Contribution to a book

FZJ-2023-00984

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Properties of Phase Microstructures and Their Interaction with Dislocations in the Context of TRIP Steel Systems

Biermann, H. (Editor) ; Aneziris, C. G. (Editor) ; Strobl, R.FZJ* ; Budnitzki, M.FZJ* ; Sandfeld, S. (Corresponding author)FZJ*

2020
Springer International Publishing Cham
ISBN: 78-3-030-42603-3, 978-3-030-42603-3 (electronic)

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Please use a persistent id in citations: doi:10.1007/978-3-030-42603-3_23

Abstract: Transformation Induced Plasticity (TRIP) steels undergo a diffusionless phase transformation from austenite to martensite, resulting in a material exhibiting desireable material properties such as exceptional balance of strength and ductility as well as good fatigue behavior. Computational modeling at the mesoscale is potentially a suitable tool for studying how plastic deformation interacts with phase transformations and ultimately affects the bulk properties of these steels. We introduce models that represent the phase microstructure in a continuum approach and couple a time-dependent Ginzburg-Landau equation with discrete dislocation via their elastic strain energy densities. With this, the influence of several dislocation configurations are examined, namely a single dislocation, a “penny-shaped crack”, and a “dislocation cascade”. It is shown that the strain due to the presence of dislocations has a significant influence on the resultant martensitic microstructure. Furthermore, the importance of using a non-local elasticity approach for the dislocation stress fields is demonstrated.

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Contributing Institute(s):

1. Materials Data Science and Informatics (IAS-9)

Research Program(s):

1. 5111 - Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)

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