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Showing 1 to 14 of 14 for “"microalloying"”.
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Effect of microalloying on pearlite transformation of high carbon wire steels
Microalloying has been shown to improve strength in eutectoid steels for wire applications, and previous work on vanadium-microalloyed eutectoid steels showed delayed pearlite transformation with additions of niobium and accelerated pearlite transformation with additional nitrogen. This study …
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The effect of microalloying on the morphology of austenite during hot working.
Studies have been made of the effects of thermo-mechanical treatment variables on the recrystallization of austenite, the transformation of austenite and precipitation strengthening in C-Hn steel containing niobium, niobium plus vanadium, vanadium and vanadium plus nitrogen. The amounts of niobium …
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Effects of vanadium microalloying of 1080 steel on pearlite transformation kinetics and microstructural development
The effects of V alloying on the pearlite transformation kinetics and microstructure in 1080 steel were evaluated. Two industrial wire rod steels, 1080 and 1080V with a 0.035 wt pct V addition, were isothermally heat treated using dilatometry to assess pearlite transformation rates. A detailed …
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Development of bimodal grain structures and their effect on toughness in HSLA steel
… cast HSLA steel slabs with varying microalloying additions (Ti, Nb and V) were reheated to temperatures in the range 1000-1300 °C and deformed at 1110 °C and 980 °C temperatures in Gleeble 3500. The interdendritic segregation during continuous casting and the consequent inhomogeneous …
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Bauschinger effect in Nb and V microalloyed line pipe steels
… content, to increase weldability, with increased microalloying element content, to provide grain refinement, solid solution and precipitation strengthening. During the UOE forming of large diameter (more than 400 mm) welded pipes the strength drop from plate to pipe, as a result of reverse …
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Assessment of the microstructure and torsional fatigue performance of an induction hardened vanadium microalloyed medium-carbon steel
Vanadium microalloying of medium-carbon bar steels is a common practice in industry for a number of hot rolled as well as forged and controlled-cooled components. However, use of vanadium microalloyed steels has expanded into applications beyond their originally designed controlled-cooled …
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Microstrain Partitioning, TRIP Kinetics and Damage Evolution in Third Generation Dual Phase and TRIP-Assisted Advanced High Strength Steels
… to achieve this strength-ductility balance is by microalloying to promote grain refinement, the introduction of precipitates, and the effective use of plasticity enhancing mechanisms. Specifically, the ability to tailor the stability of retained austenite during deformation has been crucial in …
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Strukturbildungsprozesse und Struktur-, Eigenschafts-Relationen in mikrolegierten Schmiedestählen nach thermomechanischer Behandlung mit variierenden Abkühlkonzepten
… on the variation of process parameters and microalloying as well as the relations between the final microstructure and resulting mechanical properties.
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Niobium in Microalloyed Rail Steels
… purpose of the current work is to develop a Nb-microalloying strategy in the context of high-carbon pearlitic and cementite-free bainitic steels. The conventional methods do not leave the critical regions of a rail section in a suitably processed state. An attempt has been made for the first …
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Directional Recrystallization of an Additively Manufactured Oxide Dispersion-Strengthened Nickel-Base Superalloy
… of a liquid phase, annealing twins, and aluminum microalloying additions on recrystallization kinetics. Conventional wrought ODS alloys achieve coarse columnar grains through directional recrystallization (DRX) heat treatments. The main goal of this study was to assess whether directional …
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Hot ductility of TWIP steels
… was likely to be worse than the simpler microalloying free TWIP steels as was confirmed. Increasing the cooling rate from 60 to 180oC/min after melting caused the ductility to further deteriorate and high N levels produced only a small reduction in the ductility, probably because …
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Synthesis, characterization, and properties of carbide dispersion-strengthened tungsten alloys for use as a plasma-facing material in nuclear fusion reactors
… at grain boundaries. It is theorized that by microalloying tungsten with transition metal carbides that capture the oxygen atoms, the impurity distribution can be altered to beneficially impact the mechanical properties. Through the advent of advanced powder processing techniques such as Spark …
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Deciphering the role of dispersoids in dispersion-strengthened tungsten alloys on the mechanical properties and irradiation- driven response under nuclear fusion reactor-relevant conditions
… at grain boundaries. It is theorized that by microalloying tungsten with transition metal carbides that capture the oxygen atoms, the impurity distribution can be altered to beneficially impact the mechanical properties. Additionally, altering the interface concentration and type can increase …
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Einfluss der Prozesskette auf die Feinkornbeständigkeit von mikrolegierten Einsatzstählen
Considering the processing of case hardening steel components, the machining as well as the heat treatment offer great capability for cost savings. By increasing the carburising temperature from today approximately 940°C up to e.g. 1050°C significant process time reductions are achievable due to …