Irradiation Induced Defects by Fe-Ion in 316L Stainless Steel Studied by Positron Annihilation Spectroscopy

Abstract:

Solution annealed type 316L austenitic stainless steels were irradiated using 2 MeV Fe ions at room temperature. The implanted fluences were 2×10¹² ions/cm² and 1×10¹³ ions/cm², respectively. Variable mono-energetic positron beam was performed to characterize the evolution of microstructure and irradiation induced defects. Results show that large amount of vacancy defects formed after heavy ion irradiation. In which, some of mono-vacancies might migrate to form small-sized clusters at room temperature. After irradiation, implanted Fe atoms mainly be interstitials atoms, but some Fe atoms might recombine with vacancies due to their high mobility, which could decrease the defect concentration, effectively.

• Periodical: Defect and Diffusion Forum (Volume 373)
• Pages: 155-161
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.373.155
• Online since: March 2017
• Authors: Xing Zhong Cao*, Er Yang Lu, Shuo Xue Jin, Yi Hao Gong, Yuan Chao Hu, Te Zhu, Peng Zhang, Long Wei, Bao Yi Wang
• Keywords: 316L, Fe-Ion Irradiation, Irradiation Defects, Positron Annihilation, Vacancy

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