Microstructures and Fatigue Properties of High-Strength Low-Alloy Steel Prepared through Submerged-Arc Additive Manufacturing

Hu, Meijuan; Ji, Lingkang; Chi, Qiang; Ma, Qianli

doi:10.3390/ma15238610

Cited by 3 publications

(2 citation statements)

References 21 publications

(19 reference statements)

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“…A clear anisotropy cannot be detected. However, for [20] the yield strength and elongation at break depend on the build-up direction. Only the tensile strength seems to be independent.…”

Section: Discussionmentioning

confidence: 99%

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Material Behavior of High-Strength Low-Alloy Steel (HSLA) WAAM Walls in Construction

Jahns

Unglaub

Müller

et al. 2023

Metals

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Additive manufacturing with steel offers new opportunities for the construction sector. In particular, direct energy deposition (DED) processes such as Wire Arc Additive Manufacturing (WAAM or DED-Arc), are able to create large structures with a high degree of geometric freedom, like force-flow-optimized steel nodes and frameworks, as well as truss structures. By using high-strength steel, manufacturing times can be shortened because less material has to be applied. In order to enable the usage of WAAM components in the construction industry, profound knowledge of the material behavior is necessary. Based on reliable process parameters, extensive experimental and numerical investigations are carried out to characterize the influence of layer orientation and overhang angle on the mechanical parameters of WAAM high-strength low-alloy steel (HSLA) walls. The results have been compared to HSLA steel sheet material. It is shown that comparable characteristics exist for Young’s modulus E, yield strength Rp,0.2 and tensile strength Rm with regard to civil engineering applications. The influence of the loading direction on the material level is similar. Only the yield strength shows a slight dependence on the layer orientation for WAAM walls (difference 4.5%). The overhang angle has no influence on the material parameters.

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“…A clear anisotropy cannot be detected. However, for [20] the yield strength and elongation at break depend on the build-up direction. Only the tensile strength seems to be independent.…”

Section: Discussionmentioning

confidence: 99%

“…Ref. [20] explores the use of Submerged Arc Additive Manufacturing (SAAM) for manufacturing HSLA steel T-branch pipes. The material parameters in the horizontal and vertical direction of deposit (0 • , 90 • were studied on cut-out specimens.…”

Section: Introductionmentioning

confidence: 99%

Material Behavior of High-Strength Low-Alloy Steel (HSLA) WAAM Walls in Construction

Jahns

Unglaub

Müller

et al. 2023

Metals

View full text Add to dashboard Cite

show abstract

Recent research progress on additive manufacturing of high-strength low-alloy steels: Focusing on the processing parameters, microstructures and properties

Cheng

Luo

2023

Materials Today Communications

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Effect of Interlayer Temperature on Microstructure and Properties of High-Strength Low-Alloy Steel Manufactured Using Submerged-Arc Additive Manufacturing (SAAM)

Hu,

Chi,

et al. 2024

Materials

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Controlled interlayer temperature has a profound impact on both the microstructure and mechanical properties of the deposited components. In this study, thin-walled structures made of high-strength low-alloy steel were fabricated using the submerged-arc additive manufacturing process. The effects of varying temperature on the microstructure and mechanical properties of the components were studied. The results showed that the cooling rate within T8/5 decreased as the interlayer temperature increased, which caused the microstructure to transition from a fine-grained structure dominated by bainitic ferrite and granular bainite to a coarse-grained structure dominated by polygonal ferrite. The measurement of mechanical properties showed that due to the influence of the fine-grained structure, the components with low interlayer temperatures exhibit excellent hardness, high strength, and outstanding ductility and toughness. Furthermore, a faster cooling rate disrupts the stability of carbon diffusion, resulting in the development of increased quantities of residual austenitic films within the components with controlled low interlayer temperatures. This augmentation in residual austenite films strengthens the components’ ductility and toughness, enabling the deposited components to exhibit exceptional impact toughness in low-temperature environments.

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Microstructures and Fatigue Properties of High-Strength Low-Alloy Steel Prepared through Submerged-Arc Additive Manufacturing

Cited by 3 publications

References 21 publications

Material Behavior of High-Strength Low-Alloy Steel (HSLA) WAAM Walls in Construction

Material Behavior of High-Strength Low-Alloy Steel (HSLA) WAAM Walls in Construction

Recent research progress on additive manufacturing of high-strength low-alloy steels: Focusing on the processing parameters, microstructures and properties

Effect of Interlayer Temperature on Microstructure and Properties of High-Strength Low-Alloy Steel Manufactured Using Submerged-Arc Additive Manufacturing (SAAM)

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