Results 51 to 60 of about 463 (184)

Influence of Oxygen Contamination on the Genesis of Nonmetallic Inclusions in a Microalloyed Steel

steel research international, EarlyView.
Oxygen contamination during melting of steels strongly affects the evolution of nonmetallic inclusions. Controlled remelting experiments, combined with SEM/EDS analysis and thermodynamic simulations, reveal how reoxidation promotes the transformation of alumina‐based inclusions into complex FeO–MnO oxides and other interactions.
Leandro Pianca Prandi, Felipe Fardin Grillo, Estéfano Aparecido Vieira   +2 more
wiley   +1 more source

An improved cellular automaton model of dynamic recrystallization and the constitutive model coupled with dynamic recrystallization kinetics for microalloyed high strength steels

Journal of Materials Research and Technology
This study analyzed the deformation behavior of Nb–Ti microalloyed high strength steel at strain rates of 0.001–0.1 s−1 and deformation temperatures of 1050–1150 °C using hot compression tests.
Feng Zhou, Jia Guo, Yan Zhao, Xiaohong Chu, Lei Liu, Changshi Zhou, Zhengzhi Zhao   +6 more
doaj   +1 more source

The engineering behind the mechanical properties enhancement on HSLA steels, microalloyed with niobium: Effects of boron and titanium

Journal of Materials Research and Technology, 2020
The influence of boron on the mechanical properties of niobium microalloyed steels was investigated by comparing the variations of rolled strips with and without boron and titanium addition.
Alisson Paulo de Oliveira, Berenice Mendonça Gonzalez   +1 more
doaj   +1 more source

Control of the Austenite Recrystallization in Niobium Microalloyed Steels [PDF]

Materials Science Forum, 2010
The use of heavy gauge steel sheets for structural applications very often requires a combination of high yield strength and adequate toughness. The most cost effective way to realize a high yield strength and a high ductility in a low alloyed steel is grain refinement. In industrial practice, this refinement is realized by controlled processing.
Vervynckt, Stephanie, Verbeken, Kim, Thibaux, Philippe, Liebeherr, Martin, Houbaert, Yvan   +4 more
openaire   +3 more sources

Influence of Tramp Elements on Phase Transformations, Structure, and Properties of Scrap‐Based Steels: A Focused Review of Recent Developments

steel research international, EarlyView.
This review explains how impurities from recycled scrap affect steel production and performance. Even small amounts (far below 1%) of these impurities can change how steel behaves during fabrication but also affect the properties of the end product. With better understanding and targeted countermeasures, these challenges can be managed, enabling wider ...
Oleksandr Glushko, Ronald Schnitzer
wiley   +1 more source

Tailoring Microstructure and Hardness in Maraging 300 Steel via 2.4 wt.% Niobium Addition and Controlled Aging Treatments

steel research international, EarlyView.
High Nb (2.4 wt.%) addition to Maraging 300 steel drives lattice distortion and nanoscale Nb–Mo‐rich precipitation, confirmed by energy‐dispersive X‐ray spectroscopy mapping (Mo ~5.4 wt.%, Nb ~2.5 wt.%). Nanoindentation reveals strong matrix hardening (H >4.8 GPa) at 480°C aging, while 560°C induces ~1.92 vol.% reverted austenite, enabling tunable ...
Laylla Sharon B. Peixoto, Mohammad Masoumi, Luís Henrique N. de Lima, Marcos Natan da Silva Lima, Luis Flávio Gaspar Herculano, Isabel Ferreira de Barros, Geronimo Perez, Maria Vittoria Moraschini Reis, Hamilton Ferreira Gome Abreu, Marcelo J. Gomes da Silva   +9 more
wiley   +1 more source

Interaction between Microalloying Additions and Phase Transformation during Intercritical Deformation in Low Carbon Steels

Metals, 2019
Heavy gauge line pipe and structural steel plate materials are often rolled in the two-phase region for strength reasons. However, strength and toughness show opposite trends, and the exact effect of each rolling process parameter remains unclear.
Unai Mayo, Nerea Isasti, Jose M. Rodriguez-Ibabe, Pello Uranga   +3 more
doaj   +1 more source

Influence of Surface Roughness and Temperature on Niobium Cathodic Cage Duplex Treatment Applied to VP20TS Steel

steel research international, EarlyView.
Niobium cathodic cage duplex treatment is applied to VP20TS steel to evaluate the influence of surface roughness and temperature on coating performance. Results show that higher temperatures promote thicker nitride layers and increased microhardness, while finer surface preparation enhances adhesion and wear resistance, revealing optimal conditions for
Alan Bruno Costa Cardoso, Ediones Maciel de Sousa, João Rodrigues de Barros Neto, Leandro Almeida Silva, Luciana Sgarbi Rossino, Rômulo Ribeiro Magalhães de Sousa, Marcos Guilherme Carvalho Braulio Barbosa   +6 more
wiley   +1 more source

Weldability of microalloyed high strength steels TStE 420 and S960QL

Metalurgija, 2014
The paper presents research of weldability of microalloyed high strength steels TStE 420 and S960QL after weld thermal cycle simulation. Beside mechanical properties hardness and impact strength, the microstructures of characteristic weld thermal cycled ...
M. Dunđer, T. Vuherer, I. Samardžić
doaj  

Forge and Heat-treatments in Microalloyed Steels – A Review

High Temperature Materials and Processes, 2013
Improved designs, mostly for lightweight component manufacturer, have been made for improvement of forging and heat-treatment techniques. Low temperature precipitation strengthening and resistance to austenite grain size coarsening at reheat temperature ...
Raj A., Goswami B., Kumar S.B., Ray A.K.
doaj   +1 more source