Development of ODS Vanadium Alloy and Irradiation Effects on Its Properties.
Development of ODS Vanadium Alloy and Irradiation Effects on Its Properties.
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ODS钒合金的研制及辐照对其性能的影响。
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
H. Kayano
中科院分区：
文献类型：
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作者：
K. Nakajima;T. Shibayama;H. Kayano
研究成功了一种制备氧化物弥散强化（ODS）钒合金的机械弥散新工艺。为了研究辐照对ODS V合金和非合金V组织演变的影响，对ODS V合金进行了透射电镜观察和维氏硬度测试。ODS V合金的显微硬度是纯V的5倍，具有孪晶结构。在813 K下，用3MeV的Au~（2+）离子以1.5 × 10~（20）ions/mm~2（约60dpa）辐照纯V，观察到微晶转变和缺陷团簇。当辐照剂量达到6.0x 1020 ions/mm~2（约250 dpa）时，未合金化的V中出现大量的微孔，而ODS V合金中的孪晶结构消失。而ODS V合金中未观察到孔洞。纯钒经8.3 × 10~（22）n/mm~2（En> 1MeV，144h）中子辐照后，观察到退火硬化现象。然而，在ODS V合金中没有观察到辐射退火硬化。因此，ODS V合金具有显著的抗辐照损伤能力。
A new mechanical dispersion process to produce oxide dispersion strengthened (ODS) vanadium alloy has been successfully developed. In order to study effects of irradiation on microstructural evolution in ODS V alloy and unalloyed V, transmission electron microscopy observation and Vickers microhardness test were performed. ODS V alloy has five times as large Vickers microhardness as unalloyed V. ODS V alloy has twin structure. After irradiated with 3 MeV Au2+ ions up to 1.5×1020 ions/mm2 (about 60dpa) at 813 K, microcrystalline transformation and defect clusters were observed in unalloyed V. On the other hand, the twin structure was stable in ODS V alloy. After irradiated up to 6.Ox1020 ions/mm2 (about 250 dpa), many microvoids were observed in unalloyed V, while the twin structure in ODS V alloy was disappeared. However no voids could be observed in ODS V alloy. Postirradiation anneal hardening was observed in unalloyed V after irradiated by neutrons up to 8.3×1022n/mm2(En> 1 MeV, 144 h). Nevertheless no radiation anneal hardening could be observed in ODS V alloy. Therefore ODS V alloy has a significant resistance to irradiation damage.