3D printing of material measures for areal surface texture (Conference Presentation)

2018 ◽  
Author(s):  
Matthias Eifler ◽  
Julian Hering ◽  
Georg von Freymann ◽  
Jörg Seewig
Keyword(s):  
3D Printing ◽  
Surface Texture ◽  
Areal Surface

scholarly journals Correlation between surface texture and internal defects in laser powder-bed fusion additive manufacturing

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Makiko Yonehara ◽  
Chika Kato ◽  
Toshi-Taka Ikeshoji ◽  
Koki Takeshita ◽  
Hideki Kyogoku
Keyword(s):  
Additive Manufacturing ◽  
Surface Texture ◽  
In Situ Monitoring ◽  
Mean Square ◽  
Powder Bed Fusion ◽  
Internal Defects ◽  
Powder Bed ◽  
Texture Parameters ◽  
Areal Surface

AbstractThe availability of an in-situ monitoring and feedback control system during the implementation of metal additive manufacturing technology ensures that high-quality finished parts are manufactured. This study aims to investigate the correlation between the surface texture and internal defects or density of laser-beam powder-bed fusion (LB-PBF) parts. In this study, 120 cubic specimens were fabricated via application of the LB-PBF process to the IN 718 Ni alloy powder. The density and 35 areal surface-texture parameters of manufactured specimens were determined based on the ISO 25,178–2 standard. Using a statistical method, a strong correlation was observed between the areal surface-texture parameters and density or internal defects within specimens. In particular, the areal surface-texture parameters of reduced dale height, core height, root-mean-square height, and root-mean-square gradient demonstrate a strong correlation with specimen density. Therefore, in-situ monitoring of these areal surface-texture parameters can facilitate their use as control variables in the feedback system.

Performance specification of areal surface texture instruments exemplified by a self-built WLI

2020 ◽  
Author(s):  
Georgis Bulun ◽  
Matthias Eifler ◽  
Julian Hering ◽  
Georg von Freymann ◽  
Jörg Seewig
Keyword(s):  
Surface Texture ◽  
Performance Specification ◽  
Areal Surface

scholarly journals Towards a new definition of areal surface texture parameters on freeform surface

Measurement ◽  
2017 ◽  
Vol 109 ◽  
pp. 281-291 ◽  
Author(s):  
Luca Pagani ◽  
Qunfen Qi ◽  
Xiangqian Jiang ◽  
Paul J. Scott
Keyword(s):  
Surface Texture ◽  
Freeform Surface ◽  
Texture Parameters ◽  
Definition Of ◽  
Areal Surface

Traceability for Areal Surface Texture Measurement

2010 ◽  
Vol 437 ◽  
pp. 121-125 ◽  
Author(s):  
Richard Leach ◽  
Claudiu Giusca ◽  
Kazuya Naoi
Keyword(s):  
Surface Texture ◽  
Vertical Displacement ◽  
National Physical Laboratory ◽  
Air Bearing ◽  
Texture Measurement ◽  
Physical Laboratory ◽  
Working Volume ◽  
Definition Of ◽  
Laser Interferometers ◽  
Areal Surface

The deterministic structuring of a surface is having a profound effect on many industrial products by allowing the manufacturer to significantly alter the way in which a surface functions. This has led to a clear need in industry and academia for traceable areal surface texture measurements. To address this need traceable transfer artefacts and primary instrumentation are required. The National Physical Laboratory (NPL) is working on two projects – one to develop areal transfer artefacts and one to develop a traceable areal surface texture measuring instrument. The authors describe the development of the artefacts and instrument, and present some of the challenges that are still required to be able to offer an areal traceability measurement service to industry. The instrument has a working volume of 8 mm  8 mm  0.1 mm and uses a co-planar air-bearing slideway to move the sample. It also uses a novel vertical displacement measuring probe, incorporating an air-bearing and an electromagnetic force control mechanism. The motions of the slideway and the probe are measured by laser interferometers thus ensuring traceability of the measurements to the definition of the metre. The artefacts were manufactured using a range of machining technologies and in a range of geometries suitable for stylus and optical based instruments.

scholarly journals A Study on Surface Material Measures for Areal Surface Texture Measuring Instruments

2010 ◽  
Vol 76 (3) ◽  
pp. 349-353
Author(s):  
Kentaro NEMOTO ◽  
Kazuhisa YANAGI ◽  
Masato AKETAGAWA ◽  
Michimasa UCHIDATE ◽  
Ichiro YOSHIDA
Keyword(s):  
Surface Texture ◽  
Measuring Instruments ◽  
Surface Material ◽  
Areal Surface

Resistance of PLA Material Prepared By Additive Technology

2021 ◽  
Vol 105 (1) ◽  
pp. 319-327
Author(s):  
Zbynek Studeny ◽  
David Dobrocky ◽  
Lenka Dobšáková ◽  
Jiri Prochazka
Keyword(s):  
Cyclic Loading ◽  
3D Printing ◽  
Coefficient Of Friction ◽  
Surface Texture ◽  
Test Specimen ◽  
Sample Surface ◽  
Test Area ◽  
Reciprocating Motion ◽  
Additive Technology ◽  
The Coefficient Of Friction

The article studies the surface properties of PLA material prepared by additive technology, i.e. 3D printing. Samples with a square test area were printed by FFF technology. After 3D printing, the surface texture of the samples was evaluated in terms of microgeometry.Tribological tests were performed on the samples. The surface of the samples was cyclically stressed with the same load, always on the same path. Cyclic loading of the surface was performed on a UMT Bruker tribometer. The tribological properties between the sample surface and the test specimen in the shape of a ball were studied during the reciprocating motion. In particular, the coefficient of friction was measured and evaluated. The ball material was PTFE and Polypropylene.The wear parameters of samples and balls were documented and evaluated. The results of the tests are the load dependencies on the wear of the PLA material and the test specimens.

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