Zr-Sn-Nb合金包壳管真空环向力学性能研究

闫萌; 李顺平; 王朋飞; 洪晓峰; 梁波; 戴训; 尹祁伟

doi:10.13832/j.jnpe.2023.03.0127

Zr-Sn-Nb合金包壳管真空环向力学性能研究

doi: 10.13832/j.jnpe.2023.03.0127

闫萌^1,,
李顺平^{1, 2, ,},
王朋飞¹,
洪晓峰¹,
梁波¹,
戴训¹,
尹祁伟¹

1.
中国核动力研究设计院，成都，610213
2.
西南交通大学材料科学与工程学院，成都，610031

详细信息

作者简介:
闫　萌（1987—），女，副研究员，现主要从事核结构材料力学性能的研究，E-mail: l397552724@qq.com

通讯作者:
李顺平，E-mail: lsp511@163.com

中图分类号: TL341
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- 文章访问数: 209
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- 被引次数: 0
出版历程
- 收稿日期: 2022-06-20
- 修回日期: 2023-03-30
- 刊出日期: 2023-06-15

Research on Hoop Mechanical Property of Zr-Sn-Nb Alloy Cladding Tubes in Vacuum

1.
Nuclear Power Institute of China, Chengdu, 610213, China
2.
School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China

摘要

摘要: 目前关于小尺寸管材环向拉伸的方法没有标准可参考，国内外锆合金包壳管环向拉伸研究方法也不统一，对于国产Zr-Sn-Nb合金包壳管，环向力学性能尚处于空白。本文采用带标距的环形试样，获得了Zr-Sn-Nb合金包壳管真空环向拉伸力学性能数据。结果表明：室温至600℃ 时，环向拉伸强度和延伸率均随温度上升而下降，但在300~400℃ 之间受动态应变时效的影响环向拉伸强度出现不随温度变化的平台段，相同温度条件下，真空环向拉伸强度低于轴向拉伸，差距随着温度升高而扩大；550℃和600℃时，受动态再结晶的影响环向拉伸曲线发生波浪式抖动；不同温度断口特征差异明显，说明环向拉伸断裂形式严重依赖试样变形温度。
- Zr-Sn-Nb合金 /
- 真空环向拉伸 /
- 动态应变时效
Abstract: At present, there is no reference standard for hoop tensile testing of small-diameter tubes and there is also no uniform research method for hoop tensile testing of zirconium alloy cladding tubes in the worldwide research field. As to home-made Zr-Sn-Nb alloy cladding tubes, there is no data in hoop mechanical property. In this paper, the hoop tensile mechanical properties of Zr-Sn-Nb alloy cladding tubes in vacuum were obtained by using the hoop specimen with a gauge section. The results show that hoop tensile strengths and elongations dropped with temperature rise from room temperature to 600℃, but there is an abnormal phenomenon with flat stage in strength at 300-400℃ due to the influence of the dynamic strain aging, the hoop tensile strengths are lower than the axial tensile strengths at the same temperature in vacuum, and the gap widened as the temperature increased; the hoop tensile curve at 550℃ and 600℃ jitters wavelike due to the influence of dynamic recrystallization; the fracture characteristics vary significantly at different temperatures, indicating that the hoop tensile fracture mode depended on the temperature heavily.
- Zr-Sn-Nb alloy /
- Hoop tensile in vacuum /
- Dynamic stain aging

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图 1 环形试样示意图

Figure 1. Schematic Diagram of Hoop Sample

下载: 全尺寸图片幻灯片

图 2 Zr-Sn-Nb合金包壳管环向拉伸应力-应变曲线

Figure 2. Stress-strain Curves of Hoop Tensile Testing on Zr-Sn-Nb Alloy Cladding Tubes

下载: 全尺寸图片幻灯片

图 3 Zr-Sn-Nb合金包壳管环向拉伸抗拉强度与温度的关系　　　　　　

Figure 3. Relations of Hoop Tensile Strength and Temperature on Zr-Sn-Nb Alloy Cladding Tubes

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图 4 Zr-Sn-Nb合金包壳管环向拉伸延伸率与温度的关系

Figure 4. Relations of Hoop Tensile Elongation and Temperature on Zr-Sn-Nb Alloy Cladding Tubes

下载: 全尺寸图片幻灯片

图 5 550℃和600℃时Zr-Sn-Nb合金包壳管环向拉伸应力-应变曲线

Figure 5. Stress-strain Curves of of Hoop Tensile Testing on Zr-Sn-Nb Alloy Cladding Tubes at 550℃ and 600℃

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图 6 不同温度下的环向拉伸断口形貌

Figure 6. Fracture Mophologies of Hoop Tensile Samples under Different Temperature

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表 1 Zr-Sn-Nb合金包壳管轴向与环向抗拉强度比较

Table 1. Hoop Tensile Strength Comparison on Axial and Hoop Direction of Zr-Sn-Nb Alloy Cladding Tubes

温度/℃ 轴向抗拉强度/MPa 环向抗拉强度/MPa

25 507 485
200 323 290
300 282 260
350 260 250
375 250
400 245 220
450 215 183
500 175 141
550 133 100
600 99 65

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参考文献(11)

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