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Non-destructive evaluation of internal defects in additive manufactured aluminium
Örebro universitet, Institutionen för naturvetenskap och teknik.ORCID-id: 0000-0003-1408-2249
Örebro universitet, Institutionen för naturvetenskap och teknik.ORCID-id: 0000-0002-8144-8821
Örebro universitet, Institutionen för naturvetenskap och teknik.ORCID-id: 0000-0003-3298-502X
Linköping University, Linköping, Sweden.
2016 (engelsk)Konferansepaper, Publicerat paper (Fagfellevurdert)
sted, utgiver, år, opplag, sider
2016.
Emneord [en]
additive manufacturing, selective laser melting, aluminium, computed tomography, ultrasonic inspection, eddy current
HSV kategori
Forskningsprogram
Maskinteknik
Identifikatorer
URN: urn:nbn:se:oru:diva-51003OAI: oai:DiVA.org:oru-51003DiVA, id: diva2:940896
Konferanse
World PM 2016, Powder Metallurgy World Congress, Hamburg, Germany, October 9-13, 2016
Tilgjengelig fra: 2016-06-21 Laget: 2016-06-21 Sist oppdatert: 2020-01-31bibliografisk kontrollert
Inngår i avhandling
1. Some aspects on designing for metal Powder Bed Fusion
Åpne denne publikasjonen i ny fane eller vindu >>Some aspects on designing for metal Powder Bed Fusion
2017 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Additive Manufacturing (AM) using the Powder Bed Fusion (PBF) is a relatively new manufacturing method that is capable of creating shapes that was previously practically impossible to manufacture. Many think it will revolutionize how manufacturing will be done in the future. This thesis is about some aspects of when and how to Design for Additive Manufacturing (DfAM) when using the PBF method in metal materials. Designing complex shapes is neither easy nor always needed, so when to design for AM is a question with different answers depending on industry or product. The cost versus performance is an important metric in making that selection. How to design for AM can be divided into how to improve performance and how to improve additive manufacturability where how to improve performance once depends on product, company and customer needs. Using advanced part shaping techniques like using Lattices or Topology Optimization (TO) to lower part mass may increase customer value in addition to lowering part cost due to faster part builds and less powder and energy use. Improving PBF manufacturability is then warranted for parts that reach series production, where determining an optimal build direction is key as it affects many properties of PBF parts. Complex shapes which are designed for optimal performance are usually more sensitive to defects which might reduce the expected performance of the part. Non Destructive Evaluation (NDE) might be needed to certify a part for dimensional accuracy and internal defects prior use. The licentiate thesis covers some aspects of both when to DfAM and how to DfAM of products destined for series production. It uses design by Lattices and Topology Optimization to reduce mass and looks at the effect on part cost and mass. It also shows effects on geometry translation accuracies from design to AM caused by differences in geometric definitions. Finally it shows the effect on how different NDE methods are capable of detecting defects in additively manufactured parts.

sted, utgiver, år, opplag, sider
Örebro: Örebro University, 2017. s. 80
Serie
Örebro Studies in Technology, ISSN 1650-8580 ; 74
Emneord
Additive Manufacturing, AM, DfAM, lattice, Powder Bed Fusion, Topology optimization, Selective Laser Melting, Electron Beam Melting, Design for manufacturability
HSV kategori
Identifikatorer
urn:nbn:se:oru:diva-62947 (URN)
Presentation
2017-11-29, Örebro universitet, Prismahuset, sal P258, Fakultetsgatan 1, Örebro, 13:15 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2017-12-05 Laget: 2017-12-05 Sist oppdatert: 2020-01-31bibliografisk kontrollert

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