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Precipitation of Nanosized MX at Coherent Cu-Rich Phases in Super304H Austenitic Steel

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Abstract

The present investigation of transmission electron microscopy reports the precipitation of nanosized and cubical-shaped incoherent Nb-rich MX at the coherent Cu-rich phases in the austenitic matrix of the Super304H steel. In addition, the nanosized Nb-rich MX phases were often observed to precipitate on dislocations during creep. It is concluded that the dense incoherent Nb-rich MX and coherent Cu-rich precipitates with a nanosized diameter contribute excellent creep resistance in the steel.

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This research was financially supported by the NSFC under Contract no. 50931003 and by the SSTC under Contract no. 13dz2260300.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai, 200240, People’s Republic of China

    Ping Ou (Ph.D. Student), Hui Xing (Assistant Professor) & Jian Sun (Professor, Principal Researcher)

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  1. Ping Ou
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  2. Hui Xing
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  3. Jian Sun
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Correspondence to Jian Sun.

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Manuscript submitted July 2, 2014.

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Ou, P., Xing, H. & Sun, J. Precipitation of Nanosized MX at Coherent Cu-Rich Phases in Super304H Austenitic Steel. Metall Mater Trans A 46, 1–5 (2015). https://doi.org/10.1007/s11661-014-2628-z

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