J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (3): 266-274.DOI: 10.1016/j.jmst.2018.07.002

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Designing a high Si reduced activation ferritic/martensitic steel for nuclear power generation by using Calphad method

Chao Liuab, Quanqiang Shia, Wei Yana, Chunguang Shenc, Ke Yanga, Yiyin Shana*(), Mingchun Zhaob*()   

  1. aKey Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
    bSchool of Material Science and Engineering, Central South University, Changsha, 410083, China
    cThe State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110016, China
  • Received:2018-03-08 Revised:2018-07-25 Accepted:2018-07-27 Online:2019-03-15 Published:2019-01-18
  • Contact: Shan Yiyin,Zhao Mingchun
  • About author:

    1 These authors contributed equally to this work.

Abstract:

A high Si reduced activation ferritic/martensitic (RAFM) steel for nuclear structure application is successfully designed by using Calphad method. The main designed chemical composition is C 0.18-0.22%, Cr 10.0-10.5%, W 1.0-1.5%, Si 1.0-1.3%, V+Ta 0.30-0.45%, and Fe in balance. High Si design brings excellent corrosion resistance, while low activation is advantageous in the nuclear waste processing. The experimental results indicate that the newly designed high Si RAFM steel had full martensitic structure and uniformly distributed fine second phase particles, and exhibited excellent mechanical properties and corrosion resistance. Compared to the P91 steel, this new RAFM steel designed by Calphad method is expected to be a promising candidate used in nuclear power generation, which also provides a new and effective approach to the development of RAFM steel for nuclear application.

Key words: Ferritic/martensitic steel, Alloy design, Calphad method, Reduced activation, High silicon