Influence of grain boundaries and pre-precipitates on ion implantation-induced precipitation in the V-4Cr-4Ti alloy

被引：11
|
作者：
Zhu, Boling [1 ]
Yang, Shanwu [1 ]
Ding, Jianwen [1 ]
Zhang, Wenhua [1 ,2 ]
Long, Yi [1 ]
Wan, Farong [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Capital Aerosp Machinery Co, Beijing 100076, Peoples R China
来源：
FUSION ENGINEERING AND DESIGN | 2015年 / 100卷
基金：
中国国家自然科学基金;
关键词：
Precipitates; Grain boundaries; Kirkendall effect; V-4Cr-4Ti alloy; CR-TI ALLOYS; VANADIUM ALLOYS; NEUTRON-IRRADIATION; MECHANICAL-PROPERTIES; BEHAVIOR; DIFFUSION; MICROSTRUCTURE; EMBRITTLEMENT; IMPURITIES; EVOLUTION;
D O I：
10.1016/j.fusengdes.2015.05.055
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The V-4Cr-4Ti alloy which contains the pre-precipitates has been subjected to implantation of high energy ions at room temperature. It was found that the Ti-rich precipitates occur at grain boundaries while the far finer precipitates form within the grains. The ion implantation also results in variation of appearance of the pre-precipitates in the samples. These results indicate that diffusion in the samples is obviously enhanced by ion implantation-induced vacancies. The vacancies will disappear at the grain boundaries and the precipitates/matrix interfaces, which will transfer vanadium atoms prior out of the boundaries or the interfaces due to Kirkendall effect. In this way, the Ti-rich precipitates will form at the boundaries. Meanwhile, the pre-precipitates will change their shape. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：171 / 176
页数：6
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