Possibilities of CT Scanning as Analysis Method in Laser Additive Manufacturing

Aleksis Karme, Aki Kallonen, Ville-Pekka Matilainen, Heidi Piili, Antti Salminen

Tutkimustuotos: ArtikkelijulkaisuKonferenssiartikkeliTieteellinenvertaisarvioitu

Kuvaus

Laser additive manufacturing is an established and constantly developing technique. Structural assessment should be a key component to ensure directed evolution towards higher level of manufacturing. The macroscopic properties of metallic structures are determined by their internal microscopic features, which are difficult to assess using conventional surface measuring methodologies. X-ray microtomography (CT) is a promising technique for three-dimensional non-destructive probing of internal composition and build of various materials.
Aim of this study is to define the possibilities of using CT scanning as quality control method in LAM fabricated parts. Since the parts fabricated with LAM are very often used in high quality and accuracy demanding applications in various industries such as medical and aerospace, it is important to be able to define the accuracy of the build parts. The tubular stainless steel test specimens were 3D modelled, manufactured with a modified research AM equipment and imaged after manufacturing with a high-power, high-resolution CT scanner. 3D properties, such as surface texture and the amount and distribution of internal pores, were also evaluated in this study.
Surface roughness was higher on the interior wall of the tube, and deviation from the model was systematically directed towards the central axis. Pore distribution showed clear organization and divided into two populations; one following the polygon model seams along both rims, and the other being associated with the concentric and equidistant movement path of the laser. Assessment of samples can enhance the fabrication by guiding the improvement of both modelling and manufacturing process.
Alkuperäiskielienglanti
LehtiPhysics Procedia
Vuosikerta78
Sivut347-356
Sivumäärä10
ISSN1875-3892
DOI - pysyväislinkit
TilaJulkaistu - 24 marraskuuta 2015
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaNordic Laser Materials Processing Conference - Lappeenranta, Suomi
Kesto: 25 elokuuta 201526 elokuuta 2015
Konferenssinumero: 15

Lisätietoja

Nordic Laser Materials Processing Conference
Volume: 78
Host publication title: 15th Nordic Laser Materials Processing Conference, Nolamp 15
Proceeding volume:

Tieteenalat

  • 216 Materiaalitekniikka
  • 114 Fysiikka

Lainaa tätä

Karme, Aleksis ; Kallonen, Aki ; Matilainen, Ville-Pekka ; Piili, Heidi ; Salminen, Antti. / Possibilities of CT Scanning as Analysis Method in Laser Additive Manufacturing. Julkaisussa: Physics Procedia. 2015 ; Vuosikerta 78. Sivut 347-356.
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title = "Possibilities of CT Scanning as Analysis Method in Laser Additive Manufacturing",
abstract = "Laser additive manufacturing is an established and constantly developing technique. Structural assessment should be a key component to ensure directed evolution towards higher level of manufacturing. The macroscopic properties of metallic structures are determined by their internal microscopic features, which are difficult to assess using conventional surface measuring methodologies. X-ray microtomography (CT) is a promising technique for three-dimensional non-destructive probing of internal composition and build of various materials.Aim of this study is to define the possibilities of using CT scanning as quality control method in LAM fabricated parts. Since the parts fabricated with LAM are very often used in high quality and accuracy demanding applications in various industries such as medical and aerospace, it is important to be able to define the accuracy of the build parts. The tubular stainless steel test specimens were 3D modelled, manufactured with a modified research AM equipment and imaged after manufacturing with a high-power, high-resolution CT scanner. 3D properties, such as surface texture and the amount and distribution of internal pores, were also evaluated in this study.Surface roughness was higher on the interior wall of the tube, and deviation from the model was systematically directed towards the central axis. Pore distribution showed clear organization and divided into two populations; one following the polygon model seams along both rims, and the other being associated with the concentric and equidistant movement path of the laser. Assessment of samples can enhance the fabrication by guiding the improvement of both modelling and manufacturing process.",
keywords = "216 Materials engineering, Laser additive manufacturing, Stainless Steel, CT scanning, 3D, Aanalysis, Methodology, Porosity, Surface roughness, Volumetric, 114 Physical sciences",
author = "Aleksis Karme and Aki Kallonen and Ville-Pekka Matilainen and Heidi Piili and Antti Salminen",
note = "Nordic Laser Materials Processing Conference Volume: 78 Host publication title: 15th Nordic Laser Materials Processing Conference, Nolamp 15 Proceeding volume:",
year = "2015",
month = "11",
day = "24",
doi = "10.1016/j.phpro.2015.11.049",
language = "English",
volume = "78",
pages = "347--356",
journal = "Physics Procedia",
issn = "1875-3892",
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Possibilities of CT Scanning as Analysis Method in Laser Additive Manufacturing. / Karme, Aleksis; Kallonen, Aki; Matilainen, Ville-Pekka; Piili, Heidi; Salminen, Antti.

julkaisussa: Physics Procedia, Vuosikerta 78, 24.11.2015, s. 347-356.

Tutkimustuotos: ArtikkelijulkaisuKonferenssiartikkeliTieteellinenvertaisarvioitu

TY - JOUR

T1 - Possibilities of CT Scanning as Analysis Method in Laser Additive Manufacturing

AU - Karme, Aleksis

AU - Kallonen, Aki

AU - Matilainen, Ville-Pekka

AU - Piili, Heidi

AU - Salminen, Antti

N1 - Nordic Laser Materials Processing Conference Volume: 78 Host publication title: 15th Nordic Laser Materials Processing Conference, Nolamp 15 Proceeding volume:

PY - 2015/11/24

Y1 - 2015/11/24

N2 - Laser additive manufacturing is an established and constantly developing technique. Structural assessment should be a key component to ensure directed evolution towards higher level of manufacturing. The macroscopic properties of metallic structures are determined by their internal microscopic features, which are difficult to assess using conventional surface measuring methodologies. X-ray microtomography (CT) is a promising technique for three-dimensional non-destructive probing of internal composition and build of various materials.Aim of this study is to define the possibilities of using CT scanning as quality control method in LAM fabricated parts. Since the parts fabricated with LAM are very often used in high quality and accuracy demanding applications in various industries such as medical and aerospace, it is important to be able to define the accuracy of the build parts. The tubular stainless steel test specimens were 3D modelled, manufactured with a modified research AM equipment and imaged after manufacturing with a high-power, high-resolution CT scanner. 3D properties, such as surface texture and the amount and distribution of internal pores, were also evaluated in this study.Surface roughness was higher on the interior wall of the tube, and deviation from the model was systematically directed towards the central axis. Pore distribution showed clear organization and divided into two populations; one following the polygon model seams along both rims, and the other being associated with the concentric and equidistant movement path of the laser. Assessment of samples can enhance the fabrication by guiding the improvement of both modelling and manufacturing process.

AB - Laser additive manufacturing is an established and constantly developing technique. Structural assessment should be a key component to ensure directed evolution towards higher level of manufacturing. The macroscopic properties of metallic structures are determined by their internal microscopic features, which are difficult to assess using conventional surface measuring methodologies. X-ray microtomography (CT) is a promising technique for three-dimensional non-destructive probing of internal composition and build of various materials.Aim of this study is to define the possibilities of using CT scanning as quality control method in LAM fabricated parts. Since the parts fabricated with LAM are very often used in high quality and accuracy demanding applications in various industries such as medical and aerospace, it is important to be able to define the accuracy of the build parts. The tubular stainless steel test specimens were 3D modelled, manufactured with a modified research AM equipment and imaged after manufacturing with a high-power, high-resolution CT scanner. 3D properties, such as surface texture and the amount and distribution of internal pores, were also evaluated in this study.Surface roughness was higher on the interior wall of the tube, and deviation from the model was systematically directed towards the central axis. Pore distribution showed clear organization and divided into two populations; one following the polygon model seams along both rims, and the other being associated with the concentric and equidistant movement path of the laser. Assessment of samples can enhance the fabrication by guiding the improvement of both modelling and manufacturing process.

KW - 216 Materials engineering

KW - Laser additive manufacturing

KW - Stainless Steel

KW - CT scanning

KW - 3D

KW - Aanalysis

KW - Methodology

KW - Porosity

KW - Surface roughness

KW - Volumetric

KW - 114 Physical sciences

U2 - 10.1016/j.phpro.2015.11.049

DO - 10.1016/j.phpro.2015.11.049

M3 - Conference article

VL - 78

SP - 347

EP - 356

JO - Physics Procedia

JF - Physics Procedia

SN - 1875-3892

ER -