The formation mechanism of complex carbides in Nb-V microalloyed steel

Xiaolin Li; Haozhe Li; Linxi Liu; Xiangtao Deng; Zhaodong Wang

doi:10.1016/j.matlet.2021.131544

The formation mechanism of complex carbides in Nb-V microalloyed steel

Xiaolin Li, Haozhe Li, Linxi Liu, Xiangtao Deng, Zhaodong Wang

School of Materials Sience and Engineering

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

10 Scopus citations

Abstract

The formation mechanism of complex precipitates in Nb-V microalloyed steel has been systematically studied by high resolution transmission electron microscopy (HRTEM) and atom probe tomography (APT). The results reveal that there are two precipitation mechanism: replacement and heterogeneous mode. The core–shell precipitate has been observed with double direction Moiré fringe, which is formed by the heterogeneous mechanism, while for the precipitates with uniform distributed V and Nb atoms, is formed by the replacement mechanism. These two modes both reduce the lattice misfit and promote precipitation. In addition, the APT result reveals that the ratio of V to Nb increases with the increase of particle size, which matches well with the previous TEM results.

Original language	English
Article number	131544
Journal	Materials Letters
Volume	311
DOIs	https://doi.org/10.1016/j.matlet.2021.131544
State	Published - 15 Mar 2022

Keywords

Atom probe
Crystal structure
Microstructure
Nanoparticles
Precipitation mechanism

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10.1016/j.matlet.2021.131544

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title = "The formation mechanism of complex carbides in Nb-V microalloyed steel",

abstract = "The formation mechanism of complex precipitates in Nb-V microalloyed steel has been systematically studied by high resolution transmission electron microscopy (HRTEM) and atom probe tomography (APT). The results reveal that there are two precipitation mechanism: replacement and heterogeneous mode. The core–shell precipitate has been observed with double direction Moir{\'e} fringe, which is formed by the heterogeneous mechanism, while for the precipitates with uniform distributed V and Nb atoms, is formed by the replacement mechanism. These two modes both reduce the lattice misfit and promote precipitation. In addition, the APT result reveals that the ratio of V to Nb increases with the increase of particle size, which matches well with the previous TEM results.",

keywords = "Atom probe, Crystal structure, Microstructure, Nanoparticles, Precipitation mechanism",

author = "Xiaolin Li and Haozhe Li and Linxi Liu and Xiangtao Deng and Zhaodong Wang",

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T1 - The formation mechanism of complex carbides in Nb-V microalloyed steel

AU - Li, Xiaolin

AU - Li, Haozhe

AU - Liu, Linxi

AU - Deng, Xiangtao

AU - Wang, Zhaodong

PY - 2022/3/15

Y1 - 2022/3/15

N2 - The formation mechanism of complex precipitates in Nb-V microalloyed steel has been systematically studied by high resolution transmission electron microscopy (HRTEM) and atom probe tomography (APT). The results reveal that there are two precipitation mechanism: replacement and heterogeneous mode. The core–shell precipitate has been observed with double direction Moiré fringe, which is formed by the heterogeneous mechanism, while for the precipitates with uniform distributed V and Nb atoms, is formed by the replacement mechanism. These two modes both reduce the lattice misfit and promote precipitation. In addition, the APT result reveals that the ratio of V to Nb increases with the increase of particle size, which matches well with the previous TEM results.

AB - The formation mechanism of complex precipitates in Nb-V microalloyed steel has been systematically studied by high resolution transmission electron microscopy (HRTEM) and atom probe tomography (APT). The results reveal that there are two precipitation mechanism: replacement and heterogeneous mode. The core–shell precipitate has been observed with double direction Moiré fringe, which is formed by the heterogeneous mechanism, while for the precipitates with uniform distributed V and Nb atoms, is formed by the replacement mechanism. These two modes both reduce the lattice misfit and promote precipitation. In addition, the APT result reveals that the ratio of V to Nb increases with the increase of particle size, which matches well with the previous TEM results.

KW - Atom probe

KW - Crystal structure

KW - Microstructure

KW - Nanoparticles

KW - Precipitation mechanism

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U2 - 10.1016/j.matlet.2021.131544

DO - 10.1016/j.matlet.2021.131544

M3 - 文章

AN - SCOPUS:85121704532

SN - 0167-577X

VL - 311

JO - Materials Letters

JF - Materials Letters

M1 - 131544

ER -

The formation mechanism of complex carbides in Nb-V microalloyed steel

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Keywords

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