TEM & EBSD Study on Deformation Behavior of High Nitrogen Austenitic Fe-18Cr-18Mn-2Mo-0.9N Stainless Steel

Tae Ho Lee; Sung Joon Kim; Suk Hoon Kang; Kyu Hwan Oh; Setsuo Takaki

doi:10.4028/www.scientific.net/SSP.124-126.1333

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TEM & EBSD Study on Deformation Behavior of High Nitrogen Austenitic Fe-18Cr-18Mn-2Mo-0.9N Stainless Steel
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HomeSolid State PhenomenaSolid State Phenomena Vols. 124-126TEM & EBSD Study on Deformation Behavior of High...

TEM & EBSD Study on Deformation Behavior of High Nitrogen Austenitic Fe-18Cr-18Mn-2Mo-0.9N Stainless Steel

Abstract:

Deformation behavior of high nitrogen austenitic Fe-18Cr-18Mn-2Mo-0.9N stainless steel was investigated utilizing electron back-scattered diffraction (EBSD) and transmission electron microscopy (TEM). During deformation, the <110> grains rotated and the trace of these grains moved towards into the dodecahedral plane (the line connecting (001) and (111) planes). Misorientation mapping in EBSD showed that the special boundaries (almost Σ3) gradually diminished whereas the low-angle boundaries were developed. TEM observation showed that (i) the low-angle boundaries developed corresponded to the deformation twinning with {111}<112> component, (ii) the deformation twinning showed the strong orientation dependence relative to tensile axis, and (iii) the deformed microstructure was characterized by extended stacking faults, planar dislocation array in low strain regime, and by well-developed deformation twinning in high strain region, respectively.

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Periodical:

Solid State Phenomena (Volumes 124-126)

Pages:

1333-1336

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.124-126.1333

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Online since:

June 2007

Authors:

Tae Ho Lee, Sung Joon Kim, Suk Hoon Kang, Kyu Hwan Oh, Setsuo Takaki

Keywords:

Twinning, Deformation, Electron Backscatter Diffraction (EBSD), High Nitrogen Steel (HNS), TEM

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