Effect of Martensite–Austenite Constituent on Low-Temperature Toughness in YS 500 MPa Grade Steel Welds

Kim, In; Nam, Hyunbin; Lee, Myungjin; Nam, Dae-Geun; Park, Yeong-Do; Kang, Nam Jun

doi:10.3390/met8080638

Cited by 13 publications

(3 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, Figure 8d-f reveal that regions exhibiting low band contrast are associated with higher concentrations of C, Mn, and Si. Previous studies [14,25] have noted that the C concentration in MA constituents is significantly higher than in the surrounding matrix, with C and Si being particularly concentrated within the MA phase. The results obtained from Figures 6-8 reveal several key aspects about the microstructural properties of the flange.…”

Section: Resultsmentioning

confidence: 90%

“…The presence of hard MA phases induces stress concentrations at the interface between Additionally, Figure 8d-f reveal that regions exhibiting low band contrast are associated with higher concentrations of C, Mn, and Si. Previous studies [14,25] have noted that the C concentration in MA constituents is significantly higher than in the surrounding matrix, with C and Si being particularly concentrated within the MA phase.…”

Section: Resultsmentioning

confidence: 90%

See 1 more Smart Citation

Microstructural and Mechanical Characterization of Low-Alloy Fire- and Seismic-Resistant H-Section Steel

Kim,

Yu,

Kim

et al. 2024

Metals

View full text Add to dashboard Cite

This study investigates the microstructure and nano-hardness distribution across the thickness of an H-section steel beam, specifically designed for seismic and fire resistance and fabricated using a quenching and self-tempering process. The beam dimensions include a 24 mm thick flange, with flange and web lengths of 300 mm and 700 mm, respectively. Our findings indicate that the mechanical properties across the flange thickness meet the designed criteria, with yield strengths exceeding 420 MPa, tensile strengths of over 520 MPa, and a yield-to-tensile strength ratio below 0.75. Microstructurally, the central part of the flange predominantly consists of granular bainite with a small fraction of martensite–austenite (MA) constituents, while locations closer to the surface show increased acicular ferrite and decreased MA constituents due to faster cooling rates. Furthermore, thermal exposure at 600 °C reveals that while the matrix microstructure remains thermally stable, the MA phase undergoes tempering, leading to a decrease in nano-hardness. These insights underline the significant impact of MA constituents on the elongation properties and stress concentrations, contributing to the overall understanding of the material’s behavior under seismic and fire conditions. The study’s findings are crucial for enhancing the reliability and safety of construction materials in demanding environments.

show abstract

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 90%

Microstructural and Mechanical Characterization of Low-Alloy Fire- and Seismic-Resistant H-Section Steel

Kim,

Yu,

Kim

et al. 2024

Metals

View full text Add to dashboard Cite

show abstract

“…This phenomenon was also observed and reported in a previous study. 14 With respect to the microstructure, GBF and FSP were distributed in the grain boundary of the columnar grain, and fine acicular ferrite (AF) was distributed in the grain, as depicted in Figure 5. The GBF and FSP volume fractions account for 8.3 % in the columnar zones of the 1.05 w/% Mn specimens, whereas they account for 11.4 % in the case of the 1.34 w/% Mn specimens columnar zones.…”

Section: Effect Of Mn On the Microstructure Of The Deposited Metalsmentioning

confidence: 99%

Effect of manganese content on the impact toughness and corrosion resistance of deposited metals of weathering steel

Zhuo¹,

An²,

Ma³

et al. 2020

Mater. Tehnol.

View full text Add to dashboard Cite

In this study the Mn content fluctuations in the deposited metals and their influence on the impact toughness and corrosion resistance were investigated. The experimental results indicated that the deposited metal containing 1.05 w/%Mn when compared with the deposited metal containing 1.34 w/%Mn increased the impact toughness by 40 % and that the increment in energy absorbed by the crack propagation accounted for 88 % of the increment in impact energy. Further, the self-corrosion potential difference between the deposited metals and the weathering steel was less than 20 mV, leading to similar corrosion resistances. The results revealed that the Mn content fluctuations did not significantly influence the self-corrosion potential of the deposited metals; furthermore, the increase in the impact toughness can be attributed to: a) the decrease in the volume fraction of the grain-boundary ferrite and ferrite side plates in the columnar zone, b) an increase in the number of large grain boundaries in the fine-grain reheating zone, and c) the refining of the martensite-austenite constituents.

show abstract

The Formation Analysis of Microscopic Voids in Ductile Material

Ngo

Tran

Nguyen

et al. 2022

Computational Intelligence Methods for Green Technology and Sustainable Development

View full text Add to dashboard Cite

Effect of Martensite–Austenite Constituent on Low-Temperature Toughness in YS 500 MPa Grade Steel Welds

Cited by 13 publications

References 26 publications

Microstructural and Mechanical Characterization of Low-Alloy Fire- and Seismic-Resistant H-Section Steel

Microstructural and Mechanical Characterization of Low-Alloy Fire- and Seismic-Resistant H-Section Steel

Effect of manganese content on the impact toughness and corrosion resistance of deposited metals of weathering steel

The Formation Analysis of Microscopic Voids in Ductile Material

Contact Info

Product

Resources

About