Modeling of martensitic phase transformation accounting for inertia effects

• Published in: International journal of mechanical sciences 2024-09, Vol.278, p.109443, Article 109443
• Main Authors: Liu, Xiaoying, Schneider, Daniel, Reder, Martin, Hoffrogge, Paul W., Nestler, Britta
• Format: Article
• Language: English
• Subjects: Dynamic mechanics; Inertia effects; Martensitic phase transformation; Multiphase-field modeling; Phase transformation velocity; Transformation strain
• ISSN: 0020-7403; 1879-2162
• DOI: 10.1016/j.ijmecsci.2024.109443

As a diffusionless phase transformation, martensite evolves at the speed close to sound, with its kinetics and morphology dominated by the mechanical energy. However, the mechanism of martensitic phase transformation with the consideration of inertia is rarely investigated. This paper presents a multiphase-field model, where the transformation strain in martensite performs as the mechanical wave source, and in return the kinetic energy contributes to the driving force for phase transformation. As a result, the mechanical fields, i.e., the stress and the velocity, are derived according to the increment of the transformation strain. The propagation direction of the mechanical wave is corrected by considering the growth of the martensitic nucleus. With the 1D and 2D analysis, as well as the comparison against 2D static case, the mechanism of martensitic phase transformation is investigated, and the advantage of mechanical model accounting for inertia effects is illustrated. [Display omitted] •A multiphase-field model including dynamic mechanics is proposed.•The transformation strain in martensite acts as a mechanical wave source.•The kinetic energy contributes to the driving force.•The mechanism of martensitic phase transformation is investigated in 1D and 2D cases.•The multiphase-field model with dynamic mechanics is more accurate than static.