Transmission Electron Microscopy Characterization and High-Resolution Modeling of Second-Phase Particles of V- and Ti-Containing Twinning-Induced Plasticity Steel under Uniaxial Hot-Tensile Condition
Por:
Salas-Reyes A.E., Mejia, Ignacio, Ruiz-Baltazar, Alvaro, Cabrera J.M.
Publicada:
1 ene 2019
Resumen:
Composition and crystallographic nature of precipitates in microalloyed advanced high-strength steels (AHSS) greatly influence their microstructure and mechanical behavior. Second-phase precipitation in a high-Mn twinning-induced plasticity (TWIP) steel single microalloyed with V and Ti under uniaxial hot-tensile condition is experimentally and theoretically studied using high-resolution this purpose, carbon extraction replica technique, image treatment, and computer simulation are used to determine the crystallographic features of particles and compared with experimental measurements. Results show particle morphologies depending on crystallographic orientation, namely, hexagonal-type for TWIP-V steel and rectangular-type for TWIP-Ti steel. Measurements on particle size range from 10 to 190 nm in both steels. HRTEM digital image processing allows correcting the obtained Fast Fourier Transform (FFT) diffraction patterns, where interplanar distance measurements indicate the presence of VC and TiC compounds. In the case of the modeled particles, it is possible to identify the NaCl-type crystal structure, which are correctly relate with experimental morphologies. Finally, theoretical simulations based on the multislice approach of the dynamical theory of electron diffraction allow modeling HRTEM images. Thus, results indicate that current characterization and simulation procedure are helpful in recognizing crystallographic nature of precipitates formed in the studied TWIP steels. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Filiaciones:
Salas-Reyes A.E.:
Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Edificio “U-3”, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico
Departamento de Ingeniería Metalúrgica, Facultad de Química, UNAM, Ciudad Universitaria, Ciudad de México, 04510, Mexico
Mejia, Ignacio:
Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Edificio “U-3”, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico
Univ Michoacana, Inst Invest Met & Mat, Edificio U-3,Ciudad Univ, Morelia 58030, Michoacan, Mexico
Ruiz-Baltazar, Alvaro:
Departamento de Nanotecnología-CONACYT - Centro de Física Aplicada y Tecnología Avanzada, UNAM, Boulevard Juriquilla 3001, Santiago de Querétaro, Qro. 76230, Mexico
UNAM, Dept Nanotecnol, CONACYT, Ctr Fis Aplicada & Tecnol Avanzada, Blvd Juriquilla 3001, Santiago De Queretaro 76230, Qro, Mexico
Cabrera J.M.:
Departament de Ciència dels Materials i Enginyeria Metal lúrgica, EEBE–Universitat Politècnica de Catalunya, c/ Eduard Maristany 10-14, Barcelona, 08019, Spain
UNAM, Dept Ingn Met, Fac Quim, Ciudad Univ, Ciudad De Mexico 04510, Mexico
Univ Politecn Cataluna, Dept Ciencia Mat & Engn Met, EEBE, C Eduard Maristany 10-14, Barcelona 08019, Spain
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