Xe离子辐照诱导镍基高温合金组织演变及硬化效应

IF 1 4区工程技术 Q3 NUCLEAR SCIENCE & TECHNOLOGY

Science and Technology of Nuclear Installations Pub Date : 2021-11-19 DOI:10.1155/2021/5535478

Yu Hou, DeHui Li, Yan-Er Lu, Hefei Huang, WeiGuo Yang, Renduo Liu

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引用次数: 2

摘要

采用1mev Xe20+和7mev Xe26+离子辐照镍基高温合金哈氏合金N，室温下位移损伤范围为0.5 ~ 10dpa。采用透射电子显微镜(TEM)、x射线衍射仪(XRD)和纳米压痕仪对辐照后的镍基高温合金进行了表征，以确定其显微组织演变和纳米压痕硬度的变化。TEM结果表明，在0.5 dPa的辐照下，离子辐照引起了大量的黑点和波纹结构等缺陷，第二相迅速非晶化。XRD结果表明，离子辐照后的哈氏合金样品未发生晶格畸变。在本研究中观察到明显的辐照硬化现象，硬度随Xe离子的影响而增大。钉住效应使缺陷成为位错自由运动的障碍，这可能是辐照诱发硬化的原因。

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Xe Ion Irradiation-Induced Microstructural Evolution and Hardening Effect of Nickel-Base Superalloy

The nickel-base superalloy Hastelloy N was irradiated using 1 MeV Xe20+ and 7 MeV Xe26+ ions with displacement damage ranging from 0.5 dPa to 10 dPa at room temperature (RT). The irradiated Ni-based superalloy was characterized with transmission electron microscopy (TEM), XRD, and nanoindenter to determine the changes in microstructural evolution and nanoindentation hardness. The TEM results showed that ion irradiation induced a large number of defects such as black spots and corrugated structures and the second phase was rapidly amorphized after being irradiated to a fluence of 0.5 dPa. The XRD results showed that the Hastelloy N alloy sample did not undergo lattice distortion after ion irradiation. An obvious irradiation hardening phenomenon was observed in this study, and the hardness increased with Xe ion fluence. The pinning effect in which the defects can become obstacles to the free movement of dislocation may be responsible for the irradiation-induced hardening.

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来源期刊

Science and Technology of Nuclear Installations NUCLEAR SCIENCE & TECHNOLOGY-

CiteScore

2.30

自引率

9.10%

发文量

审稿时长

4-8 weeks

期刊介绍： Science and Technology of Nuclear Installations is an international scientific journal that aims to make available knowledge on issues related to the nuclear industry and to promote development in the area of nuclear sciences and technologies. The endeavor associated with the establishment and the growth of the journal is expected to lend support to the renaissance of nuclear technology in the world and especially in those countries where nuclear programs have not yet been developed.