Modeling structure formation in TRIP steel during multiple wire drawing

The article presents the results of a study of the structure formation of steel with a TRIP effect during multiple wire drawing processes using multiscale finite element modeling. Using a set of computer models, the transformation of retained austenite in the wire microstructure into martensite is studied depending on the stress-strain state parameters in the deformation zone for various configurations of the distribution of single reductions, the die reduction angle, and the strain rate. The possibility of flexible control of wire structure formation by varying the deformation process parameters is demonstrated. It is established that, to maximize the retention of retained austenite in the steel microstructure, which enables the achievement of new performance characteristics in the finished wire, drawing should be performed using routes with a linear or combined distribution of single reductions at reduced rates and small drawing tool angles. Drawing at higher rates, using the highest possible die angles and increased single reductions, allows for the complete conversion of ductile retained austenite in the steel microstructure into stronger martensite, ensuring the achievement of higher strength properties in wire compared to conventional and currently widely used medium- and low-carbon steels.This research was supported by a grant from the Russian Science Foundation (agreement no. 25-29-20042 dated May 14, 2025, https://rscf.ru/project/25-29-20042/) and financial support from the Government of the Chelyabinsk Region (agreement no. 30-2025-002767 dated July 7, 2025).