Research on the limitations of laser energy density and microstructure characteristics of selective laser melted AlSi10Mg alloy

Dong, Sensen; Zhang, Xiaoxun; Ma, Fei; Jiang, Jialin; Yang, Wei

doi:10.1016/j.ijleo.2020.165211

Cited by 6 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the WC content increases to 20% [Figures 4(d)], the melt pool is discontinuous and the melt pool boundaries can be hardly distinguished. During LPBF process, the melt pool experiences cycled heating and different zones can be formed in the melt pool (Dong et al , 2020). Liu et al (2020) and Prashanth and Eckert (2017) have revealed that the fine cellular-dendritic microstructure and elemental segregation can commonly be observed along melt pool boundary.…”

Section: Resultsmentioning

confidence: 99%

“…And metastable cellular microstructure can be also formed in many LPBF-printed alloy system because of the constitutional supercooling, interfacial kinetics and the heat transfer aspects associated with the alloy (Prashanth and Eckert, 2017). The growing direction of martensite is almost perpendicular to melt Figure 4 The OM images of top cross-section of (a) 18Ni300 and WC/18Ni300 composites with (b) 5% WC, (c) 10% WC, and (d) 20% WC; side cross-section of (e) 18Ni300, the WC/18Ni300 composites with (f) 10% WC and (g) 20% WC pool boundaries because of the highest heat flow (Dong et al, 2020;Yang et al, 2019). Note that the obvious interface layer [Figure 6 (c)] is clearly observed surrounding the WC particles due to the element diffusion, which can improve the mechanical properties of the composite (Chen et al, 2019).…”

Section: Microstructural Analysismentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Laser powder bed fusion of granulation-sintering-deoxygenation WC/18Ni300 composites: anisotropic microstructure characterization and wear properties

Yao

Teng

et al. 2023

RPJ

View full text Add to dashboard Cite

Purpose Laser powder bed fusion (LPBF) can be used to fabricate complex extrusion die without the limitation of structures. Layer-by-layer processing leads to differences in microstructures and wear properties. This study aims to investigate the microstructure evolution and effects of tungsten carbide (WC) on the wear properties of LPBF-printed 18Ni300. Design/methodology/approach Economical spherical granulation-sintering-deoxygenation (GSD) WC-reinforced 18Ni300 steel matrix composites were produced by LPBF from powder mixtures of WC and 18Ni300. The effects of WC contents on anisotropic microstructures and wear properties of the composites were investigated. Findings The relative density is more than 99% for all the composites except 25% WC/18Ni300 composite. The grain sizes distributed on the top cross-section are smaller than those on the side cross-section. After adding WC particles, more high-angle grain boundaries and larger Schmid factor generate, and deformed grains decrease. With increasing WC contents, the hardness first decreases and then increases but the wear volume loss decreases. The side cross-section of the composite has higher hardness and better wear resistance. The 18Ni300 exhibits adhesive wear accompanying with abrasive wear, while plowing and fatigue wear are the predominant wear mechanisms of the composites. Originality/value Economical spherical GSD WC particles can be used to improve the wear resistance. The novel WC/18Ni300 composites are suitable for the application under the abrasive wear condition with low stress.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Microstructural Analysismentioning

confidence: 99%

See 1 more Smart Citation

Laser powder bed fusion of granulation-sintering-deoxygenation WC/18Ni300 composites: anisotropic microstructure characterization and wear properties

Yao

Teng

et al. 2023

RPJ

View full text Add to dashboard Cite

show abstract

“…Various microstructural aspects of Al-Si-10Mg LB-PBF have been reviewed in the literature. For example, Don et al [8] reported that the LB-PBF Al-Si-10Mg meltpool morphology is not always driven by energy density because the hatch spacing cannot always change the morphology of the meltpool. If the melt track is solidified before the laser reaches the end of the track, then hatch space is not a driving factor for meltpool morphology.…”

Section: Microstructurementioning

confidence: 99%

Numerical and experimental investigations on manufacturability of Al–Si–10Mg thin wall structures made by LB-PBF

Khorasani¹,

Leary²,

Downing³

et al. 2023

Thin-Walled Structures

View full text Add to dashboard Cite

Dimensional deviations in Ti-6Al-4V discs produced with different process parameters during selective laser melting

Pal,

Milković,

Ramadani

et al. 2023

Int J Adv Manuf Technol

View full text Add to dashboard Cite

When manufacturing complicated products where both material and design play a role, especially thin and curved components, it is difficult to maintain accurate dimensions in Selective Laser Melting. Considering these difficulties, this article presents the dimensional errors in the fabrication of Ti-6Al-4V discs and their thermomechanics during manufacturing. Various combinations of laser processing parameters were used to fabricate the 2.00 mm thick discs with a diameter of 5.70 mm. It was found that the thickness shortened and the round shape changed to an oval shape for most of the discs. The thickness decreased along the build-up direction from the bottom to the top and formed a taper that increased with increasing energy density (ED). The horizontal diameter of the discs changed slightly, while the vertical diameters changed remarkably with increasing ED. On the other hand, reducing the laser power resulted in a reduction of the roundness error, while it caused a reduction of the thickness. The hatch spacing significantly affected the volume of the melt pool and caused a change in the vertical diameter. The central part of the curved surface of the discs became concave and the concavity increased due to the increasing ED.

show abstract

Research on the limitations of laser energy density and microstructure characteristics of selective laser melted AlSi10Mg alloy

Cited by 6 publications

References 30 publications

Laser powder bed fusion of granulation-sintering-deoxygenation WC/18Ni300 composites: anisotropic microstructure characterization and wear properties

Laser powder bed fusion of granulation-sintering-deoxygenation WC/18Ni300 composites: anisotropic microstructure characterization and wear properties

Numerical and experimental investigations on manufacturability of Al–Si–10Mg thin wall structures made by LB-PBF

Dimensional deviations in Ti-6Al-4V discs produced with different process parameters during selective laser melting

Contact Info

Product

Resources

About