Topic
Pearlite
About: Pearlite is a research topic. Over the lifetime, 6028 publications have been published within this topic receiving 65695 citations.
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TL;DR: In this article, Nb-V-Ti microalloyed, hot-rolled, high strength automotive steel for usage in heavy-duty truck wheeldiscs and wheel-rims, appropriate cooling processes were designed, and microstructures and comprehensive mechanical properties (tension, bending, hole expansion, and Charpy impact) of the tested steels at two cooling schedules were studied.
41 citations
01 Jan 2002
TL;DR: In this article, the influence of common steel impurities on steel mechanical properties is discussed. But the influence is not limited to typical impurities, but also to trace elements such as As, Sn, Sb, Se, Cu, Pb, and Bi.
Abstract: The demand for cleaner steels increases every year. In addition to lowering non-metallic oxide inclusions and controlling their morphology, composition and size distribution, clean steel requires lowering other residual impurity elements such as sulfur, phosphorus, hydrogen, nitrogen and even carbon [1, , and trace elements such as As, Sn, Sb, Se, Cu, Pb, and Bi. Table I lists the influence of common steel impurities on steel mechanical properties . Table I Influence of typical impurities on mechanical properties [1] Element Form Mechanical properties affected S,O Sulfide and oxide inclusions • Ductility, Charpy impact value, anisotropy • Formability (elongation, reduction of area and bendability) • Cold forgeability, drawability • Low temperature toughness • Fatigue strength Solid solution • Solid solubility (enhanced), hardenability Settled dislocation • Strain aging (enhanced), ductility and toughness (lowered) Pearlite and cementite • Dispersion (enhanced), ductility and toughness (lowered) C,N
41 citations
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TL;DR: In this paper, the authors derived the constitutive law of the material from a balance between dislocation multiplication and annihilation rates, and predicted a linear dependence of the flow stress with the reciprocal interlamellar spacing, and a stress saturation for very small spacings.
Abstract: Dislocation mechanisms responsible for mechanical properties of nanoscaled multilayers are studied using the example of heavily drawn pearlitic steel wires. Two specific types of dislocation source are observed during transmission electron microscopy in situ straining experiments: one dislocation source operates at wide interlamellar spacings by dislocation propagation in ferrite around cementite islands; the other consists of dislocations bulging in ferrite from interfaces, and is more likely to operate at narrow interlamellar spacings. The constitutive law of the material is derived from a balance between dislocation multiplication and annihilation rates, and predicts a linear dependence of the flow stress with the reciprocal interlamellar spacing, and a stress saturation for very small spacings.
41 citations
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TL;DR: In this article, the effects of microstructural features such as interlamellar spacing, prior austenite grain size (AGS), and carbon content, on mechanical properties have been investigated for fully pearlitic steels containing 052 and 082 wt-%C.
Abstract: The effects of microstructural features, such as interlamellar spacing, prior austenite grain size (AGS), and carbon content, on mechanical properties have been investigated for fully pearlitic steels containing 052 and 082 wt-%C Interlamellar spacing and prior AGS had significant influence on strength and ductility of eutectoid steels While interlamellar spacing and prior AGS had a significant influence on the ductility of eutectoid steels, the carbon content showed a stronger effect on ductility than interlamellar spacing and prior AGS for fully pearlitic steels with various carbon contents The carbon content in steels controls the discontinuous nature, the thickness, and the volume fraction of cementite in pearlite Therefore, hypoeutectoid steels show the superior reduction of area than eutectoid steels in all tested ranges of interlamellar spacing, in spite of the various prior AGS
41 citations
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TL;DR: In this paper, a study involved fully pearlitic wires of seven different diameters (5.5-1.6mm) and all samples were laboratory annealed to re-austenitize and were then air-cooled to reform the pearlite structure.
41 citations