کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1886034 | 1533517 | 2015 | 4 صفحه PDF | دانلود رایگان |

• The main defects of low dose irradiated RAFM steels are (He, H)–V complexes.
• H can decrease vacancy defects by forming H–V complexes.
• H can accelerate the formation of (He, H)–V complexes.
• Hardening induced by helium is obviously larger than that induced by hydrogen.
• Hardening reveals the synergistic effects between He and H irradiation.
The reduced activation martensitic steel was irradiated with 250 keV He2+ to 3000 appm and 130 keV H+ to 15,000 appm alone and in sequence at 450 °C. The S–W curve obtained by the positron beam Doppler broadening spectra reveals that (He, H)–V complexes were induced by irradiation. The S parameters show that the H irradiation can decrease defects by forming H–V complexes. The He irradiation can form He–V complexes and the sequentially implanted H can accelerate the formation of (He, H)–V complexes. Hardening induced by He+H sequential irradiation is greater than that by He or H ion irradiation alone, suggesting synergistic effects of He and H on defects and hardening.
Journal: Radiation Physics and Chemistry - Volume 107, February 2015, Pages 19–22