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Kinetics study of nitrogen removal from liquid IN718 alloy during vacuum induction melting
Qian, Kun1,2; Chen, Bo1,2; Zhang, Long1; Du, Zhanhui1; Liu, Kui1,2
Corresponding AuthorChen, Bo(bchen@imr.ac.cn) ; Liu, Kui(kliu@imr.ac.cn)
2020-09-01
Source PublicationVACUUM
ISSN0042-207X
Volume179Pages:11
AbstractThe kinetics of nitrogen removal from the molten IN718 alloy has been investigated by the sampling method under reduced pressure. The effects of initial nitrogen concentrations, alloying elements (carbon, titanium, and aluminum), and the intensity of inductive stirring on the nitrogen removal are discussed in the temperature range from 1773 to 1923 K. Experimental results indicate that the nitrogen removal is a 1.5th-order reaction at different initial nitrogen concentrations and temperatures, and the nitrogen removal reaction is controlled by a mixed interfacial and diffusion process. Moreover, the nitrogen removal reaction can be accelerated when the [C]+[O] = CO(g) reaction exists in the melt, and the kinetics changes gradually from a 1.5th-order reaction to a second-order reaction with increasing temperature from 1773 to 1873 K. The nitrogen removal is a second-order reaction in low-speed stirring. Meanwhile, the rate constant of nitrogen removal under the condition of where the mass transfer resistance in the gas phase is negligible, is evaluated. The rate constant of the nitrogen removal increases with increasing temperature. It is also found that titanium decreases the rate constant of nitrogen removal, and aluminum and carbon significantly increase the rate constant of nitrogen removal.
KeywordKinetics IN718 alloy Nitrogen removal Reaction order
DOI10.1016/j.vacuum.2020.109521
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000557782200045
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140157
Collection中国科学院金属研究所
Corresponding AuthorChen, Bo; Liu, Kui
Affiliation1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Qian, Kun,Chen, Bo,Zhang, Long,et al. Kinetics study of nitrogen removal from liquid IN718 alloy during vacuum induction melting[J]. VACUUM,2020,179:11.
APA Qian, Kun,Chen, Bo,Zhang, Long,Du, Zhanhui,&Liu, Kui.(2020).Kinetics study of nitrogen removal from liquid IN718 alloy during vacuum induction melting.VACUUM,179,11.
MLA Qian, Kun,et al."Kinetics study of nitrogen removal from liquid IN718 alloy during vacuum induction melting".VACUUM 179(2020):11.
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