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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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23 Jan 2017-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the effect of microstructure evolution on the anisotropic fracture behaviors of cold drawing pearlitic steels was investigated by conducting an in situ tension test with scanning electron microscopy (SEM), TEM, and electro backscatter diffraction (EBSD).
Abstract: The effect of microstructure evolution on the anisotropic fracture behaviors of cold drawing pearlitic steels was investigated by conducting an in situ tension test with scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electro backscatter diffraction (EBSD). Results revealed three patterns of crack propagation in the pearlitic microstructure: shear cracking, cracking along the pearlite colony interface, and cracking with respect to pearlite phase boundary. The crack propagation mode is mainly determined by shear cracking as strain increases because of the successive microstructure evolution. After cold drawing is obtained from the strain of e=0 to e=0.8, the crack propagation path became deflected with the anisotropic fracture behavior. As the strain increases to 1.6, the degree of deflection decreases. Combined with the main function of shear cracking in crack propagation, the gradual formation of ferrite texture causing the variation of grain orientation distribution with respect to tensile axis also affects the anisotropic fracture behavior.
25 citations
TL;DR: In this paper, the grain growth behavior of austenite reversely transformed from ferrite/pearlite (F/P)-banded and non-banded steels has been studied.
Abstract: The grain growth behavior of austenite reversely transformed from ferrite/pearlite (F/P)-banded and non-banded steels has been studied. It was found that the grain-coarsening temperature [the temperature at which abnormal grain growth (AGG) occurs] of the initially banded F/P structure is quite low compared with that of the non-banded sample. In the F/P-banded sample, the abnormal grains always originate from the former ferrite region. The occurrence of AGG is essentially attributable not to the austenite nucleation process during heating but to the grain growth process after the completion of austenizing. It was proposed that the lowered grain-coarsening temperature in the banded structure is due to the non-uniform pinning-effect of AlN precipitates between former ferrite and pearlite regions.
25 citations
TL;DR: In this article, the electron backscatter diffraction/Wilkinson method was used to visualize the elastic strain and its distribution in a pearlite structure by means of electron microscopy.
25 citations
TL;DR: In this article, a theoretical and experimental study of the growth kinetics of pearlite in a 0.4C-1.6 Mn medium carbon steel was performed, and the transition temperature between local equilibrium (LE) and no partition local equilibrium growth mechanisms was theoretically determined.
25 citations
TL;DR: In this paper, low carbon steel AISI 1020 was subjected to high pressure torsion (HPT) with 6.0 GPa pressure through 1/4-5 turns.
Abstract: Low-carbon steel AISI 1020 was subjected to high-pressure torsion (HPT) with 6.0 GPa pressure through 1/4–5 turns. The microstructures of the samples in each turn were studied by means of X-ray diffraction (XRD) analyzing the changes in micro-strain, crystallite size and lattice parameter. Vickers testing was utilized to study the microhardness behavior of the samples subjected to HPT processing. The morphology evolution of the samples and especially the changes in ferrite and pearlite structures were studied for different numbers of turns using scanning electron microscopy (SEM).
25 citations