Microstructure and mechanical properties of Nb-Si based alloys with addition of N

Tianyu Zhao; Qi Wang; Ruirun Chen; Zhecheng Zhou; Yanqing Su; Hengzhi Fu

doi:10.1016/j.msea.2022.144092

Microstructure and mechanical properties of Nb-Si based alloys with addition of N

Tianyu Zhao
, Qi Wang^*
, Ruirun Chen^*
, Zhecheng Zhou
, Yanqing Su
, Hengzhi Fu

^*Corresponding author for this work

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

In this paper, the effect of N addition on microstructure and mechanical properties of Nb-16Si-20Ti alloy was investigated. The nominal compositions of alloys are Nb-16Si-20Ti-xN (x = 0, 1, 2, 4, 8 at%). The research results show that the addition of N element will make the solidification path transfers from hypoeutectic to hypereutectic. TiN compound appears in all the N-contained alloys and grows up with the increase of concentration of N element. The transformation of silicide is verified by the Mediema and Toop thermodynamic model. The room-temperature fracture toughness of the alloys is ameliorated by addition of N element. Performance of 4 N alloy is the best, which is 50% higher than that of Nb-16Si-20Ti original alloy. Compressive strength increases 18.8% due to the grain refinement strengthening and solid solution strengthening caused by N element.

Original language	English
Article number	144092
Journal	Materials Science and Engineering: A
Volume	858
DOIs	https://doi.org/10.1016/j.msea.2022.144092
State	Published - 14 Nov 2022
Externally published	Yes

Keywords

Fracture toughness
Mediema
Microstructure
NbSi alloy
Nitrogen

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10.1016/j.msea.2022.144092

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@article{9f528b444c844cd3814fe9a17f0d646b,

title = "Microstructure and mechanical properties of Nb-Si based alloys with addition of N",

abstract = "In this paper, the effect of N addition on microstructure and mechanical properties of Nb-16Si-20Ti alloy was investigated. The nominal compositions of alloys are Nb-16Si-20Ti-xN (x = 0, 1, 2, 4, 8 at\%). The research results show that the addition of N element will make the solidification path transfers from hypoeutectic to hypereutectic. TiN compound appears in all the N-contained alloys and grows up with the increase of concentration of N element. The transformation of silicide is verified by the Mediema and Toop thermodynamic model. The room-temperature fracture toughness of the alloys is ameliorated by addition of N element. Performance of 4 N alloy is the best, which is 50\% higher than that of Nb-16Si-20Ti original alloy. Compressive strength increases 18.8\% due to the grain refinement strengthening and solid solution strengthening caused by N element.",

keywords = "Fracture toughness, Mediema, Microstructure, NbSi alloy, Nitrogen",

author = "Tianyu Zhao and Qi Wang and Ruirun Chen and Zhecheng Zhou and Yanqing Su and Hengzhi Fu",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = nov,

day = "14",

doi = "10.1016/j.msea.2022.144092",

language = "英语",

volume = "858",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Microstructure and mechanical properties of Nb-Si based alloys with addition of N

AU - Zhao, Tianyu

AU - Wang, Qi

AU - Chen, Ruirun

AU - Zhou, Zhecheng

AU - Su, Yanqing

AU - Fu, Hengzhi

PY - 2022/11/14

Y1 - 2022/11/14

N2 - In this paper, the effect of N addition on microstructure and mechanical properties of Nb-16Si-20Ti alloy was investigated. The nominal compositions of alloys are Nb-16Si-20Ti-xN (x = 0, 1, 2, 4, 8 at%). The research results show that the addition of N element will make the solidification path transfers from hypoeutectic to hypereutectic. TiN compound appears in all the N-contained alloys and grows up with the increase of concentration of N element. The transformation of silicide is verified by the Mediema and Toop thermodynamic model. The room-temperature fracture toughness of the alloys is ameliorated by addition of N element. Performance of 4 N alloy is the best, which is 50% higher than that of Nb-16Si-20Ti original alloy. Compressive strength increases 18.8% due to the grain refinement strengthening and solid solution strengthening caused by N element.

AB - In this paper, the effect of N addition on microstructure and mechanical properties of Nb-16Si-20Ti alloy was investigated. The nominal compositions of alloys are Nb-16Si-20Ti-xN (x = 0, 1, 2, 4, 8 at%). The research results show that the addition of N element will make the solidification path transfers from hypoeutectic to hypereutectic. TiN compound appears in all the N-contained alloys and grows up with the increase of concentration of N element. The transformation of silicide is verified by the Mediema and Toop thermodynamic model. The room-temperature fracture toughness of the alloys is ameliorated by addition of N element. Performance of 4 N alloy is the best, which is 50% higher than that of Nb-16Si-20Ti original alloy. Compressive strength increases 18.8% due to the grain refinement strengthening and solid solution strengthening caused by N element.

KW - Fracture toughness

KW - Mediema

KW - Microstructure

KW - NbSi alloy

KW - Nitrogen

UR - https://www.scopus.com/pages/publications/85140140830

U2 - 10.1016/j.msea.2022.144092

DO - 10.1016/j.msea.2022.144092

M3 - 文章

AN - SCOPUS:85140140830

SN - 0921-5093

VL - 858

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

M1 - 144092

ER -

Microstructure and mechanical properties of Nb-Si based alloys with addition of N

Abstract

Keywords

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