两类钒基合金的辐照硬化研究

颜廷星; 杨义涛; 马通达; 张崇宏; 范嘉琪; 丁兆楠; 宋银

doi:10.11889/j.0253-3219.2017.hjs.40.030203

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两类钒基合金的辐照硬化研究

低能加速器技术、射线技术及应用 | 更新时间：2021-05-19

- 两类钒基合金的辐照硬化研究
- Ion-irradiation-induced hardening in alloys of V-4Cr-4Ti and V-5Cr-5Ti
- 核技术 2017年40卷第3期文章编号：030203
- 作者机构：
  
  1.中国科学院近代物理研究所兰州 730000
  2.中国科学院大学北京 100049
  3.北京有色金属研究总院国家有色金属及电子材料分析测试中心北京 100088
- 作者简介：
  
  [ "颜廷星, 男, 1990年出生, 2014年毕业于云南大学, 现为硕士研究生, 从事反应堆材料辐照损伤效应研究", "YAN Tingxing, male, born in 1990, graduated from Yunnan University in 2014, master student, engaged in the study of radiation damage effect of reactor materials" ]
  张崇宏, E-mail:c.h.zhang@impcas.ac.cn ZHANG Chonghong, E-mail:c.h.zhang@impcas.ac.cn
- 基金信息：
  
  国家自然科学基金委大科学装置联合基金(U1532262);国家磁约束核聚变能研究发展计划专项(2011GB108003)
- DOI：10.11889/j.0253-3219.2017.hjs.40.030203
  中图分类号： TL99
- 收稿日期：2016-10-09，
  
  修回日期：2016-11-08，
  
  纸质出版日期：2017-03-10
- 稿件说明：
移动端阅览
颜廷星, 杨义涛, 马通达, 等. 两类钒基合金的辐照硬化研究[J]. 核技术, 2017,40(3):030203

Tingxing YAN, Yitao YANG, Tongda MA, et al. Ion-irradiation-induced hardening in alloys of V-4Cr-4Ti and V-5Cr-5Ti[J]. Nuclear techniques, 2017, 40(3): 030203
颜廷星, 杨义涛, 马通达, 等. 两类钒基合金的辐照硬化研究[J]. 核技术, 2017,40(3):030203 DOI： 10.11889/j.0253-3219.2017.hjs.40.030203.

Tingxing YAN, Yitao YANG, Tongda MA, et al. Ion-irradiation-induced hardening in alloys of V-4Cr-4Ti and V-5Cr-5Ti[J]. Nuclear techniques, 2017, 40(3): 030203 DOI： 10.11889/j.0253-3219.2017.hjs.40.030203.

摘要

钒合金（V-Cr-Ti系列）是重要的聚变堆结构候选材料，但是相比于铁素体/马氏体钢等其他候选材料，有关钒合金（V-Cr-Ti）的辐照损伤研究较为缺乏。利用载能离子束模拟聚变堆中子辐照条件，对V-4Cr-4Ti和V-5Cr-5Ti两种样品进行了载能He离子和重离子辐照实验。实验采用离子束梯度减能方法在样品中产生辐照损伤的坪区，利用纳米压痕技术测试材料的辐照硬化效应。结果表明，样品纳米硬度的深度递减现象可以用Nix-Gao模型很好描述，高能重离子辐照的样品中软基体效应可以有效避免；在He离子辐照情形，He浓度（以原子百万分率计（Atomic parts per million，APPM））/位移损伤（以每原子平均离位数计（Displacement per atom，DPA））大于4 200/0.2时，两种钒合金样品出现硬化饱和现象；相近位移损伤水平下，He与空位的结合导致缺陷集团的加速长大，致使材料的辐照硬化远大于重离子辐照情形。

Abstract

Background

Vanadium alloy (V-Cr-Ti) is an important fusion reactor candidate material due to its low activation characteristics

desirable high-temperature strength and good resistance to radiation damage. However

studies at lower temperature have shown a substantially reduced radiation resistance

manifested in a loss of ductility and enhanced hardening.

Purpose

This work aims to investigate the irradiation hardening behavior of vanadium alloys under He-ion implantation and displacement damage

and provide an experimental evidence for optimizing the radiation resistance of vanadium alloys.

Methods

In this study

irradiation of V-4Cr-4Ti alloy and V-5Cr-5Ti alloy samples were carried out with He-ions and swift-heavy-ions. A thick layer with a uniform damage distribution in samples was produced by varying energy of He ions

or by using an energy degrade wheel for swift-heavy-ion irradiation. The nanoindentation technique was used to measure the irradiation hardening. Cross-sectional transmission electron microscopy (TEM) sample fabricated from the irradiated samples were investigated with TEM.

Results

The results show that the hardening saturation occurs when the dose of He-ion implantation is more than 4 200 (Atomic parts per million

APPM)/0.2 (Displacement per atom

DPA). The irradiation hardening by He-ions is far larger than that by the swift-heavy-ions at the same displacement damage level.

Conclusion

The phenomenon of the enhanced hardening by He-ions can be attributed to the accelerated formation of defect clusters due to the combination of He-atoms and vacancies.

关键词

Keywords

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