scholarly journals Atomic scale characterization of three-dimensional structure, magnetic properties and dynamic evolutions of materials by transmission electron microscopy

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
◽  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Magnetic Properties ◽  
Three Dimensional ◽  
Atomic Scale ◽  
Dimensional Structure ◽  
Three Dimensional Structure ◽  
Transmission Electron ◽  
Scale Characterization

scholarly journals Atomic-Scale Characterization of Metals and Alloys Using Spherical-Aberration Corrected Scanning Transmission Electron Microscopy

2006 ◽  
Vol 12 (S02) ◽  
pp. 1344-1345
Author(s):  
D Williams ◽  
M Watanabe
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Scanning Transmission Electron Microscopy ◽  
Spherical Aberration ◽  
Atomic Scale ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Scale Characterization ◽  
Aberration Corrected

Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2006

scholarly journals Micro and Nanoscale Characterization of Complex Multilayer-Structured White Etching Layer in Rails

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 749 ◽  
Author(s):  
Jun Wu ◽  
Roumen Petrov ◽  
Sebastian Kölling ◽  
Paul Koenraad ◽  
Loic Malet ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Rail Steel ◽  
Electron Backscatter Diffraction ◽  
Thickness Distribution ◽  
Atom Probe ◽  
Transmission Electron ◽  
Nanoscale Characterization ◽  
Scale Characterization

Micro- to nano-scale characterization of the microstructures in the white etching layer (WEL), observed in a Dutch R260 Mn grade rail steel, was performed via various techniques. Retained austenite in the WEL was identified via electron backscatter diffraction (EBSD), automatic crystallographic orientation mapping in transmission electron microscopy (ACOM-TEM), and X-ray diffraction (XRD). EBSD and ACOM-TEM methods were used to quantify grains (size range: 50 nm–4 μm) in the WEL. Transmission electron microscopy (TEM) was used to identify complex heterogeneous microstructural morphologies in the WEL: Nano-twinning substructure with high dislocation density in the WEL close to the rail surface and untransformed cementite and dislocations in the WEL close to the pearlite matrix. Furthermore, atom probe tomography (APT) revealed a heterogeneous through-thickness distribution of alloying elements in the WEL. Accordingly, the WEL is considered a multi-layered martensitic microstructure. These findings are supported by the temperature calculations from the shape analysis of the manganese profile from APT measurements, related to manganese diffusion. The deformation characteristics of the WEL and the pearlite beneath the WEL are discussed based on the EBSD measurements. The role of deformation in the martensitic phase transformation for WEL formation is discussed.

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