Revealing the kinetics of non-metallic inclusion reactions in steel using in-situ high temperature environmental scanning electron microscopy

被引：6

作者：

Alatarvas, Tuomas ^{[1
]}

Podor, Renaud ^{[2
]}

Heikkinen, Eetu-Pekka ^{[1
]}

Shu, Qifeng ^{[1
]}

Singh, Harishchandra ^{[3
]}

机构：

[1] Univ Oulu, Ctr Adv Steels Res, Proc Met Res Unit, Oulu FIN-90014, Finland

[2] Univ Montpellier, CNRS, ICSM, CEA, Marcoule, France

[3] Univ Oulu, Ctr Adv Steels Res, Nano & Mol Syst Res Unit, Oulu FIN-90014, Finland

来源：

MATERIALS & DESIGN | 2023年 / 232卷

关键词：

In -situ characterisation; HT-ESEM; Non-metallic inclusions; Steel; Thermodynamic calculations;

D O I：

10.1016/j.matdes.2023.112139

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The kinetics of solid-state reactions involving non-metallic inclusions (NMIs) in steel is a topic of growing interest due to the need to understand the effects of heat treatments on NMI composition and stability. In this study, a High Temperature Environmental Scanning Electron Microscope (HT-ESEM) is utilized to conduct in-situ observations of various types of NMIs, including calcium aluminate complex, CaS, MgAl2O4-CaS, MnS, and TiN, in steels at temperatures of 800( degrees)C and 900(degrees) C for different holding times. The observed morphological variations in the NMIs indicate a decrease in the fractions of CaS and MnS, promoting void formation and ferrite-austenite phase transformation. To estimate the NMI reactions with the residual atmosphere in the sample chamber during experiments, HT-ESEM-driven thermodynamic calculations have been performed using FactSage 8.2 software. These calculations provide valuable insights into the interpretation of the experimental data, facilitating a better understanding of the complex NMI reactions in steel.

引用

页数：9

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