Characteristics of Metal Specimens Formed by Selective Laser Melting: A State-of-the-Art Review

Chen, Dongju; Wang, Peng; Pan, Ri; Zha, Chunqing; Fan, Jinwei; Dong, Liang; Zhao, Yang

doi:10.1007/s11665-020-05323-6

Cited by 22 publications

(9 citation statements)

References 190 publications

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“…Thus, an effective forming effect can be achieved by combining coarse and fine powder particles during the LPBF process. The particle size ratio and particle sphericity must be optimised to guarantee the uniformity of the powder distribution and stability of the powderdispensing system [79]. Baitimerov et al [80] have investigated an AlSi12 alloy by employing three different powder batches that varied in morphology, particle size, and distribution.…”

Section: Powder-related Parametersmentioning

confidence: 99%

On the current research progress of metallic materials fabricated by laser powder bed fusion process: a review

Abd‐Elaziem

Elkatatny

Abd-Elaziem

et al. 2022

Journal of Materials Research and Technology

117

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Section: Powder-related Parametersmentioning

confidence: 99%

On the current research progress of metallic materials fabricated by laser powder bed fusion process: a review

Abd‐Elaziem

Elkatatny

Abd-Elaziem

et al. 2022

Journal of Materials Research and Technology

117

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“…However, the NiTi alloy prepared by SLM will cause "step effect" and "spheroidization effect" due to its forming characteristics of "layered manufacturing and layer-by-layer superposition". At the same time, the inner and outer surfaces of NiTi alloy will adhere to unmelted powder particles, resulting in high surface porosity, poor roughness and low dimensional accuracy [9][10]. Therefore, polishing is the last key process to ensure the properties of additive manufacturing parts.…”

Section: Introductionmentioning

confidence: 99%

Study on electrochemical polishing process parameters of SLM-NiTi alloy based on Box-Behnken response surface method

Che,

Shi,

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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NiTi alloy has unique super elasticity and shape memory, and is widely used in aerospace, biomedical and intelligent control fields. At present, the mainstream selective laser melting technology (SLM) can prepare NiTi alloy with complex structure, but the surface roughness is poor, which needs to be processed by electrochemical polishing. In order to optimize the electrochemical polishing process parameters, Box-Behnken response surface was used for regression analysis in this paper. Surface roughness was used as an evaluation index to analyze the influence of voltage, temperature, and reaction time on roughness. Based on the results of electrochemical polishing experiments, a prediction model for surface roughness was established and its response surface graph was obtained, the significance of the prediction model and parameters was tested using analysis of variance. The results indicate that the model can effectively predict the surface roughness of SLM-NiTi alloy after electrochemical polishing, and the best parameters are as follows: the voltage is 13.5V, the temperature is 27.7 C  , and the reaction time is 53 seconds, which lays the foundation for high efficiency and high quality polishing of SLM-NiTi alloy, and has important scientific significance and research value for expanding the application of SLM-NiTi alloy parts.

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“…Titanium-based alloy is an important nonferrous metal with the advantages of low density, low thermal expansion coefficient, excellent corrosion resistance, high specific strength, nontoxic and nonmagnetic, etc., which is widely used in aerospace, marine, petroleum energy, national defense and other fields (Chen et al , 2021; Jia et al , 2021). With the development of additive manufacturing (AM), the use of laser powder bed fusion (LPBF) to prepare Ti-6Al-4V parts has become the focus and hotspot of research.…”

Section: Introductionmentioning

confidence: 99%

Study on the influence of process parameters on high performance Ti-6Al-4V parts in laser powder bed fusion

Wang

Chen

Fan

et al. 2022

RPJ

Self Cite

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Purpose The purpose of this paper is to improve the performance and quality of Ti-6Al-4V fabricated by laser powder bed fusion. Design/methodology/approach Single-track experiments were conducted during the fabrication process to obtain the single tracks with excellent wettability to narrow the process parameter window. The effects of process parameters on the build surface, cross-section, relative density, defects, surface roughness, microstructure and mechanical properties of the parts were analyzed through multilayer fabrication experiments and surface optimization experiments. Findings The point distance has the greatest influence on the build surface of the fabricated parts, and the unmelted defects can be eliminated when the point distance is 35 µm. The relative density of the fabricated parts decreased with the increase of the point distance, and the hatch spacing has different characteristics with respect to the relative density of the fabricated parts under different laser powers. It was observed that the most of experimental groups with higher relative densities than 99%, and the highest density could reach 99.99%. The surface roughness can be reduced to less than 10 µm through remelting optimization. Originality/value The research results can provide theoretical support for scientific researchers and data support for engineers.

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Characteristics of Metal Specimens Formed by Selective Laser Melting: A State-of-the-Art Review

Cited by 22 publications

References 190 publications

On the current research progress of metallic materials fabricated by laser powder bed fusion process: a review

On the current research progress of metallic materials fabricated by laser powder bed fusion process: a review

Study on electrochemical polishing process parameters of SLM-NiTi alloy based on Box-Behnken response surface method

Study on the influence of process parameters on high performance Ti-6Al-4V parts in laser powder bed fusion

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