The purity is one of the key issues in the development of low-activation ferritic steels for fusion applications to reduce the concentration of highly radioactive elements. In this work a high-purity Fe-9Cr alloy and impurity-doped alloys were prepared from an ultra-high-purity iron and high-purity elements using an advanced arc-melting technique. In order to study the influence of helium on microstructural evolution, helium ions were implanted into the alloys up to 1000 at ppm by an accelerator, and then TEM observation was carried out after annealing. The growth of cavities in a sulfur-doped alloy was much larger than that in the high-purity one. The role of trace impurity elements in the helium effect is discussed.
|ジャーナル||Physica Status Solidi (A) Applied Research|
|出版ステータス||Published - 1998 1月 1|
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