Microstructure distribution and orientation-structure topology optimization of metallic materials for laser additive manufacturing

Zhang, Qi; Ma, Yue; Liu, Yanming; Zhao, Yaohua; Yan, Lishan; Xian-jiu, Chen; Ouyang, Jinhua

doi:10.1007/s10999-022-09630-9

Cited by 1 publication

(1 citation statement)

References 30 publications

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“…A solid bonding is a must for hardness-enhancing or corrosion-inhibiting layers, as opposed to the case when a 3D object is created that later needs to be detached. For the laser cladding directed energy deposition (DED) additive manufacturing process, the hardness and the microstructure properties of the interface depend on the physical and chemical properties of both the applied alloy and the parameters of the cladding process, such as laser power, defocusing distance, scanning speed, powder feed rate and direction as well as shielding gas flow rate [9][10][11][12][13][14][15]. These parameters also play an important role in other techniques, like additive manufacturing of functionally graded structures [16] or large-scale additive manufacturing [17].…”

Section: Introductionmentioning

confidence: 99%

Composition Profiles at the Metal Substrate–Deposit Interface Produced in Laser-Assisted Additive Manufacturing Processes

Péter,

Kugler,

Kolonits

et al. 2024

Materials

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The cross-section of various substrate–deposit metal pairs obtained with a laser-assisted additive manufacturing process has been studied by observing the composition profile with energy-dispersive spectroscopy (EDS). The EDS composition profiles observed with a sufficiently high data acquisition time revealed that the composition profile is asymmetric. By scanning toward the growth direction, a sudden composition variation was observed, which was followed by a slow decay. The character of the composition profile was the same for a number of substrate–deposit pairs, and similar trends were found in various earlier publications as well. A mathematical model for the composition variation is suggested based on the assumption that a spontaneous homogenization process takes place in the intermixing (dilution) zone of the remelted top layer of the substrate. The equation obtained makes it possible to quantitatively describe the composition profile of each component that exhibits a concentration difference between the substrate and the deposit, provided that the mole fraction difference much exceeds the scattering of the data measured. The suggested model has also been applied successfully to composition profiles published in other works, hence exhibiting general relevance. Since the variation in some physical parameters (such as hardness) along the growth direction has been reported to follow the same pattern, it is assumed that the root cause in these cases may also be the composition variation.

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