Microstructure and Tensile Properties of ODS Ferritic Steels Produced by Mechanical Alloying in Argon and Hydrogen Gas Environments

Author:

Iwata Noriyuki Y.1,Kasada Ryuta1,Kimura Akihiko1,Okuda Takanari2,Inoue Masaki3,Abe Fujio4,Ukai Shigeharu5,Ohnuki Somei5,Fujisawa Toshiharu6

Affiliation:

1. Kyoto University

2. Kobelco Research Institute,Inc.

3. Japan Atomic Energy Agency

4. National Institute for Materials Science (NIMS)

5. Hokkaido University

6. Nagoya University

Abstract

Two types of oxide dispersion strengthened (ODS) ferritic steels have been produced by mechanical alloying (MA) either in argon or in hydrogen atmosphere, and vacuum hot pressing (VHP). A drastic reduction in the oxygen and nitrogen contents after VHP was strongly affected by hydrogen gas used as the MA atmosphere. MA in hydrogen was found to be effective for refining the steel matrix and enhancing the tensile ductility of the ODS ferritic steels.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

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