Microstructure and mechanical properties of micro alloyed high strength low carbon structural steels

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00639196" target="_blank" >RIV/68378271:_____/25:00639196 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0370261" target="_blank" >https://hdl.handle.net/11104/0370261</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.vacuum.2025.114707" target="_blank" >10.1016/j.vacuum.2025.114707</a>

Result language

angličtina

Original language name

Microstructure and mechanical properties of micro alloyed high strength low carbon structural steels

Original language description

Mechanical properties of structural steel are inherently tied to their microstructural characteristics, which hugely depends on the alloy composition. This research examines the microstructural characteristics and tensile properties of three hot-rolled E450 structural steels. The primary distinction among the three steels lies in their carbon and manganese (Mn) contents. The microstructural evolution was correlated with mechanical properties. Microstructural analysis revealed the formation of a ferrite–pearlite microstructure. Electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) analyses were conducted to find the dominant strengthening mechanisms in all three steels. The steel with lower carbon and higher manganese content exhibited superior yield strength (580 ± 16 MPa) and tensile strength (657 ± 21 MPa), attributed to grain refinement, a higher low-angle grain boundary (LAGB) fraction, increased kernel average misorientation (KAM), and globular pearlite along the grain boundary, although with reduced elongation (~20.15 %). Conversely, the steel with higher carbon and lower manganese content shows coarser pearlitic lamellae and a greater proportion of high angle grain boundaries (HAGBs), leading to lower strength but enhanced ductility and hardness. These findings reinforce that microalloying and compositional tuning play critical role in microstructural development and mechanical performance of E450 structural steels.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

<a href="/en/project/EH22_008%2F0004573" target="_blank" >EH22_008/0004573: Breakthrough Laser Technologies for Smart Manufacturing, Space and Bio-Tech Applications</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Vacuum

ISSN

0042-207X

e-ISSN

1879-2715

Volume of the periodical

242

Issue of the periodical within the volume

Dec

Country of publishing house

GB - UNITED KINGDOM

Number of pages

6

Pages from-to

114707

UT code for WoS article

001568765800001

EID of the result in the Scopus database

2-s2.0-105014912906