Cristin-resultat-ID: 1110803
Sist endret: 13. februar 2014, 13:18
NVI-rapporteringsår: 2013
Resultat
Vitenskapelig artikkel
2013

Application of combined EBSD and 3D-SEM technique on crystallographic facet analysis of steel at low temperature

Bidragsytere:
  • Peyman Mohseni
  • Jan Ketil Solberg
  • Morten Karlsen
  • Odd Magne Akselsen og
  • Erling Østby

Tidsskrift

Journal of Microscopy
ISSN 0022-2720
e-ISSN 1365-2818
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2013
Volum: 251
Hefte: 1
Sider: 45 - 56

Importkilder

Isi-ID: 000320170900007
Scopus-ID: 2-s2.0-84878972585

Beskrivelse Beskrivelse

Tittel

Application of combined EBSD and 3D-SEM technique on crystallographic facet analysis of steel at low temperature

Sammendrag

Electron backscatter diffraction has been increasingly used to identify the crystallographic planes and orientation of cleavage facets with respect to the rolling direction in fracture surfaces. The crystallographic indices of cleavage planes can be determined either directly from the fracture surface or indirectly from metallographic sections perpendicular to the plane of the fracture surface. A combination of electron backscatter diffraction and 3D scanning electron microscopy imaging technique has been modified to determine crystallographic facet orientations. The main purpose of this work has been to identify the macroscopic crystallographic orientations of cleavage facets in the fracture surfaces of weld heat affected zones in a well-known steel fractured at low temperatures. The material used for the work was an American Petroleum Institute (API) X80 grade steel developed for applications at low temperatures, and typical heat affected zone microstructures were obtained by carrying out weld thermal simulation. The fracture toughness was measured at different temperatures (0°C, −30°C, −60°C and −90°C) by using Crack Tip Opening Displacement testing. Fracture surfaces and changes in microstructure were analyzed by scanning electron microscopy and light microscopy. Crystallographic orientations were identified by electron backscatter diffraction, indirectly from a polished section perpendicular to the major fracture surface of the samples. Computer assisted 3D imaging was used to measure the angles between the cleavage facets and the adjacent polished surface, and then these angles were combined with electron backscatter diffraction measurements to determine the macroscopic crystallographic planes of the facets. The crystallographic indices of the macroscopic cleavage facet planes were identified to be {100}, {110}, {211} and {310} at all temperatures.

Bidragsytere

Peyman Mohseni

  • Tilknyttet:
    Forfatter
    ved Institutt for materialteknologi ved Norges teknisk-naturvitenskapelige universitet

Jan Ketil Solberg

  • Tilknyttet:
    Forfatter
    ved Institutt for materialteknologi ved Norges teknisk-naturvitenskapelige universitet

Morten Karlsen

  • Tilknyttet:
    Forfatter
    ved Institutt for materialteknologi ved Norges teknisk-naturvitenskapelige universitet
  • Tilknyttet:
    Forfatter
    ved Equinor

Odd Magne Akselsen

  • Tilknyttet:
    Forfatter
    ved Institutt for maskinteknikk og produksjon ved Norges teknisk-naturvitenskapelige universitet
  • Tilknyttet:
    Forfatter
    ved Materialer og nanoteknologi ved SINTEF AS

Erling Østby

  • Tilknyttet:
    Forfatter
    ved Materialer og nanoteknologi ved SINTEF AS
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