| Ti-2Al-2.5Zr合金He离子辐照效应研究 |
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| 引用本文： | 何晓,封向东,周继萌,刘彦章,祖小涛.Ti-2Al-2.5Zr合金He离子辐照效应研究[J].强激光与粒子束,2006,18(7):1208-1210. |
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| 作者姓名： | 何晓 封向东 周继萌 刘彦章 祖小涛 |
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| 作者单位： | 1. 电子科技大学 应用物理系，成都 610054;2. 四川大学 辐射物理及技术教育部重点实验室，成都 610064 |
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| 基金项目： | 国家自然科学基金委员会-中国工程物理研究院联合资助项目;国家重点实验室基金 |
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| 摘 要： | 在Ti-2Al-2.5Zr合金中注入能量为75 keV的He离子，注入剂量分别为5×1016cm-2，1×1017 cm-2。通过显微硬度测量和剖面电子显微观察，研究了He离子对Ti-2Al-2.5Zr合金力学性能和显微组织的影响。结果表明:样品的显微硬度随He离子注量的增加而升高，在温度为350和550 ℃的Ar气中退火后硬度有所下降。剖面电子显微观察发现有位错环和He气泡生成，退火后He气泡有长大、缺陷有回复的趋势。辐照产生的位错环是辐照后硬度升高的直接原因，其退火发生回复又引起硬度随退火温度的升高而降低。
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| 关 键 词： | Ti-2Al-2.5Zr合金 离子注入 透射电镜 显微硬度 |
| 文章编号： | 1001-4322(2006)07-1208-03 |
| 收稿时间： | 2006-01-13 |
| 修稿时间： | 2006-06-22 |
Effect of He on properties and microstructure of Ti-2Al-2.5Zr alloy |
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| HE Xiao,FENG Xiang-dong,ZHOU Ji-meng,LIU Yan-zhang,ZU Xiao-tao.Effect of He on properties and microstructure of Ti-2Al-2.5Zr alloy[J].High Power Laser and Particle Beams,2006,18(7):1208-1210. |
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| Authors: | HE Xiao FENG Xiang-dong ZHOU Ji-meng LIU Yan-zhang ZU Xiao-tao |
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| Institution: | 1. Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China;2. Key Laboratory for Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064, China |
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| Abstract: | Ion-implantation-enhanced hardening and microstructure change of a Ti-2Al-2.5Zr alloy by 75 keV helium ion implantation with the dose of 5×1016 cm-2 or 1×1017 cm-2 is investigated. The maximum temperature during the implantation was monitored to be less than 200 ℃. The base pressure in the vacuum chamber was 6×10-4 Pa, and the working pressure was 1.6×10-3 Pa. The morphology and the structure of the implant samples have been characterized by TEM using a JEOL 2010FEG at 200 keV. The surface characterization of samples was studied by Vickers hardness tests. The He-induced hardening was observed. The He-induced hardening decreases with annealing at 350 ℃ and 550 ℃. The results of TEM analysis show that helium bubbles and dislocation loops are formed in the near surface region. He-ion-i |
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| Keywords: | Ti-2Al-2 5Zr alloy He ion implantation TEM Mierohardness |
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