Correlation of Microstructure Feature with Impact Fracture Behavior in a TMCP Processed High Strength Low Alloy Construction Steel

Zhu, Wenting; Cui, Junjun; Chen, Zhenye; Zhao, Yang; Chen, Liqing

doi:10.1007/s40195-021-01250-0

Cited by 12 publications

(6 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The formation of tearing ridges was attributed to the prevention of crack propagation by high‐angle grain boundaries. [ 40 ] These findings strongly suggest that a large plastic deformation occurred during impact loading, which led to the local stress release at the main crack tips. Also, the impact absorbed energy is closely related with the effective grain size.…”

Section: Resultsmentioning

confidence: 93%

Development of Air‐Cooled Carbide‐Free Bainite/Martensite Multiphase Steel: Transformation Kinetics, Microstructure, and Mechanical Properties

Cheng,

Gao,

Liu

et al. 2023

steel research int.

View full text Add to dashboard Cite

An air‐cooled low‐carbon Mn–Si–Cr alloyed steel with multiphase microstructure of carbide‐free bainite/martensite (CFB/M) is developed. The kinetics of bainitic transformation during air‐cooling process is discussed via considering the transformation latent heat with help of the measured temperature‐cooling curves. Results show that the CFB formed during air cooling can effectively refine the multiphase microstructure and stabilize the film‐like retained austenite that contributes to transformation‐induced plasticity effect upon deformation. An optimum combination of strength, ductility, and toughness of the air‐cooled bainitic steel is achieved (tensile strength: 1418 MPa, total elongation: 15.8%, and Charpy V‐notch impact energy: ≈71 J). The newly developed Mn–Si–Cr alloyed air‐cooled bainitic steel exhibits superior mechanical properties to the commercial 23CrNi3Mo steel but has a much lower alloy cost.

show abstract

Section: Resultsmentioning

confidence: 93%

Development of Air‐Cooled Carbide‐Free Bainite/Martensite Multiphase Steel: Transformation Kinetics, Microstructure, and Mechanical Properties

Cheng,

Gao,

Liu

et al. 2023

steel research int.

View full text Add to dashboard Cite

show abstract

“…The specimens were prepared from a 690 MPa grade HSS steel, which was produced to be aseismic and resistant to fire and corrosion. [17][18][19][20] The chemical composition of the 690 MPa grade HSS steel is provided in Table 1. The values of welding crack susceptibility index (P cm ) and carbon equivalent (C eq ) were 0.23% and 0.48%, respectively, meeting the China National Standard GB/T 19879-2015.…”

Section: Test Specimensmentioning

confidence: 99%

Post‐fire Mechanical Behaviors and the Mechanism of their Influence on a 690 MPa Grade High‐Strength Steel for High‐Rise Buildings

Zhu

Cui

Yan

et al. 2022

steel research int.

View full text Add to dashboard Cite

Herein, the residual mechanical behaviors of a 690 MPa grade high‐strength steel after exposure to fire for an extended duration are investigated, and the factors affecting their variation based on the theories of metallurgy are explored. The corresponding tensile properties and microstructure tests are conducted on this steel soaked at 300–900 °C for 3 h and then cooled in air. The results show that there is negligible influence of temperature on residual mechanical properties at 600 °C or lower. It can be considered that the critical fire temperature is 600 °C, beyond which the strength decreases sharply. This can be attributed to the formation of ferrite and grain coarsening. However, at 900 °C, its residual strength can still maintain approximately half of that at room temperature. It is related to the contribution from fine nanoscaled precipitates of 10–40 nm in size. Compared with steels having the same nominal yield strength, the dependence of residual mechanical properties on elevated temperatures for this steel varies due to the difference in microstructure characteristics. New predicted equations are proposed for this novel structural steel to guide on better prediction of residual mechanical properties in steel structure systems.

show abstract

“…It possesses excellent strength, toughness, weldability, and atmospheric corrosion. Considering facile process flow, controllability, and low cost, a thermomechanical control process (TMCP) allows for weathering steel with comprehensive features [1,2,[6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…TMCP includes controlled rolling and cooling, and the key process parameters impact microstructure and properties like finish rolling temperature [7,9], cooling rate [10,11], and finish cooling temperature [4,6]. Extensive research has been carried out on mechanical properties, focusing on the coordination of microstructure and tensile or impact properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of Finish Rolling Temperature on the Critical Crack Tip Opening Displacement (CTOD) of Typical 500 MPa Grade Weathering Steel

Wu,

Bai,

Zhao

et al. 2023

Metals

View full text Add to dashboard Cite

In this study, the effect of finish rolling temperature on the critical crack tip opening displacement (CTOD) of typical 500 MPa grade weathering steel was elucidated. The microstructures were observed via optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM), and electron back-scattered diffraction (EBSD). The cryogenic fracture toughness and microstructures of steels were analyzed at different finish rolling temperatures (780–840 °C). The results show that a mixed microstructure, i.e., granular bainitic ferrite (GBF), polygonal ferrite (PF), and martensite/austenite (M/A), constituent was formed in each sample. With the decrease of the finish rolling temperature, the GBF content decreased, PF content increased, and the high angle grain boundary (HAGB) number fraction of the matrix increased. Furthermore, the fraction of M/A constituents was increased with reduced average size. The value of CTOD increased significantly from 0.28 to 1.12 mm as the finish rolling temperature decreased from 840 to 780 °C. Both the decrease of M/A constituents and the increase of HAGB increased the cryogenic (−40 °C) fracture toughness of the typical 500 MPa grade weathering steel.

show abstract

Correlation of Microstructure Feature with Impact Fracture Behavior in a TMCP Processed High Strength Low Alloy Construction Steel

Cited by 12 publications

References 27 publications

Development of Air‐Cooled Carbide‐Free Bainite/Martensite Multiphase Steel: Transformation Kinetics, Microstructure, and Mechanical Properties

Development of Air‐Cooled Carbide‐Free Bainite/Martensite Multiphase Steel: Transformation Kinetics, Microstructure, and Mechanical Properties

Post‐fire Mechanical Behaviors and the Mechanism of their Influence on a 690 MPa Grade High‐Strength Steel for High‐Rise Buildings

Effects of Finish Rolling Temperature on the Critical Crack Tip Opening Displacement (CTOD) of Typical 500 MPa Grade Weathering Steel

Contact Info

Product

Resources

About