Results 181 to 190 of about 5,370 (232)
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Influence of microalloy type and content on induced precipitation kinetics in microalloyed steels
Steel Research, 1996Using torsion tests, and applying the back extrapolation method, the statically recrystallized fraction has been determined for low carbon microalloyed steels with different V, Nb and Ti contents, at different temperatures and an equivalent strain of 0.20%.
Sebastián F. Medina, Alberto Quispe
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Hydrogen in microalloyed steels
Steel Research, 2001To understand and control hydrogen induced cracking and stress corrosion cracking, the processes of hydrogen absorption, diffusion and trapping are of interest. Fundamentals of these processes are described and of the determination of permeation coefficient, diffusivity and solubility of H in iron and steels, using the electrochemical double cell. With
Grabke, H., Gehrmann, F., Riecke, E.
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Microstructure of the microalloyed NiAl–V eutectics
Materials Letters, 2002This study addresses the need for advanced high-temperature materials in aerospace and energy sectors by investigating the Al-Nb-Nisystem, specifically focusing on the impact of nickel addition on the Al3Nb-Nb2Al eutectic and the discovery of novel ternary eutectic reactions.
MILENKOVIC, SRDJAN, Caram, Rubens
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Journal of Iron and Steel Research International, 2021
Effect of titanium microalloying on the microstructure and mechanical properties of vanadium microalloyed steels for hot forging was studied. Titanium microalloying improves the mechanical properties mainly through refining the austenite grains. When the heating temperature is in the range of 1050–1300 °C, the austenite grain diameter is decreased from
Fan Zhao +4 more
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Effect of titanium microalloying on the microstructure and mechanical properties of vanadium microalloyed steels for hot forging was studied. Titanium microalloying improves the mechanical properties mainly through refining the austenite grains. When the heating temperature is in the range of 1050–1300 °C, the austenite grain diameter is decreased from
Fan Zhao +4 more
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Fatigue of Microalloyed Bar Steels
SAE Technical Paper Series, 2000<div class="htmlview paragraph">The fatigue behavior of five microalloyed steels, processed with hardnesses between 25-28 HRC containing microstructures ranging from precipitation-hardened ferrite-pearlite to bainite, were evaluated in both low cycle (strain controlled) and high cycle (stress controlled fatigue.
John A. Johnson +2 more
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Plasma nitriding of microalloyed steel
Surface and Coatings Technology, 1995Abstract 3icroalloyed or high strength low alloy (HSLA) steels are carbon-manganese steels containing small amounts of Nb, V or Ti. The excellent mechanical properties of these alloys, particularly high yield strength, usually obviate the need for expensive quench and tempering operations.
F. Mahboubi +4 more
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Use of Zirconium in Microalloyed Steels
Advanced Materials Research, 2006In this work, three Zr microalloyed steels with different levels of Zr were compared with plain C-Mn, Nb and Nb-Ti steels. Austenitic grain size was compared as a function of temperature for these steels. A qualitative assessment of the potential of Zr to delay austenite recrystallization, was also undertaken. Of course, the actual use of Zr depends on
A.R.B. Maia +4 more
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Materials Science Forum, 1998
Microalloyed forging steels have been developed to improve the competitiveness of wrought steel components, especially in the automotive sector, by achieving the desired properties in the as-forged condition, thus eliminating the need to subsequently heat treat, straighten and stress relieve the previously specified low alloy steels.
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Microalloyed forging steels have been developed to improve the competitiveness of wrought steel components, especially in the automotive sector, by achieving the desired properties in the as-forged condition, thus eliminating the need to subsequently heat treat, straighten and stress relieve the previously specified low alloy steels.
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Microalloyed steel for railroad wheels
Steel in Translation, 2008Radical improvement in the reliability and longevity of railroad wheels at high train speeds and loads depends primarily on improvements in the properties of wheel steel: increased static and cyclic strength, high- and low temperature strength, and wear resistance, and low likelihood of the formation of martensitic surface zones.
S. Ya. Shipitsyn +4 more
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Microalloying of titanium alloys
Metal Science and Heat Treatment, 19791. Microalloying with zirconium, hafnium, and REM improves the mechanical properties of α+β and β alloys due to grain refining, lower concentration of impurities in grain boundaries, and more dispersed and even decomposition of metastable phases during aging, which is associated with the increasingly negative values of the heat of formation of ...
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