Abstract
A systematic study of polycrystalline flow during in situ tension testing of 430 stainless steel was done at 25 °C using a tensile module coupled in a field emission scanning electron microscope at three different crosshead velocities. By mapping the polycrystalline flow it was found that the trajectory of the crystals during an irreversible deformation process followed by a hyperbolic motion. Such behavior is related to the microstructural evolution during tensile testing, as was observed, the polycrystalline irreversible deformations are promoted by coupled mechanisms: dislocation dynamics at inner individual crystals and granular group movement, named cellular dislocations. There are some important differences in the microstructure evolution and ductility related to the effect of the crosshead velocity. In connection, with the ductile behavior of SEPCS, the fractography study exhibited a notable change in the density and diameter of microvoids, which were changed from large to small in size as a crosshead velocity increased.
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Acknowledgments
The authors thank Laboratorio de Microscopia Electrónica de la DCBI UAM Azcapotzalco unit, for the use of their installations and the use of the special tension module coupled with the FESEM. EGG, MAS, and BVA gratefully acknowledge the SNI for the distinction of their membership and the stipend received.
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Garfias-García, E., Muñoz-Andrade, J.D., Rodríguez-López, P.G., Aguilar-Sánchez, M., Vargas-Arista, B. (2015). On the Effect of Crosshead Velocity on Polycrystalline Flow During Tension Testing of a 430 Stainless Steel. In: Pérez Campos, R., Contreras Cuevas, A., Esparza Muñoz, R. (eds) Materials Characterization. Springer, Cham. https://doi.org/10.1007/978-3-319-15204-2_13
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DOI: https://doi.org/10.1007/978-3-319-15204-2_13
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-15203-5
Online ISBN: 978-3-319-15204-2
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