Simulative predictions of microstructure evolution provide a resource-efficient option for development and optimization in the field of material science. In this context, it is of key importance that models underlying the numerical simulations capture all relevant physical effects to enable a quantitative representation of microstructure evolution. The multiphase-field method (MPFM) is a well-established tool for modelling and simulation of microstructure evolution for problems involving multiple different phases [1]. The MPFM provides a numerically efficient parametrisation of the domains occupied by the evolving phases and the corresponding moving interfaces in-between and is widely used for applications like grain growth or solidification. For phase transformations involving plastification, like martensitic phase transformation, the thermomechanical coupling is commonly neglected. However, in case of a non-vanishing coefficient of thermal expansion, even for small strains and strain rates, the consideration of coupling terms can change the prediction of growth rates [2]. Both the plastic stress power and thermomechanical coupling terms are considered acting as heat sources or sinks. Furthermore, the release of latent heat is of relevance in many phase-transformation processes. The presented contribution focuses on the role of latent heat supplementing the framework of [2] with regards to displacive phase-transformations. Thereby, the growth of an elastoplastic inclusion, embedded in an elastoplastic matrix under different loading conditions is discussed. REFERENCES [1] B. Nestler and H. Garcke and B. Stinner. Physical Review E, Vol. 71, No. 4, pp. 041609 1–6, 2005 [2] A. Prahs, M. Reder, D. Schneider, B. Nestler, Int. J. Mech. Sci., Vol 257, 108484, 2023