@phdthesis{f1b54112-2f16-4944-b927-fe4ef0e593db,
  abstract     = {{This thesis investigates the martensitic phase transformation with the aim of developing predictive models for its formation and evolution under different conditions. The work seeks to provide a fundamental understanding of martensitic transformation through both macroscale continuum modeling and mesoscale crystal plasticity modeling. <br/><br/><br/> The continuum modeling considers the austenite to martensite phase transformation coupled to large strain plasticity and is formulated to capture the rate dependence of plastic deformation during laser shock peening. The model is used to identify the relative influence of process parameters on the formation of martensite and plastic deformation and is further applied to study the influence of martensitic transformation on crack propagation. It is shown that, under certain conditions, the martensitic phase transformation can retard crack propagation.  <br/> <br/> <br/> <br/>The crystal plasticity model, on the other hand, is employed to investigate lath martensite and the effect of block boundaries on the macroscopic strength of the material. Block boundaries are shown to act as obstacles to dislocation motion, which contributes to the strengthening mechanism. In addition, a numerical study of the crystal plasticity formulation is conducted, in which a diagonally implicit Runge-Kutta method is evaluated as a solution scheme.<br/> <br/><br/>The proposed modeling framework and numerical methods contribute to an improved understanding of martensitic transformation and support the design of metallic materials with enhanced performance for advanced engineering applications.}},
  author       = {{Issa, Sally}},
  isbn         = {{978-91-90202-68-5}},
  keywords     = {{constitutive modeling; Martensitic phase transformations}},
  language     = {{eng}},
  publisher    = {{Solid Mechanics, Faculty of Engineering, Lund University}},
  school       = {{Lund University}},
  title        = {{Modeling of martensitic phase transformation. Numerics, microstructure and applications.}},
  url          = {{https://lup.lub.lu.se/search/files/257929128/Sally_Issa_-_WEBB.pdf}},
  year         = {{2026}},
}