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Effect of Thermal Simulation Process on Microstructure of Seismic Steel Bars
Thermal deformation has a significant influence on the microstructure of high-strength antiseismic steel. The effect of hot deformation on the microstructure of experimental steel was studied by the Gleeble-3800 thermal simulator. The microstructure of the steel was characterized by the metallograph...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9147011/ https://www.ncbi.nlm.nih.gov/pubmed/35629463 http://dx.doi.org/10.3390/ma15103438 |
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author | Huang, Sheng Li, Changrong Li, Zhiying Zhuang, Changling Zeng, Zeyun Wang, Jie |
author_facet | Huang, Sheng Li, Changrong Li, Zhiying Zhuang, Changling Zeng, Zeyun Wang, Jie |
author_sort | Huang, Sheng |
collection | PubMed |
description | Thermal deformation has a significant influence on the microstructure of high-strength antiseismic steel. The effect of hot deformation on the microstructure of experimental steel was studied by the Gleeble-3800 thermal simulator. The microstructure of the steel was characterized by the metallographic microscope, microhardness, tensile test, field emission scanning electron microscope, electron backscatter diffraction, and high-resolution transmission electron microscope. The results show that the core microstructure of the test steel is composed of polygonal ferrite and lamellar pearlite. The test steel is mainly ductile fracture. Tensile strength and hardness increase with the decrease of temperature. At 650 °C isothermal temperature, the ferrite distribution was uniform, the average grain size was 7.78 μm, the grain size grade reached 11, the pearlite lamellar spacing was 0.208 μm, and the tensile fracture was distributed with uniform equiaxed dimples. Polygonal ferrite grain boundaries have high density dislocations that can effectively block the initiation and propagation of cracks. However, there are some low dislocation boundaries and subgrain boundaries in ferrite grains. Precipitation strengthening is mainly provided by fine precipitates of V-rich carbonitride in experimental steel. The precipitates are round or narrow strips, about 70–100 nm in size, distributed along ferrite grain boundaries and matrix. |
format | Online Article Text |
id | pubmed-9147011 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-91470112022-05-29 Effect of Thermal Simulation Process on Microstructure of Seismic Steel Bars Huang, Sheng Li, Changrong Li, Zhiying Zhuang, Changling Zeng, Zeyun Wang, Jie Materials (Basel) Article Thermal deformation has a significant influence on the microstructure of high-strength antiseismic steel. The effect of hot deformation on the microstructure of experimental steel was studied by the Gleeble-3800 thermal simulator. The microstructure of the steel was characterized by the metallographic microscope, microhardness, tensile test, field emission scanning electron microscope, electron backscatter diffraction, and high-resolution transmission electron microscope. The results show that the core microstructure of the test steel is composed of polygonal ferrite and lamellar pearlite. The test steel is mainly ductile fracture. Tensile strength and hardness increase with the decrease of temperature. At 650 °C isothermal temperature, the ferrite distribution was uniform, the average grain size was 7.78 μm, the grain size grade reached 11, the pearlite lamellar spacing was 0.208 μm, and the tensile fracture was distributed with uniform equiaxed dimples. Polygonal ferrite grain boundaries have high density dislocations that can effectively block the initiation and propagation of cracks. However, there are some low dislocation boundaries and subgrain boundaries in ferrite grains. Precipitation strengthening is mainly provided by fine precipitates of V-rich carbonitride in experimental steel. The precipitates are round or narrow strips, about 70–100 nm in size, distributed along ferrite grain boundaries and matrix. MDPI 2022-05-10 /pmc/articles/PMC9147011/ /pubmed/35629463 http://dx.doi.org/10.3390/ma15103438 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Huang, Sheng Li, Changrong Li, Zhiying Zhuang, Changling Zeng, Zeyun Wang, Jie Effect of Thermal Simulation Process on Microstructure of Seismic Steel Bars |
title | Effect of Thermal Simulation Process on Microstructure of Seismic Steel Bars |
title_full | Effect of Thermal Simulation Process on Microstructure of Seismic Steel Bars |
title_fullStr | Effect of Thermal Simulation Process on Microstructure of Seismic Steel Bars |
title_full_unstemmed | Effect of Thermal Simulation Process on Microstructure of Seismic Steel Bars |
title_short | Effect of Thermal Simulation Process on Microstructure of Seismic Steel Bars |
title_sort | effect of thermal simulation process on microstructure of seismic steel bars |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9147011/ https://www.ncbi.nlm.nih.gov/pubmed/35629463 http://dx.doi.org/10.3390/ma15103438 |
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