mechanism

A customised novel hybrid post-treatment process achieved excellent mechanical properties in additively manufactured Haynes 230 alloy

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