Paper Title:
FIB and TEM Studies on the Bainitic Microstructure in Low Carbon HSLA Steels
  Abstract

In the present study, focused ion beam (FIB) technique was applied to make site-specific TEM specimens and to identify the 3-dimensional grain morphologies of bainitic microstructure in low carbon HSLA steels such as granular bainite, acicular ferrite and bainitic ferrite. Granular bainite consisted of fine subgrains and 2nd phase constituents like M/A or pearlite located at grain and subgrain boundaries. Acicular ferrite was characterized by an aggregate of ramdomly orientated and irregular shaped grains. The high angle boundaries between adjacent acicular ferrite grains caused by intragranular nucleation during continuous cooling process. Bainitic ferrite revealed uniform and parallel lath structure within the prior austenite grain boundaries and its’ packet size could effectively decreased by the formation of intragranular acicular ferrite.

  Info
Periodical
Advanced Materials Research (Volumes 26-28)
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
73-76
DOI
10.4028/www.scientific.net/AMR.26-28.73
Citation
J.S. Kang, S.S. Ahn, C.Y. Yoo, C. G. Park, "FIB and TEM Studies on the Bainitic Microstructure in Low Carbon HSLA Steels", Advanced Materials Research, Vols. 26-28, pp. 73-76, 2007
Online since
October 2007
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$32.00
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