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Thermal simulation ...
Thermal simulation and phase modeling of bulk metallic glass in the powder bed fusion process
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- Lindwall, Johan (author)
- Luleå tekniska universitet,Material- och solidmekanik,Lulea Univ Technol, S-97187 Lulea, Sweden
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- Pacheco, Victor (author)
- Uppsala universitet,Oorganisk kemi
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- Sahlberg, Martin, 1981- (author)
- Uppsala universitet,Oorganisk kemi
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- Lundbäck, Andreas (author)
- Luleå tekniska universitet,Material- och solidmekanik,Lulea Univ Technol, S-97187 Lulea, Sweden
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- Lindgren, Lars-Erik (author)
- Luleå tekniska universitet,Material- och solidmekanik,Lulea Univ Technol, S-97187 Lulea, Sweden
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(creator_code:org_t)
- Elsevier, 2019
- 2019
- English.
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In: Additive Manufacturing. - : Elsevier. - 2214-8604 .- 2214-7810. ; 27, s. 345-352
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- One of the major challenges with the powder bed fusion process (PBF) and formation of bulk metallic glass (BMG) is the development of process parameters for a stable process and a defect-free component. The focus of this study is to predict formation of a crystalline phase in the glass forming alloy AMZ4 during PBF. The approach combines a thermal finite element model for prediction of the temperature field and a phase model for prediction of crystallization and devitrification. The challenge to simulate the complexity of the heat source has been addressed by utilizing temporal reduction in a layer-by-layer fashion by a simplified heat source model. The heat source model considers the laser power, penetration depth and hatch spacing and is represented by a volumetric heat density equation in one dimension. The phase model is developed and calibrated to DSC measurements at varying heating rates. It can predict the formation of crystalline phase during the non-isothermal process. Results indicate that a critical location for devitrification is located a few layers beneath the top surface. The peak is four layers down where the crystalline volume fraction reaches 4.8% when 50 layers are built.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- Additive manufacturing simulation
- BMG
- Heat input modeling
- PBF
- Phase evolution
- Material Mechanics
- Materialmekanik
Publication and Content Type
- ref (subject category)
- art (subject category)
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