| 纳米结构9Cr-ODS钢的微观结构及对氦泡形成的影响 |
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| 引用本文： | 卢晨阳,吕铮,李云鹏,刘春明. 纳米结构9Cr-ODS钢的微观结构及对氦泡形成的影响[J]. 东北大学学报(自然科学版), 2014, 35(8): 1133-1136. DOI: 10.12068/j.issn.1005-3026.2014.08.016 |
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| 作者姓名： | 卢晨阳 吕铮 李云鹏 刘春明 |
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| 作者单位： | (1 东北大学 材料各向异性与织构教育部重点实验室， 辽宁 沈阳110819; 2 东北大学 材料与冶金学院， 辽宁 沈阳110819) |
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| 基金项目： | 国家重点基础研究发展计划项目(2011CB610405);国家自然科学基金资助项目(50971033,91026013);教育部新世纪优秀人才支持计划项目(NCET-10-0302);中央高校基本科研业务费专项资金资助项目(N120510001) |
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| 摘 要： | 以采用机械合金化和热等静压法制备的纳米结构9Cr-ODS钢为研究对象，利用高分辨率透射电镜和扫描透射电镜的高角环形暗场像等手段分析了9Cr-ODS钢的微观结构特征；利用400keV离子加速器向9Cr-ODS钢及无ODS的Eurofer97钢中注入4×1017/cm2氦离子，对比了氦泡尺寸.结果表明:纳米结构9Cr-ODS钢的平均晶粒尺寸约05μm，存在两种尺寸不同的析出相:超高密度弥散分布的纳米尺度Y2Ti2O7析出相和倾向于在晶界形成的尺寸较大的Mn(Ti)Cr2O4析出相.ODS钢中的氦泡尺寸明显小于Eurofer97钢，说明纳米析出相对粗大氦泡的形成有明显的抑制作用.
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| 关 键 词： | ODS钢 氦离子注入 析出相 Y-Ti-O Mn(Ti)Cr2O4 |
Microstructure and Its Influence on Helium Bubbles in Nano structured 9Cr ODS Steel |
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| LU Chen yang,LYU Zheng,LI Yun peng,LIU Chun ming. Microstructure and Its Influence on Helium Bubbles in Nano structured 9Cr ODS Steel[J]. Journal of Northeastern University(Natural Science), 2014, 35(8): 1133-1136. DOI: 10.12068/j.issn.1005-3026.2014.08.016 |
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| Authors: | LU Chen yang LYU Zheng LI Yun peng LIU Chun ming |
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| Affiliation: | 1 Key Laboratory for Anisotropy and Texture of Materials |
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| Abstract: | A 9Cr ODS steel was prepared by mechanical alloying and hot isostatic pressing methods. The microstructures were characterized by high resolution transmission electron microscopy and high angle annular dark field scanning transmission electron microscopy (HAADF STEM). Helium ions of 4×1017/cm2 were respectively implanted into the 9Cr ODS steel and non ODS Eurofer97 steel with a 400keV ion accelerator， and the sizes of helium bubbles in the two steels were observed by HAADF STEM. The results show that the average grain size of the 9Cr ODS steel is about 05μm. Two kinds of precipitates were observed in the ODS steel: high density nano size Y2Ti2O7 and large Mn(Ti)Cr2O4 formed mainly at the grain boundaries. The size of the helium bubbles in ODS steels is much more smaller than that in Eurofer97 steel， which means that the nano size precipitates are helpful to suppress the formation of coarse helium bubbles. |
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| Keywords: | ODS steel helium ion implantation precipitate Y Ti O Mn(Ti)Cr2O4 |
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