Research on Surface Roughness of AlSi10Mg Parts Fabricated by Laser Powder Bed Fusion

Li, Baoqiang; Li, Zhonghua; Bai, Peikang; Liu, Bin; Kuai, Zezhou

doi:10.3390/met8070524

Cited by 37 publications

(19 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was found that the surface roughness on the gas-averted surfaces (Sa = 17.1 ± 1.7 µm) is higher than on the gas-facing surfaces (Sa = 14.8 ± 1.8 µm). This result agrees with findings from similar investigations (Li et al, 2018).…”

Section: Correlation Between Defects and Propertiessupporting

confidence: 94%

A Structured Approach to Reduce Design Iterations in Additive Manufacturing

Wirths

Bleckmann²,

Paetzold

2021

Proc. Des. Soc.

View full text Add to dashboard Cite

Additive Manufacturing technologies are based on a layer-by-layer build-up. This offers the possibility to design complex geometries or to integrate functionalities in the part. Nevertheless, limitations given by the manufacturing process apply to the geometric design freedom. These limitations are often unknown due to a lack of knowledge of the cause-effect relationships of the process. Currently, this leads to many iterations until the final part fulfils its functionality. Particularly for small batch sizes, producing the part at the first attempt is very important. In this study, a structured approach to reduce the design iterations is presented. Therefore, the cause-effect relationships are systematically established and analysed in detail. Based on this knowledge, design guidelines can be derived. These guidelines consider process limitations and help to reduce the iterations for the final part production. In order to illustrate the approach, the spare parts production via laser powder bed fusion is used as an example.

show abstract

Section: Correlation Between Defects and Propertiessupporting

confidence: 94%

A Structured Approach to Reduce Design Iterations in Additive Manufacturing

Wirths

Bleckmann²,

Paetzold

2021

Proc. Des. Soc.

View full text Add to dashboard Cite

show abstract

“…Additionally, as observed by X-ray computed tomography, porosity distribution has not shown any pattern that can be related to stress relaxation (see Figure 5c in [13]). As shown in [35] for LPBF AlSi10Mg, the two surfaces facing Ar flow output (surface 2) and opposite to it (surface 4) have the highest difference in the roughness. In our case, roughness measurements were performed at each lateral surface and summarized in Table 2.…”

Section: Effect Of Sample Orientation With Respect To Ar Flowmentioning

confidence: 83%

Exploring the Correlation between Subsurface Residual Stresses and Manufacturing Parameters in Laser Powder Bed Fused Ti-6Al-4V

Mishurova

Artzt

Haubrich

et al. 2019

Metals

View full text Add to dashboard Cite

Subsurface residual stresses (RS) were investigated in Ti-6Al-4V cuboid samples by means of X-ray synchrotron diffraction. The samples were manufactured by laser powder bed fusion (LPBF) applying different processing parameters, not commonly considered in open literature, in order to assess their influence on RS state. While investigating the effect of process parameters used for the calculation of volumetric energy density (such as laser velocity, laser power and hatch distance), we observed that an increase of energy density led to a decrease of RS, although not to the same extent for every parameter variation. Additionally, the effect of support structure, sample roughness and LPBF machine effects potentially coming from Ar flow were studied. We observed no influence of support structure on subsurface RS while the orientation with respect to Ar flow showed to have an impact on RS. We conclude recommending monitoring such parameters to improve part reliability and reproducibility.

show abstract

“…However, L-PBF technology has several limitations, particularly related to the poor surface finish and the need for final post-processing of the manufactured parts [10]. The parts manufactured using L-PBF show roughness values Ra between 3.2 and 12.5 µm [13], whereas conventional technologies obtain roughness values between 1-2 µm [11].…”

Section: Of 12mentioning

confidence: 99%

“…In addition, excessive laser power will lead to higher porosity. Thus, it is necessary to find a balance between the laser power and scan speed to ensure acceptable roughness and other properties such as porosity [11,12,23]. In addition, another process parameter that influences the roughness is the thickness of the layer used [27].…”

Section: Of 12mentioning

confidence: 99%

“…Due to the great development that the different technologies based on metal additive manufacturing (AM) have had in recent years, it seems reasonable that one of the most researched and promising metal AM process is the Laser Powder Bed Fusion (L-PBF) technology. This technology, also known by commercial names as Selective Laser Melting (SLM) or Direct Metal Laser Sintering (DMLS), is being applied for the direct manufacturing of functional components in different sectors [10,11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of the Laser Incidence Angle in the Surface of L-PBF Processed Parts

Sendino¹,

Gardon²,

Lartategui

et al. 2020

Coatings

View full text Add to dashboard Cite

The manufacture of multiple parts on the same platform is a common procedure in the Laser Powder Bed Fusion (L-PBF) process. The main advantage is that the entire working volume of the machine is used and a greater number of parts are obtained, thus reducing inert gas volume, raw powder consumption, and manufacturing time. However, one of the main disadvantages of this method is the possible differences in quality and surface finish of the different parts manufactured on the same platform depending on their orientation and location, even if they are manufactured with the same process parameters and raw powder material. Throughout this study, these surface quality differences were studied, focusing on the variation of the surface roughness with the angle of incidence of the laser with respect to the platform. First, a characterization test was carried out to understand the behavior of the laser in the different areas of the platform. Then, the surface roughness, microstructure, and minimum thickness of vertical walls were analyzed in the different areas of the platform. These results were related to the angle of incidence of the laser. As it was observed, the laser is completely perpendicular only in the center of the platform, whilst at the border of the platform, due to the incidence angle, it melts an elliptical area, which affects the roughness and thickness of the manufactured part. The roughness increases from values of Sa = 5.489 μm in the central part of the platform to 27.473 μm at the outer borders while the thickness of the manufactured thin walls increases around 40 μm.

show abstract

Research on Surface Roughness of AlSi10Mg Parts Fabricated by Laser Powder Bed Fusion

Cited by 37 publications

References 27 publications

A Structured Approach to Reduce Design Iterations in Additive Manufacturing

A Structured Approach to Reduce Design Iterations in Additive Manufacturing

Exploring the Correlation between Subsurface Residual Stresses and Manufacturing Parameters in Laser Powder Bed Fused Ti-6Al-4V

The Effect of the Laser Incidence Angle in the Surface of L-PBF Processed Parts

Contact Info

Product

Resources

About