Microstructure and Properties in Metals and Alloys, 4th Edition

Topic Information

Dear Colleagues,

Following the three previous topic volumes (Microstructure and Properties in Metals and Alloys, volumes 1, 2, and 3), this new Topic is a collection of research contributions that explore the crucial role of microstructure design in achieving desired material properties. This Topic focuses on the relationship between microstructure and mechanical properties, fatigue resistance, wear resistance, and corrosion resistance in metals and alloys. This Topic also welcomes contributions related to welding processes. By providing a comprehensive overview of the interplay between microstructures and their properties, this resource serves as a valuable reference for researchers and engineers working in materials science, aiming to enhance microstructure design and optimize properties for different applications.

Dr. Andrea Di Schino
Dr. Claudio Testani
Dr. Robert Bidulský
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Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Materials materials	3.2	6.4	2008	15.2 Days	CHF 2600	Submit
Crystals crystals	2.4	5.0	2011	12.7 Days	CHF 2100	Submit
Metals metals	2.5	5.3	2011	18 Days	CHF 2600	Submit
Coatings coatings	2.8	5.4	2011	14.7 Days	CHF 2600	Submit
Alloys alloys	-	3.2	2022	24.7 Days	CHF 1000	Submit

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34 pages, 18226 KB  

Open AccessArticle

The Vanadium Micro-Alloying Effect on the Microstructure of HSLA Steel Welded Joints by GMAW

by Giulia Stornelli, Bryan Ramiro Rodríguez-Vargas, Anastasiya Tselikova, Rolf Schimdt, Michelangelo Mortello and Andrea Di Schino

Metals 2025, 15(10), 1127; https://doi.org/10.3390/met15101127 - 10 Oct 2025

Viewed by 335

Abstract

Structural applications that use High-Strength Low-Alloy (HSLA) steels require detailed microstructural analysis to manufacture welded components that combine strength and weldability. The balance of these properties depends on both the chemical composition and the welding parameters. Moreover, in multi-pass welds, thermal cycling results [...] Read more.

Structural applications that use High-Strength Low-Alloy (HSLA) steels require detailed microstructural analysis to manufacture welded components that combine strength and weldability. The balance of these properties depends on both the chemical composition and the welding parameters. Moreover, in multi-pass welds, thermal cycling results in a complex Heat-Affected Zone (HAZ), characterized by sub-regions with a multitude of microstructural constituents, including brittle phases. This study investigates the influence of Vanadium addition on the microstructure and performance of the HAZ. Multi-pass welded joints were manufactured on 15 mm thick S355 steels with different Vanadium contents using a robotic GMAW process. A steel variant containing both Vanadium and Niobium was also considered, and the results were compared to those of standard S355 steel. Moving through the different sub-regions of the welded joints, the results show a heterogeneous microstructure characterized by ferrite, bainite and martensite/austenite (M/A) islands. The presence of Vanadium reduces carbon solubility during the phase transformations involved in the welding process. This results in the formation of very fine (average size 11 ± 4 nm) and dispersed precipitates, as well as a lower percentage of the brittle M/A phase, in the variant with a high Vanadium content (0.1 wt.%), compared to the standard S355 steel. Despite the presence of the brittle phase, the micro-alloyed variants exhibit strengthening without loss of ductility. The combined presence of both hard and soft phases in the HAZ provides stress-damping behavior, which, together with the very fine precipitates, promises improved resistance to crack propagation under different loading conditions. Full article

(This article belongs to the Topic Microstructure and Properties in Metals and Alloys, 4th Edition)

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