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 paper, the possibility of alternatives to this microstructure for large scale applications is discussed in the context of controllable-rolled bainitic steels, accelerated cooled steels and inoculated steels.
Abstract: Structural steels based on a mixed microstructure of allotriomorphic ferrite and pearlite have a well-established history of cost-effectiveness and reliability. The purpose of this paper is to review the possibility of alternatives to this microstructure for large scale applications. Controlled-rolled bainitic steels, accelerated cooled steels, ultra-low carbon bainitic steels and inoculated steels are discussed in this context.
22 citations
01 Feb 1983
TL;DR: In this article, the mechanism of wear-particle formation during unlubricated sliding wear of several carbon and alloy steels has been investigated by scanning (SEM) and transmission electron microscopy (TEM).
Abstract: The mechanism of wear-particle formation during unlubricated sliding wear of several carbon and alloy steels has been investigated by scanning (SEM) and transmission electron microscopy (TEM). Individual debris particles are plate-like and typically 200 to 400 nm in thickness. The thinner particles are generally iron oxides except at low temperatures or in inert atmospheres when predominantly metallic particles result. The mean debris-particle width was 1 to 2 ..mu..m. TEM revealed a fine dislocation cell structure typical of large strain deformation to a depth of 10 to 50 ..mu..m. The subsurface cell dimensions and bending of pearlite colonies indicate that the shear strain near to the surface is at least 5. In many instances, a 200 to 300 nm wide zone of lower dislocation density, indicative of recovery, we noted immediately below the surface. Some cracks formed along dislocation cell walls at the boundary of the recovered zone; others were associated with decohesion of particle interfaces of subgrain triple points. Some oxidation then occurs during separation of the platelet from the parent material as a consequence of the highly pyrophoric nature of thin metal flakes. The sequence of the dry sliding wear process is discussed. 16 figures.
22 citations
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TL;DR: The combination of the categorizing and pattern-recognizing methods provides a total solution for automatic quantification of a wide range of steel microstructures.
22 citations
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TL;DR: In this paper, a twin-disc test evaluated the wear resistance and rolling contact fatigue (RCF) of bainitic and pearlitic microstructures obtained from forged micro-alloyed railway wheel steel.
22 citations
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TL;DR: In this paper, the authors examined the plastic flow behavior of a mixture of ferrite + pearlite, cementite + cementite, and austenite+ cementite mixtures in plain carbon steels over the temperature range 500 to 1050 °C, strain rate range 6 x l0−6 to 2 x l 0−2 s−1, and carbon range 0.005C to 1.89C.
Abstract: The plastic-flow behavior of ferrite + pearlite, pearlite + cementite, and austenite + cementite mixtures in plain carbon steels has been examined over the temperature range 500 to 1050 °C, strain-rate range 6 x l0−6 to 2 x l0−2 s−1, and carbon range 0.005C to 1.89C. Up to the eutectoid temperature the strength of the ferrite + pearlite mixture more than doubles as the carbon content increases from 0.005C to 0.7C, so that whereas in low-carbon steels the ferrite is weaker than the higher temperature austenite phase, in eutectoid steels the fully pearlitic structure is stronger than the fully austenitic structure. Manganese and silicon strengthen ferrite more effectively than they do austenite. A 0.17 pct phosphorus addition strengthens the ferrite + pearlite mixture across the range of microstructures from fully ferritic to fully pearlitic. Beyond the eutectoid composition, the amount of proeutectoid cementite does not significantly affect the strength of the pearlite, but above the eutectoid temperature it appreciably strengthens the austenite and cementite mixture at the strain rate of 2 X 10-2 s-1.
22 citations