Synergistic effects of hydrogen and helium on microstructural evolution in vanadium alloys by triple ion beam irradiation

Effect of Helium and Hydrogen Production on Irradiation Hardening of F82H Steel Irradiated by Ion Beams

“…Therefore, the enhancement of micro-hardness by the triple ion irradiation in present study might be explained by the formation of lager cavities. The similar effects of enhancement of irradiation hardening 11) and swelling 12,13) due to triple ion beams in the other martensitic steel, 10) vanadium and vanadium alloys 12) and SiC/SiC composites 13) were reported.…”

Displacement and helium-induced enhancement of hydrogen and deuterium retention in ion-irradiated 18Cr10NiTi stainless steel

“…In the latter case the temperature range of deuterium trapping broadens up to $1000 K and exceeds the temperature ranges of retention obtained for other materials [20][21][22][23][24]. It was also seen that high levels of damage induced by self-ions at room temperature were especially effective to trap hydrogen isotopes.…”

“…For example, simultaneous irradiation of self-ions, He + and H + ions was observed to increase swelling strongly in ferritic steel [20] and in vanadium [21]. Hardening in austenitic steel 316 SS [22] is two times higher in comparison with dual irradiation (Fe 3+ , He + or Fe 3+ , H + ) or separately by helium and hydrogen, indicating a strong role of trapping.…”

Materials to deliver the promise of fusion power – progress and challenges

“…At low temperatures, enhanced hardening from He bubbles and the possibility that high helium levels may cause new mechanisms for fracture toughness embrittlement are leading concerns [27,[37][38][39]. Void swelling and phase stability issues (along with possibilities of helium modifications to irradiation creep mechanisms) are major topics at intermediate temperatures [29,30,[40][41][42][43]. In particular, there is concern that void swelling may be maximized near fusion-relevant He/dpa values.…”