7075铝合金的Fe<sup>11+</sup>离子辐照损伤研究

郭义盼; 苏洋帆; 张同林; 常浩刚; 王溪源

doi:10.11884/HPLPB202335.230154

7075铝合金的Fe¹¹⁺离子辐照损伤研究

doi: 10.11884/HPLPB202335.230154

1.
南京航空航天大学航天学院，南京 210016
2.
南京航空航天大学空间光电探测与感知工业和信息化部重点实验室，南京 210016

基金项目: 南京航空航天大学工业和信息化部重点实验室开放课题（NJ2022025-7）；中央高校基本科研业务费专项资金项目（NJ2022025）

详细信息

作者简介:
郭义盼，guoyipan@nuaa.edu.cn

中图分类号: O77⁺4；TG139⁺.4；O483
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- 被引次数: 0
出版历程
- 收稿日期: 2023-05-30
- 修回日期: 2023-09-17
- 录用日期: 2023-09-05
- 网络出版日期: 2023-09-23
- 刊出日期: 2023-10-08

Study on Fe¹¹⁺ ion irradiation damage of 7075 aluminum alloy

1.
School of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
2.
Key Laboratory of Space Photoelectric Detection and Perception of Ministry of Industry and Information Technology, School of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

摘要

摘要: 7075铝合金因其优异的各项性能，作为结构部件，广泛应用于航天领域中。航天器空间环境中存在各种辐射粒子，这些粒子会对航天器材料产生不同程度的辐照损伤，对其可靠性构成了巨大的威胁，甚至会导致航天任务失败。通过选取不同剂量下3 MeV的Fe¹¹⁺离子辐照7075铝合金，采用XRD、AFM和纳米压痕等测试手段对7075铝合金的辐照损伤进行了研究，分析了辐照前后7075铝合金的微观组织、表面形貌和硬度的变化。结果显示，离子辐照后的7075铝合金未形成新的相，且结构保持完整，表明其具有一定的抗辐照性能。同时，观察表面发现了由级联碰撞演化及表面缺陷扩散导致的山峰状突起，且样品表面粗糙度和突起的分布密度随剂量增加呈先增加后减小的趋势。另外，纳米压痕测试表明，辐照后样品硬度增加，且随剂量增加，硬度逐渐趋于饱和，经分析可知，样品产生辐照硬化是由于辐照缺陷阻碍了位错的滑移导致。
- 7075铝合金 /
- 离子辐照 /
- 表面粗糙度 /
- 辐照硬化 /
- 缺陷
Abstract: 7075 aluminum alloy is widely used in the field of aerospace materials as a structural component due to its excellent properties. There are various radiation particles in the spacecraft space environment, which will cause different degrees of irradiation damage to spacecraft materials, and threaten their reliability, and even lead to failure of space missions. Selecting different doses of 3 MeV Fe¹¹⁺ ions to radiate the 7075 aluminum alloy, using XRD, AFM and nanoindentation to study the microstructure, surface morphology and hardness changes before and after irradiation, the tapered protrusions caused by cascade collision evolution and surface defect diffusion are found on the surface and the surface roughness of the sample increased first and then decreased with the increase of dose. In addition, the nanoindentation test shows that the hardness of the sample increased after irradiation, and with the increase of dose, the hardness gradually became saturated. The analysis shows that the irradiation hardening of the sample is caused by the irradiation defects impeding the slippage of dislocations.
- 7075 aluminum alloy /
- ion irradiation /
- surface roughness /
- irradiation hardening /
- defect

HTML全文

图 1 空白样和辐照后的7075铝合金样品XRD图谱

Figure 1. XRD patterns of 7075 aluminum alloy sample(blank and after irradiation)

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图 2 空白样品与辐照后的样品的三维形貌图像

Figure 2. Three-dimensional topography images of sample before and after irradiation

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图 3 空白样品与辐照后样品的粗糙度变化

Figure 3. Changes in the roughness of the samplebefore and after irradiation

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图 4 辐照剂量不同样品纳米硬度与压入深度的关系

Figure 4. Relationship between nanohardness and indentation depth of different samples with different irradiation doses

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图 5 离子辐照前后样品的H²-1/h关系曲线

Figure 5. H²-1/h relationship curve of samplesbefore and after ion irradiation

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图 6 离子辐照前后7075铝合金硬化H₀与辐照损伤的关系

Figure 6. Relationship between 7075 aluminum alloy hardened H₀ and irradiation damage before and after ion irradiation

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表 1 7075铝合金样品化学成分表

Table 1. Chemical composition table of 7075 aluminum alloy sample

ingredient element	mass fraction/%
Al	93.59
Zn	2.36
Mg	2.89
Cu	0.66
Si	0.50

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表 2 Nix-Gao模型计算的不同辐照剂量下样品硬度值

Table 2. Nix-GAO model calculated hardness value of the sample irradiated at different irradiation doses

irradiation damage/dpa	H₀/GPa	∆H₀/GPa	hardening ratio η/%
unirradiated	2.24	—	—
0.16	2.35	0.11	4.90
0.78	2.38	0.14	6.25
1.60	2.44	0.20	8.93
7.80	2.56	0.32	14.3
注：$\text{Δ}{H}_{\text{0} }\text{=}{H}_{\text{0} }^{\text{irr} }\text{−}{H}_{\text{0} }^{\text{unirr} }，$$\eta { = }\dfrac{ { {\Delta }{H_{0} } } }{ {H_{0}^{ \text{iunirr} } } } \times {100{\text{%} } }$

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