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HomeKey Engineering MaterialsKey Engineering Materials Vol. 664Simulation of the Interaction of Plastic...

Simulation of the Interaction of Plastic Deformation in Shear Bands with Deformation-Induced Martensitic Phase Transformation in the VHCF Regime

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Abstract:

The experimental observation of the microstructural deformation behavior of a metastable austenitic stainless steel tested at the real VHCF limit indicates that plastic deformation is localized and accumulated in shear bands and martensite formation occurs at grain boundaries and intersecting shear bands. Based on these observations a microstructure-sensitive model is proposed that accounts for the accumulation of plastic deformation in shear bands (allowing irreversible plastic sliding deformation) and considers nucleation and growth of deformation-induced martensite at intersecting shear bands. The model is numerically solved using the two-dimensional (2-D) boundary element method. By using this method, real simulated 2-D microstructures can be reproduced and the microstructural deformation behavior can be investigated within the microstructural morphology. Results show that simulation of shear band evolution is in good agreement with experimental observations and that prediction of sites of deformation-induced martensite formation is possible in many cases. The analysis of simulated shear stresses in most critical slip systems under the influence of plastic deformation due to microstructural changes contributes to a better understanding of the interaction of plastic deformation in shear bands with deformation-induced martensitic phase transformation in the VHCF regime.

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Advances in Very High Cycle Fatigue

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Periodical:

Key Engineering Materials (Volume 664)

Pages:

314-325

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.664.314

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Online since:

September 2015

Authors:

Philipp Malte Hilgendorff*, Andrei Grigorescu, Martina Zimmermann, Claus Peter Fritzen, Hans Jürgen Christ

Keywords:

Boundary Element Method, Martensitic Phase Transformation, Metastable Austenitic Stainless Steel, Shear Bands, VHCF

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* - Corresponding Author

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