Journal Article

FZJ-2023-03048

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Statistical analysis of discrete dislocation dynamics simulations: initial structures, cross-slip and microstructure evolution

Demirci, A.FZJ* ; Steinberger, D. ; Stricker, M. ; Merkert, N. ; Weygand, D. ; Sandfeld, S. (Corresponding author)FZJ*

2023
IOP Publ. Bristol

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Please use a persistent id in citations: doi:10.1088/1361-651X/acea39  doi:10.34734/FZJ-2023-03048

Abstract: Over the past decades, discrete dislocation dynamics simulations have been shown to reliably predict the evolution of dislocation microstructures for micrometer-sized metallic samples. Such simulations provide insight into the governing deformation mechanisms and the interplay between different physical phenomena such as dislocation reactions or cross-slip. This work is focused on a detailed analysis of the influence of the cross-slip on the evolution of dislocation systems. A tailored data mining strategy using the 'discrete-to-continuous (D2C) framework' allows to quantify differences and to quantitatively compare dislocation structures. We analyze the quantitative effects of the cross-slip on the microstructure in the course of a tensile test and a subsequent relaxation to present the role of cross-slip in the microstructure evolution. The precision of the extracted quantitative information using D2C strongly depends on the resolution of the domain averaging. We also analyze how the resolution of the averaging influences the distribution of total dislocation density and curvature fields of the specimen. Our analyzes are important approaches for interpreting the resulting structures calculated by dislocation dynamics simulations.

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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)

Appears in the scientific report 2023

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; National-Konsortium ; SCOPUS ; Web of Science Core Collection

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