Homogenization behavior of IN 718 superalloy prepared by electron beam layered solidification technology

被引：19
|
作者：
Zhao, Longhai [1 ,2 ]
Tan, Yi [1 ,2 ]
Wang, Yilin [1 ,2 ]
You, Xiaogang [1 ,2 ]
Chang, Kai [1 ,2 ]
Zhuang, Xinpeng [1 ,2 ]
Li, Pengting [1 ,2 ]
Hu, Yebing [3 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China
[2] Key Lab Energy Beam Met & Adv Mat Preparat Liaoni, Dalian 116023, Peoples R China
[3] Dalian Univ Technol, Engn Training Ctr, Dalian 116024, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2021年 / 13卷
基金：
中国国家自然科学基金;
关键词：
Homogenization behavior; Electron beam smelting; Layered solidification technology; TI;
D O I：
10.1016/j.jmrt.2021.05.109
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The homogenization behavior of IN 718 superalloy prepared by electron beam layered solidification has been investigated at 1150 degrees C. The set temperature was accurately corrected as 1149 degrees C by a compound method. The effect of homogenization treatment on the microstructure and microsegregation evolution was discussed by two models. A further discussion about Nb diffusion was conducted. The results show that the microsegregation was eliminated after the ingot was homogenized for 8 h at 1150 degrees C. Meanwhile, D-Nb and D-Ti is calculated approximately as 3.8 x 10(-11) cm(2)/s and 4.0 x 10(-11) cm(2)/s, respectively. The completion time of homogenization at a certain temperature depends on the degree of segregation, the distance between the secondary dendrite arms and the content of Nb. Additionally, it seems like that the D-Nb in IN 718 alloy decreases with the decrease of its concentration at the same temperature. (C) 2021 The Author(s). Published by Elsevier B.V.
引用
收藏
页码：1567 / 1575
页数：9
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