Dynamic evolution of polyhedral bubbles in Fe9Cr1.5W0.4Si F/M steel under 30keV H2+& He+ synergetic irradiation
Source abstract
Abstract
Large polygon bubbles can cause significant swelling and embrittlement in irradiated materials. Understanding their formation and growth process is thus important to alleviate the mechanical property degradation of nuclear materials. Here, based on in-situ 30 keV H 2 + and He + synergetic irradiation in Fe9Cr1.5W0.4Si ferritic/martensitic steels, polygonal bubble evolution was investigated at grain boundaries, matrix-precipitate interfaces and matrices. Two threshold sizes were first found for bubble growth in the matrix. One determined the shape between sphere and rectangle, while the other determined whether growth was continuous or reached a saturation size. Large polygonal bubbles formed at interfaces due to abnormal growth rates and coalescence between bubbles. Finally, the bubble growth at sinks and matrices was explained using a bubble growth rate model.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fusion materials and technologies · Nuclear Materials and Properties · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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