Modeling of selective laser sintering/selective laser melting

West, Connor; Wang, Xuan

doi:10.1117/12.2256539

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…The Ti content of LeanSi is 1%, which results in a high ageing hardening potential [29]. The SLM manufacturing process is part of the powder bed fusion (PBD) processes, which are additive manufacturing processes (AMs) [7,[31][32][33][34][35]. Using SLM technology enables the manufacturing of tailor-made components [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Selective Laser Melting Fabrication Parameters on the Tensile Strength of an Aged New Maraging Steel Alloy with 8% Cr, Reduced Ni Content (7%), and No Co or Mo

Pérez-Gonzalo,

González-Pociño,

Alvarez-Antolin

et al. 2023

Materials

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The aim of this paper was to optimise the manufacturing parameters of a new maraging steel alloy with 8% Cr, reduced Ni content (7%), and no Co or Mo. This alloy was developed by ArcelorMittal and its trade name is LeanSi. The alloy was produced using the selective laser melting (SLM) process. In the as-built state, the microstructure of the alloy was fully martensitic. The optimisation of the manufacturing parameters was determined via a multivariate factorial design of experiments including 12 experiments and three factors. The factors (i.e., the fabrication parameters) analysed were laser power, scanning speed, and hatch distance. The objective was to eliminate porosity and maximise density. It was concluded that, to achieve this, the laser power should be set at 250 W, the scanning speed at 1000 mm/s, and the hatch distance at 80 microns. The porosity obtained under these manufacturing parameters was 0.06 ± 0.03% with a confidence level of 95%. If these manufacturing parameters were modified, the material exhibited a defective interlayer bond with the formation of “balling” and high porosity. The tensile specimens tested in the as-built state showed plastic deformation. However, all the aged specimens showed brittle fracture behaviour, evidenced by the presence of very small micro-cavities (where the fracture energy consumed was very small) and small cleavage planes. The specimens produced with the manufacturing parameters at their optimum levels and aged at 480 °C for 2 h achieved tensile strength values that averaged 1430 MPa. The porosity of these specimens was reduced by more than 85%. Reverse austenite was detected at ageing temperatures of 540 °C upwards.

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Section: Introductionmentioning

confidence: 99%

The Effect of Selective Laser Melting Fabrication Parameters on the Tensile Strength of an Aged New Maraging Steel Alloy with 8% Cr, Reduced Ni Content (7%), and No Co or Mo

Pérez-Gonzalo,

González-Pociño,

Alvarez-Antolin

et al. 2023

Materials

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“…[1][2][3][4][5][6][7] High aspect ratio microstructures (HARMs) with resolution beyond the diffraction limit and maintaining high depth are the key to the functionality of these optoelectronic devices. Stereolithography, [8] Selective laser sintering, [9] Nanoimprint lithography, [10] Single photon multilayer interference lithography, [11] and Laser direct writing lithography are all common fabrication methods for HARMs. [12][13][14] Among them, the laser direct writing technology directly uses the focused beam obtained by the objective lens as the direct writing head to fabricate the micro-nanostructures, which has the advantages of simple process, flexible processing and no mask.…”

mentioning

confidence: 99%

Laser Superdiffraction Optical Needle Direct Writing Lithography Method for Single‐Exposure Fabrication of High‐Aspect‐Ratio Microstructures

Wang

Zhang²,

Tian

et al. 2022

Adv Materials Technologies

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In this paper, a laser superdiffraction optical needle direct writing lithography method for single‐exposure fabrication of high‐aspect‐ratio microstructures (HARMs) is proposed. The principles of 3/4 circular image focusing and lithography exposure are theoretically analyzed, and the experimental setup is built. Experiments show that the linear interval and focusing accuracy of this method can reach 60 and 0.1 µm, respectively. Compared with the circular image focusing method, this method can determine the direction of defocus through the opening direction of the 3/4 circular spot. In addition, an optical needle with a resolution of 0.308 µm, a depth of focus of 1.836 µm, and an aspect ratio of 5.9538 is achieved by tightly focusing a radially polarized beam modulated by an annular amplitude type modulator with an annular factor of 0.7. Using this optical needle as the direct writing head, the HARM with a line width of 0.22 µm, a depth of 1.76 µm, and an aspect ratio of 8 is obtained experimentally by adjusting the photolithographic process parameters in combination with the focus detection curve. This method has the advantages of high fabrication efficiency, super diffraction resolution and high‐aspect‐ratio, which provides a new research idea for the fabrication of HARMs.

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An inferential analysis of stainless steel in additive manufacturing using bibliometric indicators

Arunmozhi,

Sudhakarapandian,

Sultan Batcha

et al. 2023

Materials Today: Proceedings

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Modeling of selective laser sintering/selective laser melting

Cited by 5 publications

References 32 publications

The Effect of Selective Laser Melting Fabrication Parameters on the Tensile Strength of an Aged New Maraging Steel Alloy with 8% Cr, Reduced Ni Content (7%), and No Co or Mo

The Effect of Selective Laser Melting Fabrication Parameters on the Tensile Strength of an Aged New Maraging Steel Alloy with 8% Cr, Reduced Ni Content (7%), and No Co or Mo

Laser Superdiffraction Optical Needle Direct Writing Lithography Method for Single‐Exposure Fabrication of High‐Aspect‐Ratio Microstructures

An inferential analysis of stainless steel in additive manufacturing using bibliometric indicators

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