Prediction of Primary Dendrite Arm Spacing in Pulsed Laser Surface Melted Single Crystal Superalloy

Ci, Shiwei; Liang, Jingjing; Li, Jinguo; Wang, Haiwei; Zhou, Yizhou; Sun, Xiaofeng; Zhang, Hongwei; Ding, Yutian; Zhou, Xin

doi:10.1007/s40195-020-01156-3

Cited by 8 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The parameters of the DLD process operation are integrated into the FEM, as in Table 1 [ 22 ]. The form of the model was decided by the parameters.…”

Section: Finite Element Model Methodologymentioning

confidence: 99%

See 1 more Smart Citation

Thermal and Mechanical Variation Analysis on Multi-Layer Thin Wall during Continuous Laser Deposition, Continuous Pulsed Laser Deposition, and Interval Pulsed Laser Deposition

Kong

Liang

et al. 2022

Materials

Self Cite

View full text Add to dashboard Cite

Direct laser deposition (DLD) is widely used in precision manufacturing, but the process parameters (e.g., laser power, scanning patterns) easily lead to changes in dimensional accuracy and structural properties. Many methods have been proposed to analyze the principle of distortion and residual stress generation, but it is difficult to evaluate the involvement of temperature and stress in the process of rapid melting and solidification. In this paper, a three-dimensional finite element model is established based on thermal–mechanical relationships in multilayer DLD. Differences in temperature and residual stress between continuous laser deposition (CLD) and pulsed laser deposition (PLD) are compared with the numerical model. To validate the relationship, the temperature and residual stress values obtained by numerical simulation are compared with the values obtained by the HIOKI-LR8431 temperature logger and the Pulstec μ-X360s X-ray diffraction (XRD) instrument. The results indicate that the temperature and residual stress of the deposition part can be evaluated by the proposed simulation model. The proposed PLD process, which includes continuous pulsed laser deposition (CPLD) and interval pulsed laser deposition (IPLD), were found more effective to improve the homogeneity of temperature and residual stress than the CLD process. This study is expected to be useful in the distortion control and microstructure consistency of multilayer deposited parts.

show abstract

“…The parameters of the DLD process operation are integrated into the FEM, as in Table 1 [ 22 ]. The form of the model was decided by the parameters.…”

Section: Finite Element Model Methodologymentioning

confidence: 99%

“…Han et al [ 21 ] established a single-track numerical model to obtain the temperature, velocity, and stress fields in pulsed laser deposition. Ci et al [ 22 ] predicted the primary dendritic arm spacing in a pulsed laser remelting process with a single-spot heating model.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Mechanical Variation Analysis on Multi-Layer Thin Wall during Continuous Laser Deposition, Continuous Pulsed Laser Deposition, and Interval Pulsed Laser Deposition

Kong

Liang

et al. 2022

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…To obtain the relationship between processing and microstructure in the actual DED-L process, powder feeding must be considered. In our previous study [20][21][22], a pulsed laser was applied successfully to additive manufacturing of the SX nickel-base superalloy. In addition to CET, the appropriate productivity (deposited height), component size and powder using efficiency of the DED-L process are also vital to actual SX fabrication by a laser process.…”

Section: Introductionmentioning

confidence: 99%

Optimizing process for pulsed laser additive manufacturing of nickel-based single crystal superalloy

Ci,

Liang,

et al. 2023

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

The relationship between pulsed laser processing parameters and epitaxial growth of alloy is essential to additive manufacturing technology in repairing and manufacturing nickel-based single crystal (SX) superalloys. In this paper, orthogonal experiments of Laser Direct Energy Deposition (DED-L) process have been designed to optimize the process for the epitaxial growth of the SX superalloy. The relationship between process parameters and epitaxial growth of SX superalloy is established in a radar map, which shows that low laser power, pulse width and powder feeding rate help epitaxial growth in the DED-L process. It is implied that increasing the powder feeding rate value in the process range decreases the epitaxial growth rate of the molten pool and increases manufacturing efficiency. The size of the cladding layer width is greatly influenced by laser power (reached 44%) and pulse width (reached 38%). The deposited heigh of the cladding layer is mainly influenced by pulse width (reached 45%) and powder feeding rate (reached 42%). The process parameters have a similar level (approximately 33%) of influence on the powder using efficiency.

show abstract

“…Although the properties of HEAs after thermo-mechanical treatments can meet demanders' expectations to a certain extent, it is still a great challenge to manufacture industrial components with complex structures [14,15]. In this instance, the additive manufacturing (AM) provides an effective solution to satisfy these requirements [16][17][18][19][20][21][22]. For example, Kaur et al reported that the AM reduces the cost and weight, and optimizes the geometries [17], while the additive manufactured metal components show huge advantages in the industrial fields especially the aerospace and biomedical fields [16][17][18][19][20][21]23].…”

Section: Introductionmentioning

confidence: 99%

“…In this instance, the additive manufacturing (AM) provides an effective solution to satisfy these requirements [16][17][18][19][20][21][22]. For example, Kaur et al reported that the AM reduces the cost and weight, and optimizes the geometries [17], while the additive manufactured metal components show huge advantages in the industrial fields especially the aerospace and biomedical fields [16][17][18][19][20][21]23]. Up to now, different AM technologies have been developed, such as selective laser melting (SLM) [24,25], laser solid forming (LSF) [26], electron beam selective melting (EBSM) [27,28], and electron beam freeform fabrication (EBF3) [29], to explore novel metal alloys with high performance.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Features and Mechanical Behaviors of Al0.5Cr0.8CoFeNi2.5V0.2 High-Entropy Alloys Fabricated by Selective Laser Melting Technique

Yao

Song

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

In this work, high strength and ductile Al 0.5 Cr 0.8 CoFeNi 2.5 V 0.2 high-entropy alloys (HEAs) were fabricated by the selective laser melting (SLM) technique. After orthogonal experiments, it was verified that a wide SLM processing parameter window can be used to produce crack-free samples for the investigated HEAs. All the printed HEA samples exhibit good densification higher than 98.3%. It was found that obvious epitaxial growth leads to the formation of the cylindrical and equiaxed ordered face-centered cubic (FCC) crystals, displaying the characteristics of sub-cylindrical and sub-cellular microstructures. The low-angle grain boundaries (LAGBs) prefer appearing around subgrain structures, while the high-angle grain boundaries (HAGBs) tend to form around coarse grains. Two HEA samples with high and low apparent densities were selected to observe their mechanical properties, which exhibit Vickers hardness higher than 263 HV and do not fail during compression. With increasing densification, the strength gradually rises. According to the engineering stress-strain curves during compression, the yield strength is higher than 530 MPa, while the strength near 40% engineering strain is larger than 1840 MPa. During deformation, a large density of dislocations becomes popular within subgrain structures together with the pre-existing dislocations from rapid solidification, leading to the formation of planar and cross slip bands. Within coarse cylindrical crystals, some deformation twins are also induced together with the appearance of a distinct copper-type texture during deformation. As a result, the as-printed samples display better mechanical properties than the as-cast counterpart. The present studies provide a very good HEA candidate for the SLM process, but more work should be conducted to achieve excellent comprehensive properties.

show abstract

Prediction of Primary Dendrite Arm Spacing in Pulsed Laser Surface Melted Single Crystal Superalloy

Cited by 8 publications

References 32 publications

Thermal and Mechanical Variation Analysis on Multi-Layer Thin Wall during Continuous Laser Deposition, Continuous Pulsed Laser Deposition, and Interval Pulsed Laser Deposition

Thermal and Mechanical Variation Analysis on Multi-Layer Thin Wall during Continuous Laser Deposition, Continuous Pulsed Laser Deposition, and Interval Pulsed Laser Deposition

Optimizing process for pulsed laser additive manufacturing of nickel-based single crystal superalloy

Microstructural Features and Mechanical Behaviors of Al0.5Cr0.8CoFeNi2.5V0.2 High-Entropy Alloys Fabricated by Selective Laser Melting Technique

Contact Info

Product

Resources

About