Subcascade formation ratio in neutron-irradiated stainless steels

The International Workshop on Positron Studies of Defects 2014

Yoshiie, T.^1 ; Satoh, Y.^2 ; Huang, S.S.^1 ; Horiki, M.^1 ; Sato, K.^1 ; Xu, Q.^1

Research Reactor Institute, Kyoto University, Kumatori, Osaka, Japan^1

Institute for Materials Research, Tohoku University, Sendai, Japan^2

关键词: Cascade damage;    Ferritic/martensitic;    High-energy particle irradiation;    Model alloys;    Neutron irradiated;    Particle energy;    Positron annihilation lifetime spectroscopy;    Vacancy cluster;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/674/1/012002/pdf
DOI  :  10.1088/1742-6596/674/1/012002

来源: IOP

【 摘 要 】

High-energy-particle irradiation in metals produces cascade damage. If the particle energy is high enough, a cascade is divided into subcascades. In each subcascade, a vacancy rich area is surrounded by an interstitial area. Vacancy clusters are expected to form directly in the vacancy rich area. In this study, the vacancy cluster formation ratio in subcascades was estimated by positron annihilation lifetime spectroscopy and transmission electron microscopy in commercial stainless steels and their model alloys. The vacancy cluster formation ratio was 1.7x10-3and 9.1x10-5in austenitic stainless steel and ferritic/martensitic stainless steel, respectively.