PreprintArticleVersion 1This version is not peer-reviewed
In-Situ Microstructural Evolution and Mechanical Performance of Nickel-Containing Steels During High-Temperature Heat Treatment: Precipitation Behavior and Its Impact on Material Properties
Version 1
: Received: 4 August 2024 / Approved: 5 August 2024 / Online: 6 August 2024 (06:54:55 CEST)
How to cite:
Sun, G.; Li, Z.; Wang, Q. In-Situ Microstructural Evolution and Mechanical Performance of Nickel-Containing Steels During High-Temperature Heat Treatment: Precipitation Behavior and Its Impact on Material Properties. Preprints2024, 2024080314. https://doi.org/10.20944/preprints202408.0314.v1
Sun, G.; Li, Z.; Wang, Q. In-Situ Microstructural Evolution and Mechanical Performance of Nickel-Containing Steels During High-Temperature Heat Treatment: Precipitation Behavior and Its Impact on Material Properties. Preprints 2024, 2024080314. https://doi.org/10.20944/preprints202408.0314.v1
Sun, G.; Li, Z.; Wang, Q. In-Situ Microstructural Evolution and Mechanical Performance of Nickel-Containing Steels During High-Temperature Heat Treatment: Precipitation Behavior and Its Impact on Material Properties. Preprints2024, 2024080314. https://doi.org/10.20944/preprints202408.0314.v1
APA Style
Sun, G., Li, Z., & Wang, Q. (2024). In-Situ Microstructural Evolution and Mechanical Performance of Nickel-Containing Steels During High-Temperature Heat Treatment: Precipitation Behavior and Its Impact on Material Properties. Preprints. https://doi.org/10.20944/preprints202408.0314.v1
Chicago/Turabian Style
Sun, G., Zhenggui Li and Qi Wang. 2024 "In-Situ Microstructural Evolution and Mechanical Performance of Nickel-Containing Steels During High-Temperature Heat Treatment: Precipitation Behavior and Its Impact on Material Properties" Preprints. https://doi.org/10.20944/preprints202408.0314.v1
Abstract
This study investigates the microstructural evolution and mechanical properties of steel subjected to high-temperature heat treatment, with a focus on the formation and effects of dark phase precipitates. High Temperature Confocal Laser Scanning Microscopy (HTCLSM) was employed to observe the in-situ changes in microstructure as the steel was heated from room temperature to 900°C. The observations revealed that dark phase precipitates, identified as chromium carbides (Cr7C3), began forming at approximately 820°C and increased in quantity and size up to 900°C. Scanning Electron Microscopy (SEM) and Energy-Dispersive X-ray Spectroscopy (EDX) confirmed that these precipitates significantly enhance the material's hardness, with microhardness values of 320 HV for the precipitates compared to 270 HV for the matrix. Tensile tests showed that the tensile strength of the steel increases with soaking time at 900°C, reaching a maximum after 3 minutes due to the strengthening effect of the precipitates. Beyond this point, strength decreases due to grain coarsening.
Keywords
HTCLSM; Dark Phase Precipitates; Chromium Carbides; Microstructural Evolution; Mechanical properties
Subject
Engineering, Mechanical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
