In situ TEM investigation on the microstructure and phase evolution of hydrogenated Zr-4 alloy

被引：2
|
作者：
Wang, Yao [1 ]
Li, Yuanxing [1 ]
Chen, Hui [1 ]
Bai, Yujie [1 ]
Liu, Yi [1 ]
Zhu, Zongtao [1 ]
机构：
[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Peoples R China
来源：
SCRIPTA MATERIALIA | 2024年 / 238卷
基金：
中国国家自然科学基金;
关键词：
In situ TEM; Zirconium alloy; Hydrogenation; Phase transition; DIFFUSION BONDING BEHAVIOR; TEMPERATURE; ZIRCALOY-4; PARAMETERS;
D O I：
10.1016/j.scriptamat.2023.115773
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Bonding of Zr-4 alloy at high temperature risked the safe run of nuclear reactors. The diffusion bonding of Zr-4 alloy could be realized at low temperature by hydrogenation. In situ heating transmission electron microscopy was used to observe the microstructure and phase evolution of hydrogenated Zr-4 alloy during heating from room temperature to 650 degrees C to clarify the bonding mechanism of Zr-4 alloy. Zirconium hydrides gradually decomposed during the heating process and beta-Zr phase formed in the matrix as a result. The observed decrease in the beta phase transus temperature caused by hydrogen addition was about 210 degrees C. Results indicated that diffusion bonding of Zr-4 alloy can be achieved at lower temperature via hydrogenation because the beta phase with bodycentered cubic structure has better deformation ability.
引用
收藏
页数：5
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