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Evidencing extrinsic stacking faults in twinning-induced plasticity steel

Journal Article


Abstract


  • In twinning induced plasticity (TWIP) steel, the question of what leads to the onset of twinning in grains whose (100) orientations are near parallel to the tensile axis at high tensile strains has not been resolved. Using aberration corrected scanning transmission microscopy we present first-hand evidence that extrinsic stacking faults serve as nuclei for twins in (100) grains and also contribute to twin growth in a low carbon TWIP steel uniaxially tensile loaded up to its ultimate tensile strength of ~ 1080 MPa; which corresponds to a tensile true strain of 48%. The results corroborate and validate our previous Schmid factor¿based predictions on the feasibility of twinning nucleation via extrinsic stacking faults in (100) grains at high tensile strains.

Publication Date


  • 2017

Citation


  • Casillas, G., Gazder, A. A., Pereloma, E. V. & Saleh, A. A. (2017). Evidencing extrinsic stacking faults in twinning-induced plasticity steel. Materials Characterization, 123 275-281.

Scopus Eid


  • 2-s2.0-85002369833

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2330

Number Of Pages


  • 6

Start Page


  • 275

End Page


  • 281

Volume


  • 123

Abstract


  • In twinning induced plasticity (TWIP) steel, the question of what leads to the onset of twinning in grains whose (100) orientations are near parallel to the tensile axis at high tensile strains has not been resolved. Using aberration corrected scanning transmission microscopy we present first-hand evidence that extrinsic stacking faults serve as nuclei for twins in (100) grains and also contribute to twin growth in a low carbon TWIP steel uniaxially tensile loaded up to its ultimate tensile strength of ~ 1080 MPa; which corresponds to a tensile true strain of 48%. The results corroborate and validate our previous Schmid factor¿based predictions on the feasibility of twinning nucleation via extrinsic stacking faults in (100) grains at high tensile strains.

Publication Date


  • 2017

Citation


  • Casillas, G., Gazder, A. A., Pereloma, E. V. & Saleh, A. A. (2017). Evidencing extrinsic stacking faults in twinning-induced plasticity steel. Materials Characterization, 123 275-281.

Scopus Eid


  • 2-s2.0-85002369833

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2330

Number Of Pages


  • 6

Start Page


  • 275

End Page


  • 281

Volume


  • 123