Uniaxial diffusion bonding of CLAM/CLAM steels: Microstructure and mechanical performance

被引:25
|
作者
Zhou, Xiaosheng [1 ]
Liu, Yongchang [1 ]
Yu, Liming [1 ]
Liu, Chenxi [1 ]
Sui, Guofa [1 ]
Yang, Jianguo [1 ]
机构
[1] Tianjin Univ, Sch Mat Sci & Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300072, Peoples R China
基金
中国国家自然科学基金;
关键词
CLAM STEEL; IRRADIATION; POWER;
D O I
10.1016/j.jnucmat.2015.03.033
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
By performing a two-step uniaxial diffusion bonding, the reliable joining between CLAM/CLAM steels has been attained. The microstructures at the vicinity of the joint region and in base material were respectively investigated through OM, SEM and TEM. The joint interface was integrated, and no microstructural defects were observed. In the base material, small amount of austenite is retained as thin films between martensite laths, which was suggested to be related to the compressive deformation in diffusion bonding. As a candidate structural material for the first wall in fusion energy systems, the radiation resistance of CLAM steel would be deteriorated by the retained austenite. Tensile and impact tests were carried out to assess the reliability of the joints subjected to post bond heat treatment. All the tensile specimens fractured in the base CLAM steel, meaning the good joining between CLAM steels. However, due to the low impact absorbed energy of the joints, efforts should still be made to optimize the bonding technology and the post bond heat treatment further. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:301 / 307
页数:7
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