Quantitative three-dimensional characterization of pearlite spheroidization

Wang, Yuan-Tsung; Adachi, Yoshitaka; Nakajima, Kiyomi; Sugimoto, Yoshimasa

doi:10.1016/j.actamat.2010.05.023

Cited by 61 publications

(31 citation statements)

References 19 publications

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“…4 (a)). 6,7) The regions surrounding the holes have high mean curvatures (red or yellow) in the lamellar structure compared with the near flat plane (green), where it may be considered thermodynamically equivalent to planar surfaces, H=K=0, and so do not provide a thermodynamic motivation for shape change or interface motion. As illustrated in Eq.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, through developments in the manner in which serial sections are collected and in the methods used to reconstruct the 3D morphology of the serial sectioning images, it is possible to gain new insights into the manner in which pearlite spheroidization occurs. In a previous paper, 6,7) it was demonstrated based on a 3D image that there were many morphological faults such as a hole and a fisher in cementite lamellae. Similar morphological faults were also observed by other researchers.…”

Section: Introductionmentioning

confidence: 99%

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Topology and Differential Geometry-based Three-dimensional Characterization of Pearlite Spheroidization

et al. 2012

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Spheroidized pearlite microstructures in three-dimensions (3D) in a 0.8 mass% C-Fe steel under 700°C static annealing was examined focusing on topology and differential geometry. The topological or differential-geometric features of the microstructures were examined by evaluating the genus and the Gaussian/mean curvatures. 3D visualization demonstrated that the holes intrinsic in cementite lamellae are significant morphological features affecting the kinetics of the initial pearlite spheroidization, due to the mean curvature differences between the hole edge and the adjacent flat surface. The hole coalescence and expansion influence not only the morphological evolution, but also the topological characteristics. The genus per unit volume decreases at an earlier spheroidization time due to a decrease in the number of holes and an increase in independent bodies, but increases at longer coarsening time because of a decrease in independent bodies. The distribution area of nonzero probability of the mean and Gaussian curvature decreases with an increase in spheroidization time, which agrees with the increase in the length scale of the microstructures.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Topology and Differential Geometry-based Three-dimensional Characterization of Pearlite Spheroidization

et al. 2012

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“…Interphase boundaries between layers in real pearlite are neither smooth nor flat but there are concavities, convexities and holes. 2,33) These concavity and convexity arouse concentration of stress and the existence of hole should decrease the Orowan stress. Secondly, because of drawing process, tensile residual stress over few hundreds MPa arises near the wire surface.…”

Section: Resultsmentioning

confidence: 99%

Crystal Plasticity Analyses of Scale Dependent Mechanical Properties of Ferrite/Cementite Lamellar Structure Model in Pearlite Steel Wire with Bagaryatsky or Pitsch-Petch Orientation Relationship

Yasuda

Ohashi

2016

ISIJ Int.

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Mechanical properties of simplified model of ferrite/cementite lamellar structure in pearlite steel wire are examined by a strain gradient crystal plasticity analysis. Bagaryatsky and Pitsch-Petch relationships are used to determine crystallographic orientations of ferrite and cementite phases. Obtained results show that yield stress and strain hardening rate increase with reduction of lamellar thickness of ferrite layer and this increase is larger in the model with Bagaryatsky relationship than that with Pitsch-Petch one. Detailed mechanism that leads to this significant change in macroscopic mechanical response is discussed from the view point of dislocations' behavior. Strain incompatibility effect between phases on the mechanical response is shown to be relatively small.

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“…It can promote deeper understanding in the morphology of materials than that of the conventional 2D observation. [32][33][34][35][36][37][38] However, there has not been a study to quantify the relationship between the shapes of micro-crack and microstructures in the ferrite-pearlite steels.…”

Section: D Observation Of Micro-cracks As Cleavage Fracture Initiatimentioning

confidence: 99%

3D Observation of Micro-cracks as Cleavage Fracture Initiation Site in Ferrite-pearlite Steel

et al. 2017

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Quantitative three-dimensional characterization of pearlite spheroidization

Cited by 61 publications

References 19 publications

Topology and Differential Geometry-based Three-dimensional Characterization of Pearlite Spheroidization

Topology and Differential Geometry-based Three-dimensional Characterization of Pearlite Spheroidization

Crystal Plasticity Analyses of Scale Dependent Mechanical Properties of Ferrite/Cementite Lamellar Structure Model in Pearlite Steel Wire with Bagaryatsky or Pitsch-Petch Orientation Relationship

3D Observation of Micro-cracks as Cleavage Fracture Initiation Site in Ferrite-pearlite Steel

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