Article

Science China Physics, Mechanics and Astronomy

, Volume 55, Issue 11, pp 2057-2061

Mechanical property and irradiation damage of China Low Activation Martensitic (CLAM) steel

  • YanYong ZhuAffiliated withDepartment of Materials Physics and Chemistry, University of Science and Technology BeijingCentral Iron and Steel Research Institute
  • , FaRong WanAffiliated withDepartment of Materials Physics and Chemistry, University of Science and Technology Beijing Email author 
  • , Jin GaoAffiliated withDepartment of Materials Physics and Chemistry, University of Science and Technology Beijing
  • , WenTuo HanAffiliated withDepartment of Materials Physics and Chemistry, University of Science and Technology Beijing
  • , YiNa HuangAffiliated withDepartment of Materials Physics and Chemistry, University of Science and Technology BeijingDepartment of Engineering Physics, University of Wisconsin
  • , ShaoNing JiangAffiliated withDepartment of Materials Physics and Chemistry, University of Science and Technology Beijing
  • , JianSheng QiaoAffiliated withDepartment of Materials Physics and Chemistry, University of Science and Technology BeijingChina Institute of Atomic Energy
  • , Fei ZhaoAffiliated withDepartment of Materials Physics and Chemistry, University of Science and Technology BeijingDepartment of Material Physics, Guizhou University
  • , ShanWu YangAffiliated withDepartment of Materials Physics and Chemistry, University of Science and Technology Beijing
    • , Somei OhnukiAffiliated withFaculty of Engineering, Hokkaido University
    • , Naoyuki HashimotoAffiliated withFaculty of Engineering, Hokkaido University

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Abstract

China Low Activation Martensitic (CLAM) steel is being studied to develop the structural materials for a fusion reactor, which has been designed based on the well-known 9Cr1.5WVTa steel. The effect of tempering temperature on hardness and microstructure of CLAM steel was studied. The strength of CLAM steel increased by adding silicon, and the ductility remained constant. Conversely, while CLAM steel maintained good ductility with the addition of yttrium, its tensile strengths were greatly degraded. Behaviors under electron irradiation of CLAM steel were examined using the high voltage electron microscope. Electron irradiation at 450°C formed many voids in CLAM steel with basic composition, whereas CLAM with silicon steel did not change the microstructure significantly.

Keywords

low activation ferritic/martensitic steel mechanical property electron irradiation irradiation damage silicon yttrium