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首页> 外文期刊>Philosophical Magazine Letters >Formation of Cu precipitates and vacancy clusters in neutron-irradiated Fe-Cu alloys
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Formation of Cu precipitates and vacancy clusters in neutron-irradiated Fe-Cu alloys

机译：中子辐照Fe-Cu合金中Cu沉淀物的形成和空位团簇

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摘要

Two Fe-Cu binary model alloys, Fe-0.3Cu and Fe-0.6Cu, were irradiated with fission neutrons at doses ranging from 4 x 10~(-6) to 0.16dpa (displacements per atom) at approx 573 KAPPA to investigate the formation of Cu precipitates and microstructural evolution. The Cu content only affected the formation of Cu precipitates and microvoids at low doses. In Fe-0.3Cu, the formation of microvoids and Cu precipitates initiated at doses of 1.2 x 10~(-4) and 4 x l0~(-5)dpa, respectively. On the other hand, the formation of microvoids started at a dose of 4 x 10~(-4)dpa in Fe-0.6Cu, and Cu precipitates were formed even after irradiation to 4 x 10~(-6)dpa. On further irradiation, the difference in the formation of Cu precipitates and microvoids was small. Microvoids grew with increasing irradiation dose up to 3 x 10~(-3)dpa in both alloys. Prominent aggregation of Cu atoms occurred upon irradiation from 3x 10~(-3) to 1.6 x l0~(-2)dpa and the microvoids shrank. The Cu precipitates no longer grew, and microvoids nucleated and grew in the matrix above a dose of 1.6 x 10~(-2)dpa in both alloys. The present studies clearly reveal the relationships between the formation and growth of Cu precipitates and microvoids with irradiation dose.
机译：用裂变中子以大约573 KAPPA的剂量范围从4 x 10〜（-6）到0.16dpa（每个原子的位移）辐照两种Fe-Cu二元模型合金Fe-0.3Cu和Fe-0.6Cu。铜沉淀的形成和微观结构的演变。低剂量时，铜含量仅影响铜沉淀物和微孔的形成。在Fe-0.3Cu中，分别以1.2 x 10〜（-4）dpa和4 x 10〜（-5）dpa的剂量开始形成微孔和Cu沉淀。另一方面，在Fe-0.6Cu中以4×10〜（-4）dpa的剂量开始形成微孔，并且甚至在辐射至4×10〜（-6）dpa之后也形成Cu沉淀。进一步照射后，Cu沉淀物和微孔形成的差异很小。在两种合金中，微孔随着辐照剂量的增加而增长，最高可达3 x 10〜（-3）dpa。从3×10〜（-3）dpa照射到1.6×10〜（-2）dpa时，Cu原子明显聚集，微孔收缩。在两种合金中，Cu沉淀物不再生长，并且微孔中的微孔形核并生长，其剂量超过1.6 x 10〜（-2）dpa。本研究清楚地揭示了铜沉淀物和微孔的形成和生长与辐射剂量之间的关系。

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