The effect of microstructural characteristics of pearlite on the mechanical properties of hypereutectoid steel

Effect of interlamellar spacing on the elastoplastic behavior of C70 pearlitic steel: Experimental results and self-consistent modeling

“…These results are consistent with previous investigations on eutectoid [16], hyper-eutectoid [21,27] and hypo-eutectoid [2,19,21] steels.…”

“…As a result, when the interlamellar spacing is large, dislocations move more freely in the ferrite zone, resulting in lower yielding limit (r y ) and ultimate tensile strength (UTS). This result is consistent with previous work performed on the eutectoid steels [2,16,18,27].…”

“…The exponent m is classically equal to (À2) for hypo and hypereutectoid steels [2,27] and reconsidered to be equal to (À1) in the modified Hall-Petch relation in order to give a physical validation of friction stress r 0 in the case of eutectoid steels [17,18]. Indeed, the representation of experimental results using classical Hall Petch relation (Sp À2 ) leads to a negative intercept r 0 , which has no apparent physical meaning.…”

Distribution and Anisotropy of Dislocations in Cold-drawn Pearlitic Steel Wires Analyzed Using Micro-beam X-ray Diffraction

“…[5][6][7][8][9][10] Zhang et al observed the dislocation configuration in ferrite lamellae using transmission electron microscopy and reported that the most of the dislocations were spread in the ferrite lamellae with the two ends of the line located at the steps in the ferrite/cementite boundaries. 8) Since the pearlitic lamellae align the drawing direction, the dislocation configuration can introduce anisotropic characteristics of dislocations into the cold-drawn wire.…”

Influence of Microstructure on Strength and Ductility in Fully Pearlitic Steels

“…Pearlitic steels exhibit an increasing yield stress with lowering interlamellar spacing in such a manner that a Hall-Petch type equation can be fitted to reproduce the relationship between microstructure and strength [1][2][3][4][5][6][7][8][9][10][11]. However, in some materials, such as cold-drawn pearlitic steel wires, the orientation of microstructure (ferrite and cementite lamellae almost fully oriented in the drawing direction) makes the classical Hall-Petch fitting not applicable, as shown in [12], and only a modified Hall-Petch relationship between yield stress and pearlite interlamellar spacing is applicable, as demonstrated in a more recent paper [13].…”