Intelligent Additive Manufacturing Architecture for Enhancing Uniformity of Surface Roughness and Mechanical Properties of Laser Powder Bed Fusion Components

Tran, Hong-Chuong; Lo, Yu-Lung; Yang, Haw‐Ching; Hsiao, Hung‐Chang; Cheng, Fan‐Tien; Kuo, Tsung-Han

doi:10.1109/tase.2022.3204847

Cited by 8 publications

(6 citation statements)

References 32 publications

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“…The resulting small spatters were not transported away from the melting zone by the air flow in the chamber, and hence settled back on the sample surface in the form of small particles [ 26 ]. As the scanning speed was further increased to 1000 mm/s, the melt pool became unstable and gave rise to a poor surface roughness [ 21 , 27 ]. Consequently, for both settings of the hatching space, the sample surface contained many tiny particles ( Figure 6 c,f).…”

Section: Resultsmentioning

confidence: 99%

“…FA powder with a particle size of 0.4~0.8 μm was prepared by synthesizing Ca 3 (PO 4 ) 2 and CaF 2 using a pressure-less stoichiometric method in accordance with the reaction 3Ca 3 (PO 4 ) 2 + CaF 2 → Ca 10 (PO 4 ) 6 F 2 [ 21 ]. Briefly, 3Ca 3 (PO 4 ) 2 and CaF 2 were mixed with a molar ratio of 3:1 and then further mixed with ethanol with a molar ratio of 1:3 and stirred for 24 h. The resulting mixture was dried at a temperature of 120 °C for 24 h and sieved with a standard 120 mesh.…”

Section: Methodsmentioning

confidence: 99%

“…To prevent oxidation of the metal powder, the printing process was performed in a nitrogen environment with an oxygen concentration of less than 1000 ppm. In the L-PBF process, the quality of the top surface of each layer has a significant impact on the mechanical properties of the final component [ 21 , 22 ]. Accordingly, a surface-scanning technique was employed to determine the optimal processing conditions for each powder material.…”

Section: Methodsmentioning

confidence: 99%

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Mechanical Properties of Titanium/Nano-Fluorapatite Parts Produced by Laser Powder Bed Fusion

Lin

Jiang

et al. 2023

Materials

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Laser powder bed fusion (L-PBF) has attracted great interest in recent years due to its ability to produce intricate parts beyond the capabilities of traditional manufacturing processes. L-PBF processed biomedical implants are usually made of commercial pure titanium (CP-Ti) or its alloys. However, both alloys are naturally bio-inert, and thus reduce the formation of apatite as implants are put into the human body. Accordingly, in an attempt to improve the bioactivity of the materials used for making orthopedic implants, the present study decomposed fluorapatite material (FA, (Ca10(PO4)6F2)) into the form of nano-powder and mixed this powder with CP-Ti powder in two different ratios (99%Ti + 1%FA (Ti-1%FA) and 98%Ti + 2%FA (Ti-2%FA)) to form powder material for the L-PBF process. Experimental trials were conducted to establish the optimal processing conditions (i.e., laser power, scanning speed and hatching space) of the L-PBF process for the two powder mixtures and the original CP-Ti powder with no FA addition. The optimal parameters were then used to produce tensile test specimens in order to evaluate the mechanical properties of the different samples. The hardness of the various samples was also examined by micro-Vickers hardness tests. The tensile strength of the Ti-1%FA sample (850 MPa) was found to be far higher than that of the CP-Ti sample (513 MPa). Furthermore, the yield strength of the Ti-1%FA sample (785 MPa) was also much higher than that of the CP-Ti sample (472 MPa). However, the elongation of the Ti-1%FA sample (6.27 %) was significantly lower than that of the CP-Ti sample (16.17%). Finally, the hardness values of the Ti-1%FA and Ti-2%FA samples were around 63.8% and 109.4%, respectively, higher than that of the CP-Ti sample.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Mechanical Properties of Titanium/Nano-Fluorapatite Parts Produced by Laser Powder Bed Fusion

Lin

Jiang

et al. 2023

Materials

Self Cite

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“…Predicting or measuring the roughness Metal LPBF, WAAM [10][11][12][13][14][15][16][17][18][19] Polymer SLS, FFF [20][21][22][23][24][25][26][27] Methods for reducing roughness Metal LBF, DMLS [29,50,[56][57][58][59][60][61][62][63][64][65][66] Polymer [28] Effects of printing and process parameters on roughness Metal LBF, WAAM, GMAW [30][31][32][33][34][35][36][37][38][39][40] Polymers FFF [41][42][43] Effects of roughness on part properties Corrosion LPBF-M [49,67] Mechanical LPBF-M, Arbitrary [44]…”

Section: Topic Manufacturing Process Referencesmentioning

confidence: 99%

Surface Properties and Tribological Behavior of Additively Manufactured Components: A Systematic Review

et al. 2023

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Innovative additive manufacturing processes for resilient and sustainable production will become even more important in the upcoming years. Due to the targeted and flexible use of materials, additive manufacturing allows for conserving resources and lightweight design enabling energy-efficient systems. While additive manufacturing processes were used in the past several decades mainly for high-priced individualized components and prototypes, the focus is now increasingly shifting to near-net-shape series production and the production of spare parts, whereby surface properties and the tribological behavior of the manufactured parts is becoming more and more important. Therefore, the present review provides a comprehensive overview of research in tribology to date in the field of additively manufactured components. Basic research still remains the main focus of the analyzed 165 papers. However, due to the potential of additive manufacturing processes in the area of individualized components, a certain trend toward medical technology applications can be identified for the moment. Regarding materials, the focus of previous studies has been on metals, with stainless steel and titanium alloys being the most frequently investigated materials. On the processing side, powder bed processes are mainly used. Based on the present literature research, the expected future trends in the field of tribology of additively manufactured components can be identified. In addition to further basic research, these include, above all, aspects of process optimization, function integration, coating, and post-treatment of the surfaces.

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“…To this end, huge reforms have been made in various industries [17]. Lightweight, as an important measure to save energy and reduce carbon in automobiles, has been included in one of the nine technological development directions of the "Energy Saving and New energy Vehicle Technology Roadmap 2.0" [18]. At present, the lightweight design of automobiles mainly starts from the three aspects of material lightweight, structure optimization and changing process [19].…”

Section: Introductionmentioning

confidence: 99%

A Case Study on Structural Optimization Design of Shock Absorber Brackets in Automobile Suspension

Liu,

Pan,

Cui

et al. 2023

IEEE Access

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For connecting plate of shock absorber bracket in automobile suspension, lightweight requirement is a mainstream design tendency. Based on the principle of maximum stiffness, this work conducts a case study on structural optimization design of shock absorber brackets in automobile suspension. Firstly, both TI-6AL-4V alloy material and the motion simulation function of Inspire software are employed for use in the investigation. It is expected to simulate the motion state of automobile shock absorber extract the load effectively. Hence, the load is applied to the finite element model of the shock absorber connecting plate as the boundary condition. Then, the software is used to explore the shape control method for the connecting plate under different optimization objectives. Also, the topology optimization is carried out on the premise of 2-factor 4-level orthogonal test, and the extrusion is used as the shape control method. Finally, using 8 mm thickness as constraint condition, the optimized structure with safety factor of 2.3 and weight loss rate of 72.6% can be obtained.

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Intelligent Additive Manufacturing Architecture for Enhancing Uniformity of Surface Roughness and Mechanical Properties of Laser Powder Bed Fusion Components

Cited by 8 publications

References 32 publications

Mechanical Properties of Titanium/Nano-Fluorapatite Parts Produced by Laser Powder Bed Fusion

Mechanical Properties of Titanium/Nano-Fluorapatite Parts Produced by Laser Powder Bed Fusion

Surface Properties and Tribological Behavior of Additively Manufactured Components: A Systematic Review

A Case Study on Structural Optimization Design of Shock Absorber Brackets in Automobile Suspension

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