Ab initio insights into compositional dependence of TWIP and TRIP barriers of Ti-alloys

Description

Advanced manufacturing, such as additive manufacturing, is a promising concept for a more material-efficient production route of components with complex shapes. However, this new technology also brings new challenges such as different microstructures and compositions. In this contribution, we will present a fundamental study on the impact of alloying species on transformation barriers in Ti-alloys. We employ ab initio methods to calculate the potential energy surface (PES) for a bcc-to-hcp transformation as a model for transformation-induced plasticity (TRIP), as well as stacking fault energies together with their barriers for different twinning mechanisms as a measure of the twinning-induced plasticity (TWIP). We present strategies for evaluating the alloying impact on those measures using a thermodynamics-based statistical averaging of various local configurations.

Period	17 Mar 2024 → 22 Mar 2024
Event title	DPG Spring Meeting
Event type	Conference
Location	BerlinShow on map