文献类型：期刊文献

英文题名：Formation and aggregation behavior of inclusions in Ni-based alloys with different Mg contents

作者：Gao, Ruizhi Li, Lin Chen, Chaoyi Li, Junqi Wang, Linzhu Li, Xiang Yang, Hui

第一作者：Gao, Ruizhi

通信作者：Wang, LZ[1];Wang, LZ[2]

机构：[1]Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China;[2]Guizhou Univ, Guizhou Prov Univ Key Lab High Performance Battery, Guiyang 550025, Guizhou, Peoples R China;[3]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Guizhou, Peoples R China;[4]Guizhou Univ, Guiyang 550025, Guizhou, Peoples R China

第一机构：Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China;corresponding author), Guizhou Univ, Guiyang 550025, Guizhou, Peoples R China.

年份：2023

卷号：26

起止页码：5252-5263

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20233714715984);Scopus(收录号：2-s2.0-85170411121);WOS:【SCI-EXPANDED(收录号:WOS:001074842700001)】；

基金：Guizhou Provincial Basic Research Program (Natural Science) (Nos. ZK [2021] 258 and ZK [2023] Zhongdian 020) and Guizhou Provincial Key Technology R&D Program (Nos. [2021] 342) . Additionally, this project is supported by the research pro-gram for talented scholars of the Guizhou Institute of Tech-nology with grant No. XJGC20190962 and the Natural Science Research Project of Guizhou Provincial Department of Edu-cation ( [2022] 041) .

语种：英文

外文关键词：Inclusions; Nickel -based superalloy; Thermodynamic calculation; Capillary force

摘要：Large non-metallic inclusions affect the mechanical properties and service life of nickel -based superalloys. This study investigates the effects of magnesium elements on non-metallic inclusions in K4169 nickel-based superalloys, exploring the formation mechanisms and aggregation relationships of the inclusions. Four gradients of the magnesium content were used to simulate the erosion of MgO refractories on inclusions in the vacuum induction melting of nickel-based superalloys. The observed inclusions mainly comprised MgO, TiN, MgAl2O4, and MgAl2O4-TiN composites. To study the formation mechanism of inclusions in Ni-based alloys with different Mg contents, the predominance diagram of Mg-Al-Ti-O inclusions in nickel-based superalloy systems was calculated using Factsage thermodynamics software and classical thermodynamics separately. The aggregation behavior of MgAl(2)O(4)and MgO inclusions on the surface of molten nickel-based superalloys was observed in situ under a high-temperature confocal laser scan microscope. The capillary force acting on inclusions in nickel-based superalloys was calculated using the Kralchevsky-Paunov model (K-P model), the calculation was verified with experimental results, and the influencing factors were analyzed. The capillary force acting on inclusions on the surface of molten nickel-based superalloys weakened in the order of MgAl2O4>-MgO > Al2O3, which is the opposite of the order for the force acting on inclusions in molten steel. Minimizing the magnesium content in the alloy is crucial to preventing the formation of large inclusions in nickel-based superalloys, and the use of magnesium-containing materials in the smelting process should thus be avoided.(c) 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).