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On the microstructu...
On the microstructure of laser beam powder bed fusion alloy 718 and its influence on the low cycle fatigue behaviour
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- Balachandramurthi, Arun Ramanathan, 1989- (författare)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW,Univ West, Sweden
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- Jaladurgam, Nitesj Raj (författare)
- Chalmers University of Technology, Department of Physics, Gothenburg, SE-412 96, Sweden,Chalmers Univ Technol, Sweden
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- Kumara, Chamara (författare)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW,Univ West, Sweden
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- Hansson, Tomas, 1964- (författare)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),GKN Aerospace Sweden AB, Trollhättan, SE-461 38, Sweden,PTW,Univ West, Sweden; GKN Aerosp Sweden AB, Sweden
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- Moverare, Johan (författare)
- Linköpings universitet,Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),Linköping University, Department of Management and Engineering, Linköping, SE 581 83, Sweden,PTW,Konstruktionsmaterial,Tekniska fakulteten,Univ West, Sweden
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- Gårdstam, Johannes (författare)
- Qunitus Technologies AB, Västerås, SE-721 66, Sweden,Qunitus Technol AB, Sweden
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- Pederson, Robert, 1973- (författare)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW,Univ West, Sweden
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(creator_code:org_t)
- 2020-11-17
- 2020
- Engelska.
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Ingår i: Materials. - : MDPI AG. - 1996-1944. ; 13:22
- Relaterad länk:
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https://doi.org/10.3...
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Additive manufacturing of Alloy 718 has become a popular subject of research in recent years. Understanding the process-microstructure-property relationship of additively manufactured Alloy 718 is crucial for maturing the technology to manufacture critical components. Fatigue behaviour is a key mechanical property that is required in applications such as gas turbines. Therefore, in the present work, low cycle fatigue behaviour of Alloy 718 manufactured by laser beam powder bed fusion process has been investigated. The material was tested in as-built condition as well as after two different thermal post-treatments. Three orientations with respect to the building direction were tested to evaluate the anisotropy. Testing was performed at room temperature under controlled amplitudes of strain. It was found that defects, inclusions, strengthening precipitates, and Youngâs modulus influence the fatigue behaviour under strain-controlled conditions. The strengthening precipitates affected the deformation mechanism as well as the cycle-dependent hardening/softening behaviour. The defects and the inclusions had a detrimental effect on fatigue life. The presence of Laves phase in LB-PBF Alloy 718 did not have a detrimental effect on fatigue life. Youngâs modulus was anisotropic and it contributed to the anisotropy in strain-life relationship. Pseudo-elastic stress vs. fatigue life approach could be used to handle the modulus-induced anisotropy in the strain-life relationship. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Tillförlitlighets- och kvalitetsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Reliability and Maintenance (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Nyckelord
- 3D printers; Additives; Anisotropy; Defects; Industrial research; Laser beams; Microstructure
- Critical component; Deformation mechanism; Fatigue behaviour; Induced anisotropy; Low cycle fatigues; Process-microstructure-property relationships; Strain-controlled; Thermal post-treatments
- Fatigue of materials
- Production Technology
- Produktionsteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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