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Efficient Crystal Plasticity Modeling of Lath Martensite Considering Block Boundary Effects

Issa, Sally LU ; Hallberg, Håkan LU orcid ; Wallin, Mathias LU and Ristinmaa, Matti LU orcid (2025) In Metals 15(4).
Abstract

An efficient extension of conventional rate-dependent crystal plasticity is formulated to include the influence of block boundaries in lath martensite. It is shown that this can be achieved by minor modifications to a conventional crystal plasticity model, providing an efficient modeling approach with a negligible additional computational cost. With this modification, the parameter related to lattice friction is made dependent on a Hall–Petch-type block size dependency, resulting in block strengthening. The boundaries are modeled as obstacles which restrict the motion of dislocations, resulting in lower slip activity and promoting dislocation accumulation close to the boundaries. The model is calibrated and validated using experimental... (More)

An efficient extension of conventional rate-dependent crystal plasticity is formulated to include the influence of block boundaries in lath martensite. It is shown that this can be achieved by minor modifications to a conventional crystal plasticity model, providing an efficient modeling approach with a negligible additional computational cost. With this modification, the parameter related to lattice friction is made dependent on a Hall–Petch-type block size dependency, resulting in block strengthening. The boundaries are modeled as obstacles which restrict the motion of dislocations, resulting in lower slip activity and promoting dislocation accumulation close to the boundaries. The model is calibrated and validated using experimental data from the literature, and its capabilities are demonstrated in a series of simulation examples.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
block size strengthening, crystal plasticity, lath martensite
in
Metals
volume
15
issue
4
article number
435
pages
17 pages
publisher
MDPI AG
external identifiers
  • scopus:105003568371
ISSN
2075-4701
DOI
10.3390/met15040435
project
eSSENCE@LU 10:1 - High-resolution computational modelling of domain formation in metal halide perovskite nanocomponents: Targeting next-generation solar energy technology
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2025 by the authors.
id
88068958-8d6b-4e1c-914a-517c57c5a695
date added to LUP
2025-05-08 09:29:28
date last changed
2025-05-19 11:52:34
@article{88068958-8d6b-4e1c-914a-517c57c5a695,
  abstract     = {{<p>An efficient extension of conventional rate-dependent crystal plasticity is formulated to include the influence of block boundaries in lath martensite. It is shown that this can be achieved by minor modifications to a conventional crystal plasticity model, providing an efficient modeling approach with a negligible additional computational cost. With this modification, the parameter related to lattice friction is made dependent on a Hall–Petch-type block size dependency, resulting in block strengthening. The boundaries are modeled as obstacles which restrict the motion of dislocations, resulting in lower slip activity and promoting dislocation accumulation close to the boundaries. The model is calibrated and validated using experimental data from the literature, and its capabilities are demonstrated in a series of simulation examples.</p>}},
  author       = {{Issa, Sally and Hallberg, Håkan and Wallin, Mathias and Ristinmaa, Matti}},
  issn         = {{2075-4701}},
  keywords     = {{block size strengthening; crystal plasticity; lath martensite}},
  language     = {{eng}},
  number       = {{4}},
  publisher    = {{MDPI AG}},
  series       = {{Metals}},
  title        = {{Efficient Crystal Plasticity Modeling of Lath Martensite Considering Block Boundary Effects}},
  url          = {{http://dx.doi.org/10.3390/met15040435}},
  doi          = {{10.3390/met15040435}},
  volume       = {{15}},
  year         = {{2025}},
}