Effect of volumetric energy density on microstructure and tribological properties of FeCoNiCuAl high-entropy alloy produced by laser powder bed fusion

Ren, Yaojia; Liang, Luxin; Shan, Quan; Cai, A.H.; Du, Jingguang; Huang, Qianli; Liu, Shifeng; Yang, Xin; Tian, Yingtao; Wu, Hong

doi:10.1080/17452759.2020.1848284

Cited by 36 publications

(8 citation statements)

References 57 publications

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“…In this experiment, the powder feeding rate ( Fv ) remained unchanged at 6 g/min. For continuous laser, the average energy density (ED) is 14 :…”

Section: Simulation Analysismentioning

confidence: 99%

Three-dimensional numerical simulation of temperature field evolution in laser cladding CoCrFeNi high-entropy alloy process

zhou,

Zhang,

Chen

et al. 2023

Eighteenth National Conference on Laser Technology and Optoelectronics

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There have been many studies on the forming process of CoCrFeNi high-entropy alloy by laser additive manufacturing, but there is a lack of systematic research on the numerical simulation of the forming process. This paper establishes a three-dimensional transient model of laser additive manufacturing high-entropy alloy by combining numerical simulation with experiment. The temperature field distribution of laser additive manufacturing CoCrFeNi high-entropy alloy on 316L substrate is simulated. The temperature distribution cloud diagram is obtained under different laser process parameters and the temperature change curve at the same node. The mechanism of surface spheroidization, pore, and metallurgical defect formation is revealed, and the experimental verification is realized. Finally, the forming process of laser cladding CoCrFeNi high entropy alloy block was explored. The results show that the maximum temperature of the cladding layer can reach more than 5000 °C during the cladding process. When other conditions remain unchanged, when the laser power increases from 1000 W to 1400 W, the temperature at the junction increases from 1588.63 °C to 2238.64 °C. At the same time, due to the insufficient melting of metal powder and the impact of powder on the molten pool, the surface of the additive is powdered and spheroidized. In addition, low laser power and low scanning speed will cause metallurgical defects between the cladding and the substrate.

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“…In this experiment, the powder feeding rate ( Fv ) remained unchanged at 6 g/min. For continuous laser, the average energy density (ED) is 14 :…”

Section: Simulation Analysismentioning

confidence: 99%

Three-dimensional numerical simulation of temperature field evolution in laser cladding CoCrFeNi high-entropy alloy process

zhou,

Zhang,

Chen

et al. 2023

Eighteenth National Conference on Laser Technology and Optoelectronics

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show abstract

“…In addition to MPEA powder feedstock, the AM processing parameters are considered as the main factors controlling the densification process of AM MPEAs. For instance, the relationship between the volume energy density (VED) and the relative density of LPBF FeCoNiCuAl was investigated and established by Ren et al [104]. It was found that poor densification was generally caused by incomplete melting with low VED and keyhole formation with high VED, both leading to the formation of pores in the fabricated MPEA parts.…”

Section: Key Microstructure Features and Characteristics In Am Mpeas ...mentioning

confidence: 99%

Review: Multi-principal element alloys by additive manufacturing

Ferry

Kruzic

et al. 2022

J Mater Sci

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Multi-principal element alloys (MPEAs) have attracted rapidly growing attention from both research institutions and industry due to their unique microstructures and outstanding physical and chemical properties. However, the fabrication of MPEAs with desired microstructures and properties using conventional manufacturing techniques (e.g., casting) is still challenging. With the recent emergence of additive manufacturing (AM) techniques, the fabrication of MPEAs with locally tailorable microstructures and excellent mechanical properties has become possible. Therefore, it is of paramount importance to understand the key aspects of the AM processes that influence the microstructural features of AM fabricated MPEAs including porosity, anisotropy, and heterogeneity, as well as the corresponding impact on the properties. As such, this review will first present the state-of-the-art in existing AM techniques to process MPEAs. This is followed by a discussion of the microstructural features, mechanisms of microstructural evolution, and the mechanical properties of the AM fabricated MPEAs. Finally, the current challenges and future research directions are summarized with the aim to promote the further development and implementation of AM for processing MPEAs for future industrial applications.

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“…Moreover, the size of debris in Figure 11 g is much larger than the paralleled samples. This is a typical feature of delamination wear [37][38][39]. The intermetallic compounds as a function of harder and more brittle phases, can damage the plastic of the sample.…”

Section: Tribological Behaviors and Microhardnessmentioning

confidence: 99%

Microstructure and tribological behaviors of FeCoCrNiMoSix high-entropy alloy coatings prepared by laser cladding

Yang

Ren

Yan-wen

et al. 2022

Surface and Coatings Technology

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Effect of volumetric energy density on microstructure and tribological properties of FeCoNiCuAl high-entropy alloy produced by laser powder bed fusion

Cited by 36 publications

References 57 publications

Three-dimensional numerical simulation of temperature field evolution in laser cladding CoCrFeNi high-entropy alloy process

Three-dimensional numerical simulation of temperature field evolution in laser cladding CoCrFeNi high-entropy alloy process

Review: Multi-principal element alloys by additive manufacturing

Microstructure and tribological behaviors of FeCoCrNiMoSix high-entropy alloy coatings prepared by laser cladding

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