Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions

HRB500E seismic steel bars are mainly used in high-rise buildings near the seismic zone. The influence of different niobium contents (0–0.023%) on the microstructure and mechanical properties of HRB500E seismic reinforcement was studied. Results showed that the grain size of ferrite was between 3.6...

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Autores principales:	Huang Sheng, Li Changrong, Li Zhiying, Zeng Zeyun, Zhai Yongqiang, Wang Jie, Liu Zhanlin, Zhuang Changling
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	seismic reinforcement microstructure slice spacing yield strength Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
Acceso en línea:	https://doaj.org/article/609af94824094e3ba49805bc999ccf91
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spelling	oai:doaj.org-article:609af94824094e3ba49805bc999ccf912021-12-05T14:10:50ZQuantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions2191-032410.1515/htmp-2021-0031https://doaj.org/article/609af94824094e3ba49805bc999ccf912021-09-01T00:00:00Zhttps://doi.org/10.1515/htmp-2021-0031https://doaj.org/toc/2191-0324HRB500E seismic steel bars are mainly used in high-rise buildings near the seismic zone. The influence of different niobium contents (0–0.023%) on the microstructure and mechanical properties of HRB500E seismic reinforcement was studied. Results showed that the grain size of ferrite was between 3.6 and 8.3 μm when only V was added. Meanwhile, as the niobium content increases, the ferrite particles are further refined. After adding niobium, the grain contribution increased by 9%. The addition of niobium significantly refined the grain size of HRB500E seismic reinforcement. The second-phase nano-elliptic precipitate is NbC. The precipitated phase is dispersed on the grain boundary and the matrix, and the dislocation density on the matrix promotes the precipitation of NbC particles along the dislocation line. The second-phase precipitation of niobium can form an effective pinning effect and then refine the pearlite spacing. The microhardness and the tensile strength also significantly improved. The yield strength increased from 509 to 570 MPa.Huang ShengLi ChangrongLi ZhiyingZeng ZeyunZhai YongqiangWang JieLiu ZhanlinZhuang ChanglingDe Gruyterarticleseismic reinforcementmicrostructureslice spacingyield strengthTechnologyTChemical technologyTP1-1185Chemicals: Manufacture, use, etc.TP200-248ENHigh Temperature Materials and Processes, Vol 40, Iss 1, Pp 300-309 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	seismic reinforcement microstructure slice spacing yield strength Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
spellingShingle	seismic reinforcement microstructure slice spacing yield strength Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248 Huang Sheng Li Changrong Li Zhiying Zeng Zeyun Zhai Yongqiang Wang Jie Liu Zhanlin Zhuang Changling Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions
description	HRB500E seismic steel bars are mainly used in high-rise buildings near the seismic zone. The influence of different niobium contents (0–0.023%) on the microstructure and mechanical properties of HRB500E seismic reinforcement was studied. Results showed that the grain size of ferrite was between 3.6 and 8.3 μm when only V was added. Meanwhile, as the niobium content increases, the ferrite particles are further refined. After adding niobium, the grain contribution increased by 9%. The addition of niobium significantly refined the grain size of HRB500E seismic reinforcement. The second-phase nano-elliptic precipitate is NbC. The precipitated phase is dispersed on the grain boundary and the matrix, and the dislocation density on the matrix promotes the precipitation of NbC particles along the dislocation line. The second-phase precipitation of niobium can form an effective pinning effect and then refine the pearlite spacing. The microhardness and the tensile strength also significantly improved. The yield strength increased from 509 to 570 MPa.
format	article
author	Huang Sheng Li Changrong Li Zhiying Zeng Zeyun Zhai Yongqiang Wang Jie Liu Zhanlin Zhuang Changling
author_facet	Huang Sheng Li Changrong Li Zhiying Zeng Zeyun Zhai Yongqiang Wang Jie Liu Zhanlin Zhuang Changling
author_sort	Huang Sheng
title	Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions
title_short	Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions
title_full	Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions
title_fullStr	Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions
title_full_unstemmed	Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions
title_sort	quantitative analysis of microstructure and mechanical properties of nb–v microalloyed high-strength seismic reinforcement with different nb additions
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/609af94824094e3ba49805bc999ccf91
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_version_	1718371669886631936

Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions

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