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- W2938426972 abstract "Quenching and tempering are mostly employed to tune the mechanical properties of the high-carbon steels. In the present study, transmission electron microscopy (TEM) and selected area electron diffraction (SAED) are used to examine the microstructural evolution in quenched and tempered high carbon steels. In quenched specimens, the ω-Fe(C) phase is a common substructure in twinned martensite and its diffraction spots are located at 1/3 and 2/3 (21¯1)α-Fe positions along the [011]α-Fe zone axis (ZA). When specimens are in-situ heated in TEM, few additional diffraction spots are observed at 1/6, 3/6 and 5/6 (21¯1)α-Fe positions along the [011]α-Fe ZA. Moreover, martensite decomposes into a lamellar structure and ω-Fe(C) phase transforms into θ-Fe3C cementite during tempering. The TEM and electron diffraction analysis reveals that diffraction spots of θ-Fe3C cementite phase are located at 1/6, 2/6, 3/6, 4/6 and 5/6 (222¯)α-Fe and (21¯1)α-Fe along [112]α-Fe and [011]α-Fe ZAs. Furthermore, the orientation relationships between θ-Fe3C cementite and α-Fe are indexed as: [013]θ//[112]α-Fe, [001]θ//[011]α-Fe, [1¯13]θ//[111]α-Fe and [1¯02]θ//[131]α-Fe, which are related to the transformation of ω-Fe to θ-Fe3C cementite. The current study provides a baseline to understand the microstructural evolution in high carbon steels during heat treatment processes." @default.
- W2938426972 created "2019-04-25" @default.
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- W2938426972 date "2019-04-01" @default.
- W2938426972 modified "2023-10-16" @default.
- W2938426972 title "TEM and electron diffraction analysis of ω-Fe to cementite transformation in quenched and tempered high carbon steels" @default.
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- W2938426972 doi "https://doi.org/10.1063/1.5091847" @default.
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