Nuclear Techniques ›› 2015, Vol. 38 ›› Issue (12): 120601-120601.doi: 10.11889/j.0253-3219.2015.hjs.38.120601

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Damage mechanism of typical metal engineering materials in fusion reactor under irradiation

TANG Xiaobin1,2 LIU Jian1 CHEN Feida1 HUANG Hai1 LI Huan1 CHEN Da1,2   

  1. 1(Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China) 2(Jiangsu Key Laboratory of Nuclear Energy Equipment Materials Engineering, Nanjing 210016, China)
  • Received:2015-10-09 Revised:2015-11-03 Online:2015-12-10 Published:2015-12-15
  • About author:TANG Xiaobin, male, born in 1978, graduated and awarded a doctoral degree in Nanjing University of Aeronautics and Astronautics in 2009, research area is nuclear energy and nuclear technology engineering
  • Supported by:
    Supported by the Fundamental Research Funds for the Central Universities (No.3082015NJ20150021), the Jiangsu Planned Projects for Postdoctoral Research Funds (No.1401091C), China Postdoctoral Science Foundation (No.2014M561642)

Abstract: Background: It is significant to maintain the safety and reliability of nuclear engineering materials under a neutron irradiation environment. Purpose: This paper aims to investigate the irradiation damage mechanisms of CLAM, F82H and ?-Fe under the bombardment of neutrons, protons and heavy ions respectively with the aspects of material displacement damage rate and impurities deposition. Methods: The model of material damage under irradiation of reactor was established using the Monte Carlo package Geant4. Results: Irradiation damage caused by neutrons was mainly displacement damage. The distribution of displacement damage caused by protons and heavy ions corresponded to Bragg peak curve, whose incident depth and damage area were concentrated in the surface of material. 14.67-MeV protons had an incident depth of 512 ?m while 0.82-MeV 3He ions were 2.1 ?m only. Conclusion: The damage forming mechanism of metal engineering materials under extreme irradiation environment was systematically analyzed, which provided a theoretical basis for further research of material changes of macroscopic properties and microstructure after irradiation.

Key words: Monte Carlo method, Metal engineering materials, Displacement damage rate, Impurities deposition