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| 离子辐照对316L不锈钢焊缝晶体结构与力学性能的影响 |
| Effect of Ion Irradiation on the Crystal Structure and Mechanical Properties of 316L Stainless Steel Weld Metal |
| Received:May 05, 2021 |
| DOI：10.3969/j.issn.1674-6457.2021.05.021 |
| 中文关键词: 316L不锈钢 焊缝金属 离子辐照 纳米压痕 辐照硬化 |
| 英文关键词: 316L stainless steel weld metal ion irradiation nanoindentation radiation hardening |
| 基金项目:国家自然科学基金(51875264) |
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| 中文摘要: |
| 目的 研究不同剂量离子辐照对不锈钢焊缝金属微观组织结构及力学性能的影响机理和影响规律。方法 通过添加3种剂量的氦离子和氘离子对316L不锈钢TIG焊焊缝金属进行辐照，分别使用XRD、纳米压痕与SEM来分析研究离子辐照对316L不锈钢焊缝金属的晶体结构、力学性能以及表面微观形貌的影响。结果 离子辐照后，焊缝金属XRD衍射峰向高角度发生偏移;随辐照剂量的增加，焊缝金属显微硬度增加，显微硬度增加值随辐照剂量的增加逐渐趋于饱和;离子辐照使焊缝金属表面产生大量辐照孔洞，随着辐照剂量的增加，焊缝金属表面辐照孔洞越大。结论 离子辐照导致焊缝金属晶体结构发生变化，使焊缝金属出现辐照硬化现象;与氘离子辐照相比，氦离子辐照孔洞更大，辐照硬化率更高。 |
| 英文摘要: |
| This paper aims to study the mechanism and law of the influence of different doses of ion irradiation on the microstructure and mechanical properties of stainless steel weld metal. Three doses of helium ion and deuterium ion are used to irradiate the weld metal of 316L stainless steel TIG weld metal. XRD, nanoindentation and SEM were used to analyze and study the influence and law of ion irradiation on the crystal structure, mechanical properties and surface micromorphology of 316L stainless steel weld metal. After ion irradiation, the XRD diffraction peaks of the weld metal shifted to high angles. With the increase of the radiation dose, the microhardness of the weld metal increases, and the increase of the microhardness gradually becomes saturated with the increase of the radiation dose. Ion irradiation makes a large number of irradiated holes on the weld metal surface, and the irradiated holes on the weld metal surface increase with the increase of the radiation dose. Ion irradiation leads to changes in the crystal structure of the weld metal, which makes the weld metal appear radiation hardening. Compared with deuterium ion irradiation, helium ion irradiation has larger holes and higher radiation hardening rate. |
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