Processing and characterization of laser-sintered Al2O3/ZrO2/SiO2

Wang, Wei; Ma, Sha; Fuh, Jerry Ying Hsi; Li, Lu; Liu, Yongxian

doi:10.1007/s00170-013-4863-7

Cited by 19 publications

(13 citation statements)

References 17 publications

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“…Selective laser sintering (SLS) [5][6][7] and selective laser melting (SLM) [8][9][10] are quite promising, but these techniques have not yet shown any success in fabricating bulk net-shape magnesium specimens.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Selective Laser Melting of Bulk Net-Shape Pure Magnesium

Wang

Zhang

et al. 2015

Materials and Manufacturing Processes

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In this study, bulk net-shape pure magnesium was fabricated by selective laser melting (SLM). Effects of Mg particle size and processing parameters on the properties of SLM specimens were investigated. The scan speed and laser power were optimised based on macro observation of the forming process and resulted specimens. Through the comparison analysis of topology, density and micro-hardness, it was found that the bulk magnesium specimen made of -250 mesh powder showed better results than that made of -400 mesh powder. The relative densities of both SLM specimens were over 95%, and their micro-hardness values were higher than that of as-cast magnesium. It was also revealed that the scanning time interval (STI), as a relatively new processing parameter, had an obvious effect on the properties of SLM bulk magnesium in terms of surface morphology, roughness and micro-hardness.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Selective Laser Melting of Bulk Net-Shape Pure Magnesium

Wang

Zhang

et al. 2015

Materials and Manufacturing Processes

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“…AM enables the flexibility for people to fabricate products, especially those with complex geometries. Users can fabricate products directly with various materials such as polymers [49], ceramics [56], metals [35], etc. The basic principle of AM is that parts are made through adding materials by layers [16,33].…”

Section: Introductionmentioning

confidence: 99%

In situ monitoring of FDM machine condition via acoustic emission

Hai-xi

Wang

2015

Int J Adv Manuf Technol

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Fused deposition modeling (FDM) is one of the most popular additive manufacturing technologies for fabricating prototypes with complex geometry and different materials. However, current commercial FDM machines have the limitations in process reliability and product quality. In order to overcome these limitations and increase the levels of machine intelligence and automation, machine conditions need to be monitored more closely as in closedloop control systems. In this study, a new method for in situ monitoring of FDM machine conditions is proposed, where acoustic emission (AE) technique is applied. The proposed method allows for the identification of both normal and abnormal states of the machine conditions. The time-domain features of AE hits are used as the indicators. Support vector machines with the radial basis function kernel are applied for state identification. Experimental results show that this new method can potentially serve as a nonintrusive diagnostic and prognostic tool for FDM machine maintenance and process control.

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“…Previous researchers have studied the effect of process parameters (laser power and laser scanning speed) on density, surface roughness, and concluded that laser power is directly proportional to each response. Furthermore, laser scanning speed was found to be inversely proportional with all of these responses [3][4][5][6][7].…”

Section: /11mentioning

confidence: 99%

Influence of Laser Process Parameters on Properties of Alumina Parts Produced By SLS

Fayed¹,

Elmesalamy²,

Sobih

et al. 2017

International Conference on Aerospace Sciences and Aviation Tec

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Direct selective laser sintering (SLS) is an additive manufacturing technique for the fabrication of near net shaped parts directly from computer-aided design data by sintering together different layers with the help of a laser source. This paper presents an investigation of the physical properties (density and porosity) of alumina (Al 2 O 3) samples produced by SLS. Some input parameters, namely laser power and scan speed were selected for the investigation. The aim of this work is to understand the effect of these sintering parameters on the quality of the sintered layer (surface roughness), physical properties (density and porosity) and microstructure (grain size) are investigated. The results showed that maximum density of the sintered ceramics layers are of 3.54 gm/cm3 and minimum porosity of 4.34% were obtained at laser power 230 W and laser scanning speed 150 mm/min. The morphology was analyzed by means of field emission scanning electron microscope. Laser power and Scan speed were found to have a great influence on the surface roughness and morphology.

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Processing and characterization of laser-sintered Al2O3/ZrO2/SiO2

Cited by 19 publications

References 17 publications

Experimental Investigation on Selective Laser Melting of Bulk Net-Shape Pure Magnesium

Experimental Investigation on Selective Laser Melting of Bulk Net-Shape Pure Magnesium

In situ monitoring of FDM machine condition via acoustic emission

Influence of Laser Process Parameters on Properties of Alumina Parts Produced By SLS

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