Microstructure and mechanical properties of Nb-Si alloy with addition of Mn

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

doi:10.1016/j.jmrt.2022.07.084

Microstructure and mechanical properties of Nb-Si alloy with addition of Mn

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

22 Scopus citations

Abstract

The effect of Mn element on the microstructure and mechanical properties of Nb-Si based alloys is studied, and the investigated alloys compositions are Nb-16Si-22Ti-xMn (x = 0, 2, 4, 8 at.%). Solubility of Mn in Nbss phase is higher than that in silicide. This dissolution of Mn in Nbss phase and silicide causes solid solution strengthening. Tiss phase and Mn2Ti phase eutectic structure precipitates between dendrites of 8Mn alloy, which affect room-temperature fracture toughness and compressive strength adversely. After heat treatment, Tiss phase and Mn2Ti eutectic structure almost disappears in Mn-contained alloys (Nb, Ti)3Si phase decomposes and transforms to Nbss phase and α-(Nb, Ti)5Si3 phase. The fracture toughness of heat treated 8Mn alloy has been improved greatly due to Mn solution strengthening in Nbss phase.

Original language	English
Pages (from-to)	708-719
Number of pages	12
Journal	Journal of Materials Research and Technology
Volume	20
DOIs	https://doi.org/10.1016/j.jmrt.2022.07.084
State	Published - Sep 2022
Externally published	Yes

Keywords

Fracture toughness
Microstructure
Mn
Nb-Si alloy

Access to Document

10.1016/j.jmrt.2022.07.084

Cite this

@article{d383f6aa9c514616b38bbb96dea488ce,

title = "Microstructure and mechanical properties of Nb-Si alloy with addition of Mn",

abstract = "The effect of Mn element on the microstructure and mechanical properties of Nb-Si based alloys is studied, and the investigated alloys compositions are Nb-16Si-22Ti-xMn (x = 0, 2, 4, 8 at.\%). Solubility of Mn in Nbss phase is higher than that in silicide. This dissolution of Mn in Nbss phase and silicide causes solid solution strengthening. Tiss phase and Mn2Ti phase eutectic structure precipitates between dendrites of 8Mn alloy, which affect room-temperature fracture toughness and compressive strength adversely. After heat treatment, Tiss phase and Mn2Ti eutectic structure almost disappears in Mn-contained alloys (Nb, Ti)3Si phase decomposes and transforms to Nbss phase and α-(Nb, Ti)5Si3 phase. The fracture toughness of heat treated 8Mn alloy has been improved greatly due to Mn solution strengthening in Nbss phase.",

keywords = "Fracture toughness, Microstructure, Mn, Nb-Si alloy",

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

note = "Publisher Copyright: {\textcopyright} 2022 The Authors.",

year = "2022",

month = sep,

doi = "10.1016/j.jmrt.2022.07.084",

language = "英语",

volume = "20",

pages = "708--719",

journal = "Journal of Materials Research and Technology",

issn = "2238-7854",

publisher = "Elsevier Editora Ltda",

}

TY - JOUR

T1 - Microstructure and mechanical properties of Nb-Si alloy with addition of Mn

AU - Zhao, Tianyu

AU - Wang, Qi

AU - Chen, Ruirun

AU - Zhou, Zhecheng

AU - Su, Yanqing

AU - Fu, Hengzhi

PY - 2022/9

Y1 - 2022/9

N2 - The effect of Mn element on the microstructure and mechanical properties of Nb-Si based alloys is studied, and the investigated alloys compositions are Nb-16Si-22Ti-xMn (x = 0, 2, 4, 8 at.%). Solubility of Mn in Nbss phase is higher than that in silicide. This dissolution of Mn in Nbss phase and silicide causes solid solution strengthening. Tiss phase and Mn2Ti phase eutectic structure precipitates between dendrites of 8Mn alloy, which affect room-temperature fracture toughness and compressive strength adversely. After heat treatment, Tiss phase and Mn2Ti eutectic structure almost disappears in Mn-contained alloys (Nb, Ti)3Si phase decomposes and transforms to Nbss phase and α-(Nb, Ti)5Si3 phase. The fracture toughness of heat treated 8Mn alloy has been improved greatly due to Mn solution strengthening in Nbss phase.

AB - The effect of Mn element on the microstructure and mechanical properties of Nb-Si based alloys is studied, and the investigated alloys compositions are Nb-16Si-22Ti-xMn (x = 0, 2, 4, 8 at.%). Solubility of Mn in Nbss phase is higher than that in silicide. This dissolution of Mn in Nbss phase and silicide causes solid solution strengthening. Tiss phase and Mn2Ti phase eutectic structure precipitates between dendrites of 8Mn alloy, which affect room-temperature fracture toughness and compressive strength adversely. After heat treatment, Tiss phase and Mn2Ti eutectic structure almost disappears in Mn-contained alloys (Nb, Ti)3Si phase decomposes and transforms to Nbss phase and α-(Nb, Ti)5Si3 phase. The fracture toughness of heat treated 8Mn alloy has been improved greatly due to Mn solution strengthening in Nbss phase.

KW - Fracture toughness

KW - Microstructure

KW - Mn

KW - Nb-Si alloy

UR - https://www.scopus.com/pages/publications/85139963098

U2 - 10.1016/j.jmrt.2022.07.084

DO - 10.1016/j.jmrt.2022.07.084

M3 - 文章

AN - SCOPUS:85139963098

SN - 2238-7854

VL - 20

SP - 708

EP - 719

JO - Journal of Materials Research and Technology

JF - Journal of Materials Research and Technology

ER -

Microstructure and mechanical properties of Nb-Si alloy with addition of Mn

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this