Effects of Ion Irradiation on Laser Welded V-4Cr-4Ti Alloy

离子辐照对激光焊接V-4Cr-4Ti合金的影响

• 批准号: 15560717
• 负责人: WATANABE Hideo
• 金额: $ 2.11万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560717/
• 关键词: Low activation alloy; Vanadium alloy; Electron Microscopy; Titanium oxides; Laser Welding; Ion Irradiation; Neutron Irradiation; レーザ溶接; 材料開発; 溶接; 溶融部; 転位密度; 転位ループ

High purity V-4Cr-4Ti alloy, fabricated by National Institute for Fusion Science (NIFS), was used for this study. The samples were annealed at 1273K for 2 hours and bead-on-plate welds were performed using high purity argon gas. A 2.4MeV copper ion irradiation was carried out with the tandem accelerator at Kyushu University. The TEM samples were sliced from the welded materials and irradiated at 573K and 873K up to the dose of 12 dpa. The microstructure before irradiation showed that relatively large Ti(C, O, N) precipitates which were commonly observed in V-4Cr-4Ti alloy disappeared in the center of weld metal. After the ion irradiation at 873K, fine titanium oxides with {100} habit plane were detected at the dose of 0.75 dpa. Lower number density of the oxides was observed in the base metal after the same irradiation conditions. This means that the contribution of oxygen atoms, which dissolved from the large precipitates during the laser welding, is essential to the microstructural evolution of welded V-4Cr-4Ti alloys.

采用美国国家聚变科学研究所（NIFS）生产的高纯度V-4Cr-4 Ti合金作为研究对象。样品在1273 K下退火2小时，并使用高纯氩气进行板上焊道焊接。用九州大学串列加速器进行了2.4MeV铜离子辐照。从焊接材料上切下TEM样品，并在573 K和873 K下辐照，剂量为12 dpa。辐照前的显微组织表明，V-4Cr-4 Ti合金中常见的较大的Ti（C，O，N）析出相在焊缝中心消失。在873 K下进行离子辐照后，在0.75dpa的剂量下检测到具有{100}惯习面的精细氧化钛。在相同的辐照条件下，在基体金属中观察到较低的氧化物数密度。这意味着在激光焊接过程中从大的析出物中溶解的氧原子对焊接的V-4Cr-4 Ti合金的显微组织演变的贡献是必不可少的。

项目成果

The Study of Temperature Variation During HFIR Irradiation on Vanadium

钒高频红外辐射过程中温度变化的研究

• 发表时间: 2004
• 期刊: Journal of Nuclear Materials 329-333
• 作者: T Nagasaka et al.;H.Watanabe et al.;T.Nagasaka et al.;Y.Sumino;H.Watanabe;H.Watanabe et al.;T.Nagasaka et al.;M.Hatakeyama et al.;H.Watanabe et al.
• 通讯作者: H.Watanabe et al.

The Microstructure of Laser Welded V-4Cr-4Ti Alloy after Ion irradiation

激光焊接V-4Cr-4Ti合金离子辐照后的显微组织

• 发表时间: 2005
• 期刊: Materials Science Forum 475-479
• 作者: T Nagasaka et al.;H.Watanabe et al.;T.Nagasaka et al.;Y.Sumino;H.Watanabe
• 通讯作者: H.Watanabe

T.Muroga: "Summary of the Varying Temperature Irradiation in HFIR"Fusion Science and Technology. 44. 450-454 (2003)

T.Muroga：“HFIR 中的变温辐照概述”聚变科学与技术。

オーステナイト鋼のミクロ組織発達に関する温度変動照射実験の最近の成果

奥氏体钢显微组织发展的温度波动辐照实验的最新结果

• 发表时间: 2004
• 期刊: プラズマ核融合学会誌 6
• 作者: T Nagasaka et al.;H.Watanabe et al.;T.Nagasaka et al.;Y.Sumino;H.Watanabe;H.Watanabe et al.;T.Nagasaka et al.;M.Hatakeyama et al.;H.Watanabe et al.;渡辺英雄
• 通讯作者: 渡辺英雄

Nam-Jin Heo: "Mechanical Properties of Laser Weldment of V-4Cr-4Ti Alloy"Fusion Science and Technology. 44. 470-474 (2003)

Nam-Jin Heo：“V-4Cr-4Ti合金激光焊接的力学性能”融合科学与技术。