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Publikationer (10 of 177) Visa alla publikationer
Calmunger, M., Wärner, H., Chai, G., Johansson, S. & Moverare, J. (2019). High Temperature Properties of Austenitic Stainless Steels for Future Power Plant Applications. In: : . Paper presented at EUROMAT19, Stockholm 2-5 September 2019.
Öppna denna publikation i ny flik eller fönster >>High Temperature Properties of Austenitic Stainless Steels for Future Power Plant Applications
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2019 (Engelska)Konferensbidrag, Poster (med eller utan abstract) (Refereegranskat)
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:liu:diva-162815 (URN)
Konferens
EUROMAT19, Stockholm 2-5 September 2019
Tillgänglig från: 2019-12-19 Skapad: 2019-12-19 Senast uppdaterad: 2019-12-19
Wärner, H., Eriksson, R., Chai, G., Moverare, J., Johansson, S. & Calmunger, M. (2019). Influence of Ageing on Thermomechaical Fatigue of Austenitic Stainless Steels. In: Elsevier (Ed.), Structural Integrity Procedia: . Paper presented at 9th International Conference on Materials Structures and Micromechanics of Fracture, MSMF9, in Brno, Czech Republic, June 26-28, 2019. Elsevier
Öppna denna publikation i ny flik eller fönster >>Influence of Ageing on Thermomechaical Fatigue of Austenitic Stainless Steels
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2019 (Engelska)Ingår i: Structural Integrity Procedia / [ed] Elsevier, Elsevier, 2019Konferensbidrag, Muntlig presentation med publicerat abstract (Refereegranskat)
Ort, förlag, år, upplaga, sidor
Elsevier, 2019
Nyckelord
Thermomechanical fatigue, Austenitic stainless steels, Ageing, Barrelling effect
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:liu:diva-161737 (URN)
Konferens
9th International Conference on Materials Structures and Micromechanics of Fracture, MSMF9, in Brno, Czech Republic, June 26-28, 2019
Tillgänglig från: 2019-11-08 Skapad: 2019-11-08 Senast uppdaterad: 2019-11-12
Wärner, H., Calmunger, M., Chai, G., Johansson, S. & Moverare, J. (2019). Structural Integrity and Impact Toughness of Austenitic Stainless Steels. In: Proceedings of the 13th International Conference on the Mechanical Behaviour of Materials: . Paper presented at 13th International Conference on the Mechanical Behaviour of Materials (ICM13), 11-14 June 2019, Melbourne, Australia.
Öppna denna publikation i ny flik eller fönster >>Structural Integrity and Impact Toughness of Austenitic Stainless Steels
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2019 (Engelska)Ingår i: Proceedings of the 13th International Conference on the Mechanical Behaviour of Materials, 2019Konferensbidrag, Publicerat paper (Refereegranskat)
Nyckelord
Austenitic stainless steels, long-term ageing, impact toughness, fracture mechanisms
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:liu:diva-162679 (URN)978-1-922016-65-2 (ISBN)
Konferens
13th International Conference on the Mechanical Behaviour of Materials (ICM13), 11-14 June 2019, Melbourne, Australia
Tillgänglig från: 2019-12-16 Skapad: 2019-12-16 Senast uppdaterad: 2019-12-16
Wärner, H., Calmunger, M., Chai, G., Johansson, S. & Moverare, J. (2019). Thermomechanical Fatigue Behaviour of Aged Heat Resistant Austenitic Alloys. International Journal of Fatigue (127), 509-521
Öppna denna publikation i ny flik eller fönster >>Thermomechanical Fatigue Behaviour of Aged Heat Resistant Austenitic Alloys
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2019 (Engelska)Ingår i: International Journal of Fatigue, ISSN 0142-1123, E-ISSN 1879-3452, nr 127, s. 509-521Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The increasing demands for efficiency and flexibility result in more severe operating conditions for the materials used in critical components of biomass power plants. These operating conditions involve higher temperature ranges, more pronounced environmental effects and cyclic operations. Austenitic stainless steels have shown to possess promising high temperature properties which makes them suitable as candidates for critical components in biomass power plant. However, their behaviour under such conditions is not yet fully understood. This work investigates three commercial austenitic alloys: Esshete 1250, Sanicro 25 and Sanicro 31HT. The alloys were subjected to in-phase (IP) thermomechanical fatigue (TMF) testing under strain-control in the temperature range of 100–800 °C. Both virgin and pre-aged TMF specimens were tested in order to simulate service degradation resulting from long-term usage. The results show that the pre-aged specimens suffered shorter TMF-life compared to the virgin specimens. The scanning electron microscopy methods electron backscatter diffraction (EBSD) and energy dispersive spectroscopy (EDS) were used to analyse and discuss active failure and deformation mechanisms. The difference in TMF-life produced by the two testing conditions was attributed to an embrittling effect by precipitation, reduced creep properties and oxidation assisted cracking.

Ort, förlag, år, upplaga, sidor
Elsevier, 2019
Nyckelord
Thermomechanical fatigue, austenitic alloys, pre-ageing
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:liu:diva-159644 (URN)10.1016/j.ijfatigue.2019.06.012 (DOI)000482492600046 ()2-s2.0-85068255817 (Scopus ID)
Anmärkning

Funding agencies: AB Sandvik Materials Technology in Sweden; Swedish Energy Agency through the Research Consortium of Materials Technology for Thermal Energy Processes [KME-701]

Tillgänglig från: 2019-08-14 Skapad: 2019-08-14 Senast uppdaterad: 2019-10-16Bibliografiskt granskad
Zhang, P., Peng, R. L., Li, X.-H. & Johansson, S. (2018). Investigation of Element Effect on High-Temperature Oxidation of HVOF NiCoCrAlX Coatings. Coatings, 8(4), 129-145
Öppna denna publikation i ny flik eller fönster >>Investigation of Element Effect on High-Temperature Oxidation of HVOF NiCoCrAlX Coatings
2018 (Engelska)Ingår i: Coatings, ISSN 2079-6412, Vol. 8, nr 4, s. 129-145Artikel i tidskrift (Refereegranskat) Published
Abstract [sv]

MCrAlX (M: Ni or Co or both, X: minor elements) coatings have been used widely to protect hot components in gas turbines against oxidation and heat corrosion at high temperatures. Understanding the influence of the X-elements on oxidation behavior is important in the design of durable MCrAlX coatings. In this study, NiCoCrAlX coatings doped with Y + Ru and Ce, respectively, were deposited on an Inconel-792 substrate using high velocity oxygen fuel (HVOF). The samples were subjected to isothermal oxidation tests in laboratory air at 900, 1000, and 1100 °C and a cyclic oxidation test between 100 and 1100 °C with a 1-h dwell time at 1100 °C. It was observed that the coating with Ce showed a much higher oxidation rate than the coating with Y + Ru under both isothermal and cyclic oxidation tests. In addition, the Y + Ru-doped coating showed significantly lower β phase depletion due to interdiffusion between the coating and the substrate, resulting from the addition of Ru. Simulation results using a moving phase boundary model and an established oxidation-diffusion model showed that Ru stabilized β grains, which reduced β-depletion of the coating due to substrate interdiffusion. This paper, combining experiment and simulation results, presents a comprehensive study of the influence of Ce and Ru on oxidation behavior, including an investigation of the microstructure evolution in the coating surface and the coating-substrate interface influenced by oxidation time.

Ort, förlag, år, upplaga, sidor
M D P I AG, 2018
Nyckelord
MCrAlX coatings, Ruthenium, Cerium, Oxidation, Simulation
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:liu:diva-148278 (URN)10.3390/coatings8040129 (DOI)000435187300014 ()
Forskningsfinansiär
EnergimyndighetenLinköpings universitet
Anmärkning

Funding agencies: Carl Tryggers Stifelsen [CTS16:207]; Swedish Research Council [VR-2014-3079]; Erling-Persson Family Foundation [2017-10-09]; Promobilia Foundation [F17603]

Tillgänglig från: 2018-06-05 Skapad: 2018-06-05 Senast uppdaterad: 2019-11-04Bibliografiskt granskad
Calmunger, M., Chai, G., Eriksson, R., Johansson, S. & Moverare, J. J. (2017). Characterization of austenitic stainless steels deformed at elevated temperature. Metallurgical and Materials Transactions. A, 48A(10), 4525-4538
Öppna denna publikation i ny flik eller fönster >>Characterization of austenitic stainless steels deformed at elevated temperature
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2017 (Engelska)Ingår i: Metallurgical and Materials Transactions. A, ISSN 1073-5623, E-ISSN 1543-1940, Vol. 48A, nr 10, s. 4525-4538Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Highly alloyed austenitic stainless steels are promising candidates to replace more expansive nickel-based alloys within the energy-producing industry. The present study investigates the deformation mechanisms by microstructural characterisation, mechanical properties and stress-strain response of three commercial austenitic stainless steels and two commercial nickel-based alloys using uniaxial tensile tests at elevated temperatures from 400 C up to 700 C. The materials showed different influence of temperature on ductility, where the ductility at elevated temperatures increased with increasing nickel and solid solution hardening element content. The investigated materials showed planar dislocation driven deformation at elevated temperature. Scanning electron microscopy showed that deformation twins were an active deformation mechanism in austenitic stainless steels during tensile deformation at elevated temperatures up to 700 C.

Ort, förlag, år, upplaga, sidor
Springer-Verlag New York, 2017
Nyckelord
Austenitic stainless steel, Nickel-based alloy, Microstructural characterization, Deformation twinning, Stress-strain response
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:liu:diva-122942 (URN)10.1007/s11661-017-4212-9 (DOI)000408884300012 ()
Anmärkning

Previous status of this publication was manuscript

Funding agencies: AB Sandvik Materials Technology in Sweden; Swedish National Energy Administration through the Research Consortium of Materials Technology for Thermal Energy Processes [KME-701]; AFM Strategic Faculty Grant SFO-MAT-LiU at Linkoping University [2009-00971]

Tillgänglig från: 2015-11-30 Skapad: 2015-11-30 Senast uppdaterad: 2017-09-22Bibliografiskt granskad
Chen, Z., Peng, R. L., Zhou, J., Bushlya, V., Saoubi, R. M., Johansson, S. & Moverare, J. (2017). Effect of Cutting Conditions on Machinability of AD 730 TM during High Speed Turning with PCBN Tools. In: : . Paper presented at EUROMAT17, Thessaloniki 17-21 September 2017,Greece (pp. 1-1).
Öppna denna publikation i ny flik eller fönster >>Effect of Cutting Conditions on Machinability of AD 730 TM during High Speed Turning with PCBN Tools
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2017 (Engelska)Konferensbidrag, Muntlig presentation med publicerat abstract (Refereegranskat)
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:liu:diva-143973 (URN)
Konferens
EUROMAT17, Thessaloniki 17-21 September 2017,Greece
Tillgänglig från: 2018-01-01 Skapad: 2018-01-01 Senast uppdaterad: 2018-08-02Bibliografiskt granskad
Zhang, P., Peng, R. L., Li, X.-H. & Johansson, S. (2017). Hot Corrosion Behavior of HVOF CoNiCrAlY(Hf) Coating on Ni-based Superalloys. In: : . Paper presented at EUROMAT17, Thessaloniki 17-21 September 2017,Greece (pp. 1-1).
Öppna denna publikation i ny flik eller fönster >>Hot Corrosion Behavior of HVOF CoNiCrAlY(Hf) Coating on Ni-based Superalloys
2017 (Engelska)Konferensbidrag, Muntlig presentation med publicerat abstract (Refereegranskat)
Nyckelord
MCrAlY, Hot Corrosion, Reactive Element, Hafnium
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:liu:diva-143974 (URN)
Konferens
EUROMAT17, Thessaloniki 17-21 September 2017,Greece
Tillgänglig från: 2018-01-01 Skapad: 2018-01-01 Senast uppdaterad: 2018-01-16Bibliografiskt granskad
Calmunger, M., Eriksson, R., Chai, G., Johansson, S. & Moverare, J. (2017). Influence of Cyclic Oxidation in Moist Air on Surface Oxidation-Affected Zones. In: : . Paper presented at EUROMAT17, Thessaloniki 17-21 September 2017,Greece (pp. 1-1).
Öppna denna publikation i ny flik eller fönster >>Influence of Cyclic Oxidation in Moist Air on Surface Oxidation-Affected Zones
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2017 (Engelska)Konferensbidrag, Muntlig presentation med publicerat abstract (Refereegranskat)
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:liu:diva-143972 (URN)
Konferens
EUROMAT17, Thessaloniki 17-21 September 2017,Greece
Tillgänglig från: 2018-01-01 Skapad: 2018-01-01 Senast uppdaterad: 2018-01-16Bibliografiskt granskad
Zhang, P., Sadeghimeresht, E., Peng, R. L., Li, X.-H., Markocsan, N., Joshi, S. & Johansson, S. (2017). Isothermal oxidation behavior of HVAF-sprayed NiCoCrAlY coatings: Effect of surface treatment. In: Proceedings of International Thermal Sprayed Conference (ITSC), May 7-9,Germany, 456-461 (2017): . Paper presented at International Thermal Spray Conference & Exposition, ITSC 2017, Düsseldorf, Germany, June 7-9, 2017 (pp. 456-461).
Öppna denna publikation i ny flik eller fönster >>Isothermal oxidation behavior of HVAF-sprayed NiCoCrAlY coatings: Effect of surface treatment
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2017 (Engelska)Ingår i: Proceedings of International Thermal Sprayed Conference (ITSC), May 7-9,Germany, 456-461 (2017), 2017, s. 456-461Konferensbidrag, Enbart muntlig presentation (Övrigt vetenskapligt)
Abstract [en]

NiCoCrAlY coatings are widely used as bond coats for ceramic thermal barrier coatings (TBCs) andoxidation and corrosion protective overlay coatings in industrial gas turbines. High temperature oxidation behaviour of NiCoCrAlYs has a great influence on the coating performance and lifetime of TBCs. A promising route to decrease the oxidation rate of such coatings is post-coating surface modification which can facilitate formation of a uniform alumina scale with a considerably slower growth rate compared to the as-sprayed coatings. In this work, the effect of surface treatment by means of shot peening and laser surface melting (LSM) on the oxidation resistance of high velocity air-fuel (HVAF) sprayed NiCoCrAlY coatings was studied. Isothermal oxidation was carried out at 1000⁰C for 1000h. Results showed that the rough surface of as-sprayed HVAF sprayed coatings was significantly changed after shot peening and LSM treatment, with a compact and smooth appearance. After the exposure, the oxide scales formed on surface-treated NiCoCrAlY coatings showed different morphology and growth rate compared to those formed on as-sprayed coating surface. The oxidation behaviour of surface treated HVAF-sprayed NiCoCrAlY coatings were revealed and discussed.

Nyckelord
Surface treatment, shot peening, Laser Surface Melting (LSM), High Velocity Air-Fuel (HVAF), NiCoCrAlY coating
Nationell ämneskategori
Bearbetnings-, yt- och fogningsteknik Keramteknik
Identifikatorer
urn:nbn:se:liu:diva-145094 (URN)
Konferens
International Thermal Spray Conference & Exposition, ITSC 2017, Düsseldorf, Germany, June 7-9, 2017
Tillgänglig från: 2017-12-28 Skapad: 2018-02-09 Senast uppdaterad: 2018-02-09
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