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A Strategy for Phase Identification of Precipitates in High Al-containing Austenitic and Ferritic Steels Using Electron Diffraction
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  • Journal title : Applied Microscopy
  • Volume 44, Issue 4,  2014, pp.144-149
  • Publisher : Korean Society of Electron Microscopy
  • DOI : 10.9729/AM.2014.44.4.144
 Title & Authors
A Strategy for Phase Identification of Precipitates in High Al-containing Austenitic and Ferritic Steels Using Electron Diffraction
Heo, Yoon-Uk;
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A strategy for phase identification of precipitates in high Al-containing austenitic and ferritic steels using electron diffraction (ED) is studied. Comparative studies of the various Al-containing precipitates (k-carbide, , , FeAl) show the similarities of crystal structure and lattice parameter. However, the slight differences of lattice parameter and structure display characteristic ED patterns (EDPs) which can be identified. k-carbide and can be differentiated by the length of (the reciprocal lattice vector), even though they show perfectly identical shapes of EDPs. and FeAl show the characteristic EDs in [110] and [112] beam directions due to the differences of Fe site occupancies in unit cells. k-carbide, , and FeAl show also the similar EDs in [112], [112], and [110] beam directions, respectively. All the possible similarities of EDs among each phases and the strategy for phase identification are discussed on the bases of kinematical ED simulation.
Electron diffraction pattern;;;;k-carbide;
 Cited by
Frommeyer G, Drewes E J, and Engl B (2006) Physical and mechanical properties of iron-aluminium-(Mn, Si) lightweight steels. J. Phys. 10, 1245-1253.

Lin C L, Chao C G, Bor H Y, and Liu T F (2010) Relationship between microstructures and tensile properties of an Fe-30Mn-8.5Al-2.0C alloy. Mat. Trans. 51, 1084-1088. crossref(new window)

Palm M (2005) Concepts derived from phase diagram studies for the strengthening of Fe-Al-based alloys. Intermetallics 13, 1286-1295. crossref(new window)

Pollock T M and Tin S (2006) Nickel-based superalloys for advanced turbine engines: chemistry, microstructure, and properties. J. Pro. Pow. 22, 361-374. crossref(new window)

Seol J B, Raabe D. Choi P, Park H S, Kwak J H, and Park C G (2013) Direct evidence for the formation of ordered carbides in a ferrite-based lowdensity Fe-Mn-Al-C alloy studied by transmission electron microscopy and atom probe tomography. Scripta Mater. 68, 348-353. crossref(new window)

Sourmail T (2001) Precipitation in creep resistant austenitic stainless steels. Mater. Sci. Tech. 17, 1-14. crossref(new window)

Yamamoto Y, Brady M P, Lu Z P, Liu C T, Takeyama M, Maziasz P J, and Pint B A (2007) Alumina-forming austenitic stainless steels strengthened by laves phase and MC carbide precipitates. Met. Mat. Trans. A 38, 2737-2746. crossref(new window)