Dynamic evolution of nanosized NbC precipitates in austenite matrix during deformation and its contribution to strengthening

Shin, Ji Ho; Kong, Byeong Seo; Eom, Hyun Joon; Jang, Changheui; Do, Hyeonsu; Jang, Dongchan

doi:10.1016/j.msea.2021.140816

Cited by 16 publications

(2 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The engineering application and mechanical properties of Nb−alloyed steels are inseparable from the regulation of a microstructure by phase transformation. The addition of Nb in low−carbon steels significantly affects the phase transformation kinetics of ferrite phase transformation, and two effects in general need to be emphasized: (i) Nb in a solid solution tends to segregate at the interface [1,[10][11][12]; and (ii) Nb is a strong carbide−forming element [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Influence of Solute Drag Effect and Interphase Precipitation of Nb on Ferrite Transformation

Cai,

Wei,

Jin

et al. 2024

Materials

View full text Add to dashboard Cite

The significant impact of Nb on ferrite transformation, both in terms of solute drag effect (SDE) and interphase precipitation, was investigated quantitatively. Ferrite transformation kinetics were characterized using thermal expansion experiments and theoretical calculations. The microstructures were characterized using high−temperature confocal laser scanning microscopy (CLSM), a field−emission scanning electron microscope (FESEM), and a transmission electron microscope (TEM). Under a higher driving force, interphase precipitations were observed in the sample with a higher Nb content. A three−dimensional (3D) reconstruction method was used to convert the two−dimensional (2D) image of interphase precipitation into a three−dimensional model for a more typical view. The SDE and interphase precipitation had opposite effects on the kinetics of ferrite transformation. A lower Nb content showed a strong contribution to the SDE, which delayed ferrite transformation. A higher concentration of Nb was expected to enhance the SDE, but the inhibition effect was eliminated by the interphase precipitation of NbC during interfacial migration. Both the experimental results and theoretical calculations confirmed this phenomenon.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Solute Drag Effect and Interphase Precipitation of Nb on Ferrite Transformation

Cai,

Wei,

Jin

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…[16][17][18][19][20][21] Nanoparticles are used as a reinforcing phase to increase the strength of steel owing to the secondary hardening effect. [22][23][24][25][26][27] Introducing nanoparticles with excellent thermostability, high melting point, ultrahigh hardness, high chemical stability, and relatively low density to steel is a proven and effective method for the preparation of high-performance steel. [27][28][29][30][31] Wang [32] reported that nano-TiC ceramic particles can serve as the core of the austenite and prevent austenite from growth attributed to the similar lattice with austenite (face-centered cubic lattice), which is a coherent relationship with austenite.…”

mentioning

confidence: 99%

Effect of Nano‐TiC Ceramic Particles on Microstructures and Properties of High‐Cr Steel under Different Heat‐Treatment Conditions

Chang

Shu

et al. 2023

Adv Eng Mater

View full text Add to dashboard Cite

In order to improve the service life of die steels, many methods have been used to improve their properties. However, some properties may be weakened after different heat treatments. In this study, a novel method of nanoparticle treatment was used to improve the service performance of high Cr steel, and the effect of nano‐TiC ceramic particles on its microstructures and properties under different heat treatment conditions was investigated. After forging and isothermal spheroidization, the nano‐TiC ceramic particles treatment high Cr steel has a mixed grain with equiaxed grain and striated grain. Under different heat treatment conditions, the nano‐TiC reinforced high Cr steel has refined martensite laths, carbides, and a higher content of retained austenite. In contrast, the nano‐TiC ceramic particles reinforced high Cr steel have higher strength and strain, the yield strength (σ0.2), tensile strength (σb), fracture strain, product of strength and strain, and impact toughness of HCS‐51 (HCSN‐51), are 1349 MPa (1531 MPa), 1662 MPa (1770 MPa), 9.4% (12.1%), 12405 MPa·% (18766 MPa·%) and 266 J/cm2 (445 J/cm2), which is 13.5%, 6.5%, 28.7%, 51.3% and 67.3% higher, respectively. The primary strengthening mechanisms included fine‐grain strengthening and precipitation strengthening. The main toughness mechanism was fine‐grain and transformation‐induced plasticity.This article is protected by copyright. All rights reserved.

show abstract

Complex Precipitation Behavior and Mechanism of NbC During Ferrite Transformation in a HSLA Steel

Cai,

Wei,

Jin

et al. 2024

Metall Mater Trans A

View full text Add to dashboard Cite

Dynamic evolution of nanosized NbC precipitates in austenite matrix during deformation and its contribution to strengthening

Cited by 16 publications

References 71 publications

Influence of Solute Drag Effect and Interphase Precipitation of Nb on Ferrite Transformation

Influence of Solute Drag Effect and Interphase Precipitation of Nb on Ferrite Transformation

Effect of Nano‐TiC Ceramic Particles on Microstructures and Properties of High‐Cr Steel under Different Heat‐Treatment Conditions

Complex Precipitation Behavior and Mechanism of NbC During Ferrite Transformation in a HSLA Steel

Contact Info

Product

Resources

About