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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, Ni3Al, Fe3Al, 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. L12 k-carbide and Ni3Al can be differentiated by the length of g (the reciprocal lattice vector), even though they show perfectly identical shapes of EDPs. DO3 Fe3Al and B2 FeAl show the characteristic EDs in [110] and [112] beam directions due to the differences of Fe site occupancies in unit cells. k-carbide, Ni3Al, 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 identiἀcation are discussed on the bases of kinematical ED simulation.
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참고문헌 (7)
참고문헌 신청
Frommeyer G / 2006 / Physical and mechanical properties of iron-aluminium-(Mn, Si) lightweight steels / J. Phys 10 : 1245 ~ 1253
Lin C L / 2010 / Relationship between microstructures and tensile properties of an Fe-30Mn-8.5Al-2.0C alloy / Mat. Trans 51 : 1084 ~ 1088
Palm M / 2005 / Concepts derived from phase diagram studies for the strengthening of Fe-Al-based alloys / Intermetallics 13 : 1286 ~ 1295
Pollock T M / 2006 / Nickel-based superalloys for advanced turbine engines: chemistry, microstructure, and properties / J. Pro. Pow 22 : 361 ~ 374
Seol J B / 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 pr
Lin C L / 2010 / Relationship between microstructures and tensile properties of an Fe-30Mn-8.5Al-2.0C alloy / Mat. Trans 51 : 1084 ~ 1088
Palm M / 2005 / Concepts derived from phase diagram studies for the strengthening of Fe-Al-based alloys / Intermetallics 13 : 1286 ~ 1295
Pollock T M / 2006 / Nickel-based superalloys for advanced turbine engines: chemistry, microstructure, and properties / J. Pro. Pow 22 : 361 ~ 374
Seol J B / 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 pr
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