Investigation of precipitate in an austenitic ODS steel containing a carbon-rich process control agent

Tim Gräning; Michael Rieth; Anton Möslang; Alexei Kuzmin; Andris Anspoks; Janis Timoshenko; Arturs Cintins; Juris Purans

doi:10.1016/j.nme.2018.05.005

Investigation of precipitate in an austenitic ODS steel containing a carbon-rich process control agent

Tim Gräning, Michael Rieth, Anton Möslang, Alexei Kuzmin, Andris Anspoks, Janis Timoshenko, Arturs Cintins, Juris Purans

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Austenitic oxide dispersion strengthened (ODS) steels are one of the candidates as a structural material for high-temperature applications in future power plants. To guarantee the necessary high production yield, the production process was improved in terms of reproducibility and scalability, by adding a process control agent (PCA) during the milling process. Due to this addition and the inherent change of the production process, the produced powder was thoroughly investigated using transmission electron microscopy and X-ray absorption spectroscopy methods to reveal the formation of chromium-rich carbides adjunct to titanium. Hence, less titanium was available to form the preferred complex nano-oxides the addition of carbon to the system influences the formation of precipitates severely in terms of their amount and size. The mechanical alloying process itself was unaffected by the addition of a PCA, and mixing and alloying of used elements still occurs.

Original language	English
Pages (from-to)	237-243
Number of pages	7
Journal	Nuclear Materials and Energy
Volume	15
DOIs	https://doi.org/10.1016/j.nme.2018.05.005
State	Published - May 2018
Externally published	Yes

Funding

This work has been carried out within the framework of the German Helmholtz Association and has received funding from the topic “Materials Research for the Future Energy Supply”. The work of M. Parish and Rainer Ziegler is gratefully acknowledged. Thanks are also due to the team of the chemical laboratory at the KIT for performing the chemical analysis. The help of the beamline staff at ELETTRA (project 20140052 ) synchrotron radiation facility is acknowledged. We acknowledge support by Deutsche Forschungsgemeinschaft and Open Access Publishing Fund of Karlsruhe Institute of Technology.

Funders	Funder number
Karlsruhe Institute of Technology
Horizon 2020 Framework Programme	739508
Deutsche Forschungsgemeinschaft
Helmholtz Association

Keywords

Austenitic steel
Mechanical alloying
Oxide dispersion strengthened steel
Process control agent
Transmission electron microscopy
X-ray absorption spectroscopy

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10.1016/j.nme.2018.05.005

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title = "Investigation of precipitate in an austenitic ODS steel containing a carbon-rich process control agent",

abstract = "Austenitic oxide dispersion strengthened (ODS) steels are one of the candidates as a structural material for high-temperature applications in future power plants. To guarantee the necessary high production yield, the production process was improved in terms of reproducibility and scalability, by adding a process control agent (PCA) during the milling process. Due to this addition and the inherent change of the production process, the produced powder was thoroughly investigated using transmission electron microscopy and X-ray absorption spectroscopy methods to reveal the formation of chromium-rich carbides adjunct to titanium. Hence, less titanium was available to form the preferred complex nano-oxides the addition of carbon to the system influences the formation of precipitates severely in terms of their amount and size. The mechanical alloying process itself was unaffected by the addition of a PCA, and mixing and alloying of used elements still occurs.",

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AU - Gräning, Tim

AU - Rieth, Michael

AU - Möslang, Anton

AU - Kuzmin, Alexei

AU - Anspoks, Andris

AU - Timoshenko, Janis

AU - Cintins, Arturs

AU - Purans, Juris

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AB - Austenitic oxide dispersion strengthened (ODS) steels are one of the candidates as a structural material for high-temperature applications in future power plants. To guarantee the necessary high production yield, the production process was improved in terms of reproducibility and scalability, by adding a process control agent (PCA) during the milling process. Due to this addition and the inherent change of the production process, the produced powder was thoroughly investigated using transmission electron microscopy and X-ray absorption spectroscopy methods to reveal the formation of chromium-rich carbides adjunct to titanium. Hence, less titanium was available to form the preferred complex nano-oxides the addition of carbon to the system influences the formation of precipitates severely in terms of their amount and size. The mechanical alloying process itself was unaffected by the addition of a PCA, and mixing and alloying of used elements still occurs.

KW - Austenitic steel

KW - Mechanical alloying

KW - Oxide dispersion strengthened steel

KW - Process control agent

KW - Transmission electron microscopy

KW - X-ray absorption spectroscopy

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JF - Nuclear Materials and Energy

ER -

Investigation of precipitate in an austenitic ODS steel containing a carbon-rich process control agent

Abstract

Funding

Keywords

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