Development of fully automated serial-sectioning 3D microscope and topological approach to pearlite and dual-phase microstructure in steels

Yoshitaka Adachi, Naoko Sato, Mayumi Ojima, Makoto Nakayama, Yuan Tsung Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

Using a newly developed fully automated serial-sectioning three-dimensional (3D) microscope, Genus-3D, and a conventional dual-beam SEM, we examined ferrite-martensite dual-phase and eutectoid pearlite microstructures. In particular, we consider the topology and differential geometry. Genus, Euler characteristics, Gaussian curvature, and mean curvatures were obtained from 3D reconstructions. A variation in the martensite morphology in dual-phase steel, i.e., connectivity, was examined to understand the ductile fracture mechanism. In addition, we investigated the 3D morphological variation of lamellar cementite in pearlite during spheroidizing. This 3D observation revealed many holes and fissures in cementite lamellae, which potentially accelerate the spheroidization. The disintegration of lamellar structure into particles was discussed with respect to surface area change per unit volume and local surface morphology (i.e., curvature).

Original languageEnglish
Title of host publication1st International Conference on 3D Materials Science 2012, 3DMS 2012
PublisherJohn Wiley and Sons Inc.
Pages37-42
Number of pages6
ISBN (Print)9781627489331
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event1st International Conference on 3D Materials Science 2012, 3DMS 2012 - Seven Springs, PA, United States
Duration: 2012 Jul 82012 Jul 12

Publication series

Name1st International Conference on 3D Materials Science 2012, 3DMS 2012

Conference

Conference1st International Conference on 3D Materials Science 2012, 3DMS 2012
Country/TerritoryUnited States
CitySeven Springs, PA
Period12/7/812/7/12

Keywords

  • Differential geometry
  • Dual-phase steel
  • Fully automated serial-sectioning microscope
  • Pearlite
  • Topology

ASJC Scopus subject areas

  • Mechanics of Materials

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