Results 131 to 140 of about 5,912 (181)

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, George Krauss, David K. Matlock   +2 more
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Microalloy steels – the beginning

Materials Science and Technology, 2009
Although steels containing small amounts of vanadium or titanium had long been available, the rapid development and exploitation of microalloy steels was initiated by the recognition of the advantages of adding a small amount of niobium to C–Mn steels.
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Exafs investigation of microalloyed steel

Scripta Metallurgica, 1984
Pour ameliorer la composition et la fabrication des aciers microallies on a besoin de methodes precises pour mesurer les quantites d'elements de microalliage presents en solution solide ou sous forme de fins precipites et pour determiner la structure de ces precipites.
G.P. Huffman, F.E. Huggins, L.J. Cuddy, F.W. Lytle, R.B. Greegor   +4 more
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Study of cast microalloyed steels

Materials Science and Technology, 2003
AbstractImproved grades of cast steels were prepared by microalloying C–Mn–Cr steels (0.15–0.22C, wt-%) with V (0.1)+Ti (0.01) or V (0.11)+Nb (0.034)+Ti (0.01) combinations. When quenched and tempered an ultimate tensile strength (UTS) of the order of 784–1078 MPa (80–110 kg mm2) and an elongation ranging from 10 to 35% were achieved.
B.D. Jana, A.K. Chakrabarti, K.K. Ray
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Microalloyed Low-Carbon Multiphase Steels

steel research international, 2015
Actual multiphase steels guarantee tensile strengths in different grades between 500 and 1000 MPa. Specifications and standards permit a wide field of chemical compositions. On one hand, carbon amounts higher than 0.12% are not seldom for grades exceeding 600 MPa tensile strength.
Volker Flaxa, Sascha Kluge
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Ductility of Microalloyed Steels during Hot Deformation

Materials Science Forum, 2010
The ductility behaviour experienced by steels for linepipe (LP) applications in a temperature range generally from 700°C to 1200°C is a widely studied subject in steel research, especially for its implication on cracking during continuous casting and rolling.
A. Mannucci, E. Anelli, M. Armengol, VEDANI, MAURIZIO   +3 more
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Strengthening Nb–V microalloyed steel

Materials Science and Technology, 1991
AbstractA process for producing a low pearlite steel containing small amounts of niobium and vanadium is described. Controlling rolling followed by a short annealing treatment results in grain refinement, precipitation strengthening, and matrix recovery, and produces plate with improved strength at increased toughness levels.
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Niobium microalloying in rail steels

Materials Science and Technology, 2017
Rail steels rely primarily for their properties on wear and rolling-contact-fatigue resistance. These properties, together with toughness, can be optimised by implementing thermo-mechanical processing during rail manufacturing, assisted by controlled additions of strong carbide-forming microalloying elements. Niobium can be used at low concentrations,
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Compositional evolution of microalloy carbonitrides in a Mo-bearing microalloyed steel

Scripta Materialia, 2013
Molybdenum is known to affect microalloy precipitate evolution during processing in ferrite and austenite, but a unified explanation of the role of Mo in precipitate evolution is still lacking. Experiments and thermodynamic calculations indicate that Mo is incorporated into (Nb,Mo)(C,N) precipitates both in the hot-rolled condition and after reheating ...
Enloe, CM, Findley, KO, Parish, CM, Miller, MK, De Cooman, BC, Speer, JG   +5 more
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Cleavage fracture of microalloyed forging steels

Scripta Metallurgica et Materialia, 1995
Microalloying in medium C forging steels together with new processes such as thermomechanical treatments or direct quenching from the finishing forging temperature are being used to avoid expensive heat treatments and to obtain required optimum mechanical properties directly after forging.
M.A. Linaza, J.L. Romero, J.M. Rodríguez-Ibabe, J.J. Urcola   +3 more
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