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The role of the str...
The role of the strengthening phases on the HAZ liquation cracking in a cast Ni-based superalloy used in industrial gas turbines
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- Rakoczy, Łukasz (författare)
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Kraków (POL)
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- Grudzień-Rakoczy, Małgorzata (författare)
- Łukasiewicz Research Network-Kraków Institute of Technology,Kraków (POL)
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- Rutkowski, Bogdan (författare)
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Kraków(POL)
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- Cygan, Rafał (författare)
- Investment Casting Division, Consolidated Precision Products Corporation, Rzeszów (POL)
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- Hanning, Fabian (författare)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),KAMPT
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- Cios, Grzegorz (författare)
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Kraków (POL)
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- Habisch, Stefan (författare)
- Chair of Materials Engineering of Additive Manufacturing, Technical University of Munich, Munich (DEU)
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- Andersson, Joel, 1981- (författare)
- Högskolan Väst,Avdelningen för svetsteknologi (SV),KAMPT
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- Mayr, Peter (författare)
- Chair of Materials Engineering of Additive Manufacturing,Technical University of Munich, Munich (DEU)
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- Zielińska-Lipiec, Anna (författare)
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Kraków (POL)
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(creator_code:org_t)
- Springer, 2023
- 2023
- Engelska.
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Ingår i: Archives of Civil and Mechanical Engineering. - : Springer. - 1644-9665. ; 23:2
- Relaterad länk:
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https://doi.org/10.1...
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https://hv.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- This work presents the influence of microstructural constituents on liquation crack formation in the cast Ni-based superalloy, René 108. The investigation was divided into three parts: characterisation of the material's microstructure in pre-weld condition, hot ductility studies and analysis of liquation cracking induced by the gas tungsten arc welding process. Using advanced electron microscopy techniques it is shown that the base material in pre-weld condition is characterised by a complex microstructure. The phases identified in René 108 include γ matrix, γ' precipitates, MC and M23C6 carbides, and M5B3 borides. Based on Gleeble testing, it was found that René 108 is characterised by high strength at elevated temperatures with a maximum of 1107 MPa at 975 °C. As a result of constitutional liquation, the superalloy’s strength and ductility were significantly reduced. The nil strength temperature was equal to 1292 °C, while the nil ductility temperature was 1225 °C. The low ductility recovery rate (32.1), ratio of ductility recovery (36.2) and hot cracking factor (Rf = 0.05) values confirmed the low weldability of Renѐ 108. In the heat-affected zone (HAZ) induced by welding, constitutional liquation of mainly γ' precipitates, with a contribution of M23C6 carbides and M5B3 borides, was observed. The thin non-equilibrium liquid film, which formed along high-angle grain boundaries, led to crack initiation and their further propagation during cooling. The eutectic γ–γ' re-solidification products are visible on the crack edges.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Nyckelord
- Constitutional liquation
- Liquation cracking
- Superalloy
- René 108
- STEM
- Production Technology
- Produktionsteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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