The martensite-to-austenite reversion mechanisms under continuous heating and annealing of metastable austenitic stainless steel subjected to cold swaging were studied. reversion-temperature-time diagram was constructed using high-resolution dilatometry. revealed a sequence martensitic diffusional recrystallization. Martensitic might be separated by the rate >10 °C/s. started via mechanism, ...

In this work, austenite–martensite transformation in a low alloy steel is modeled using Voronoi algorithm. The evolved fraction of martensite predicted from the geometry diagram constructed, incorporating nucleation kinetics and obtained results are validated against Koistinen–Marburger equation. geometrical properties phase identified characteristics Poisson–Voronoi diagram. Finally, microstru...

In this paper, how magnetic hysteresis loop and magnetic Barkhausen noise (MBN) measurements can provide non destructive information about the evolution of the microstructure during the annealing of cold rolled low carbon steel sheets is shown. The effect of recovery and recrystallization processes on hysteresis loop and MBN signal measurements is analysed and related to the microstructural cha...

Predicting microstructure and (micro-)texture evolution during thermo-mechanical processing requires the combined simulation of plastic deformation recrystallization. Here, a approach based on coupling full-field dislocation density crystal plasticity model cellular automaton is presented. A regridding/remeshing procedure used to transfer data between deformed mesh large-strain regular grid aut...

A constitutive model to describe macroscopic elastic and transformation behaviors of polycrystalline shape-memory alloys is formulated using an internal variable thermodynamic framework. In a departure from prior phenomenological models, the proposed model treats initiation, growth kinetics, and saturation of transformation distinctly, consistent with physics revealed by recent multi-scale expe...

Partially recrystallized samples of 5352 aluminum alloy and pure titanium were sectioned and characterized with automated electron backscatter diffraction (EBSD) in a scanning electron microscope. Pixels were partitioned into recrystallized (annealed state) and unrecrystallized (deformed state) using a criterion based on the confidence index (CI) and the diffraction pattern quality (IQ). Unrecr...

The development of the quenching and partitioning (Q&P) process has prompted an interest in isothermal transformation presence a pre-existing phase such as martensite. prior martensite is known to accelerate overall kinetics bainite formation, both 1-step 2-step Q&P process. underlying mechanisms behind this phenomenon are not fully understood. Also, nature product (isothermal and/or bainite) f...

The formation of a recrystallization texture is closely related to the nucleation and growth of recrystallizing grains, which may vary from grain to grain. Cube texture is a commonly observed recrystallization texture in face centered cubic metals of medium to high stacking fault energy after heavy cold-rolling and annealing. In this work, recrystallization of pure copper cold-rolled to a von M...