Current Status and Progress on Technology of Selective Laser Melting of Metal Parts

Yongqiang, 杨永强 Yang; Jie, 陈杰 Chen; Changhui, 宋长辉 Song; Di, 王迪 Wang; Bai, Yuchao

doi:10.3788/lop55.011401

Cited by 13 publications

(2 citation statements)

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“…Selective laser melting (SLM) technology is a rising metal additive manufacturing technology, which is widely applied in diverse applications, including aerospace, 1–4 medical biology, 5–9 and automotive industries. 10 This technology is compatible with a variety of metals and yields high-quality mechanical components.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the gas flow system in a selective laser melting chamber using numerical methods

Zhou,

Li,

Chen

et al. 2024

Advances in Mechanical Engineering

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A well-designed flow field is a key factor to improve the surface quality of products by removing spatter, which is often generated during the selective laser melting (SLM) process. In the present study, three typical schemes are developed for the gas flow system of large-scale SLM equipment. In this regard, the flow deviation and velocity increase indices are implemented to characterize the flow uniformity in the chamber and gas flow velocity in the clearing area. The obtained results show that the inlet size significantly improves the flow uniformity and the segmented inlet increases the flow velocity above the machining surface. More specifically, when the velocity deviation index decreases from 0.3335 to 0.1538, the corresponding velocity index increases from 10.16% to 29.83%. To improve the flow uniformity on the machining surface, the effect of the inlet flow rate on the airflow over the machining surface is investigated. The obtained results show that when the inlet flow rate reduces to 0.2 m/s, the removal spatter improves while the airflow remains uniform. The results of this study can provide a reference for the design of SLM gas flow systems.

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Section: Introductionmentioning

confidence: 99%

Optimization of the gas flow system in a selective laser melting chamber using numerical methods

Zhou,

Li,

Chen

et al. 2024

Advances in Mechanical Engineering

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“…Laser powder bed fusion (LPBF) that belongs to PBF can build metallic parts with complex structures without relying on a mold. The part built with suitable process parameters could have excellent precision and be of high quality [15,16], which can broaden the application field of metal materials [17].…”

Section: Introductionmentioning

confidence: 99%

Densification Behavior and Build Quality of Duplex Stainless Steel Fabricated by Laser Powder Bed Fusion

Xiang,

Chen,

Zhao

et al. 2023

Metals

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A systematic study on the densification behavior and build quality of 2205 duplex stainless steel fabricated using laser powder bed fusion (LPBF) was performed by experiment and simulation, aiming to offer some supplementary work for research on additive manufacturing (AM) of duplex stainless steel. In this study, samples with differing laser powers were prepared, and a highest relative density of 98.87% was obtained. Then, the pore defects and surface morphologies were investigated to unveil densification behaviors during a building process. The relationship between surface morphologies and the formation of pores was discussed. It reveals that the inter-layer printing on these surface defects caused by unreasonable laser power could increase the possibility of inside pore defects and reduce the density of specimens. Particularly, the big spatters could be the cause of lack-of-fusion defects even under sufficient power input. Therefore, adequate intra- and inter-layer bonding under reasonable processing parameters is crucial for densification. The mechanical properties of the specimens prepared with the laser power of 260 W are the highest, and the yield strength, tensile strength, and elongation are 798.68 MPa, 953.63 MPa, and 10.85%, respectively.

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Study on the numerical simulation of laying powder for the selective laser melting process

Cao

2019

Int J Adv Manuf Technol

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Current Status and Progress on Technology of Selective Laser Melting of Metal Parts

Cited by 13 publications

References 0 publications

Optimization of the gas flow system in a selective laser melting chamber using numerical methods

Optimization of the gas flow system in a selective laser melting chamber using numerical methods

Densification Behavior and Build Quality of Duplex Stainless Steel Fabricated by Laser Powder Bed Fusion

Study on the numerical simulation of laying powder for the selective laser melting process

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