On the strain hardening and texture evolution in high manganese steels: Experiments and numerical investigation
Abstract
We present a systematic investigation on the strain hardening and texture evolution in high manganese steels where twinning induced plasticity (TWIP) plays a significant role for the materials' plastic deformation. Motivated by the stress-strain behavior of typical TWIP steels with compositions of Fe, Mn, and C, we develop a mechanistic model to explain the strain-hardening in crystals where deformation twinning dominates the plastic deformation. The classical single crystal plasticity model accounting for both dislocation slip and deformation twinning are then employed to simulate the plastic deformation in polycrystalline TWIP steels. While only deformation twinning is activated for plasticity, the simulations with samples composed of voronoi grains cannot fully capture the texture evolution of the TWIP steel. By including both twinning deformation and dislocation slip, the model is able to capture both the stress-strain behaviors and the texture evolution in Fe-Mn-C TWIP steel in different boundary-value problems. Further analysis on the strain contributions by both mechanisms suggests that deformation twinning plays the dominant role at the initial stage of plasticity in TWIP steels, and dislocation slip becomes increasingly important at large strains- 期刊论文
- Twinning Induced Plasticity
- Deformation Twinning
- Strain Hardening
- Crystal Plasticity
- Finite-element Analysis
- 固体力学
- 一类
- strain hardening
- finite element method
- 应变强化
- hardening, strain
- work hardening
- strain-hardening
- 应变硬化
- strain hardening mechanisms
- mecanismes d ecrouissage
- verformungshaertung
- work hardening mechanisms
- strain hardening parameters
- parametres d ecrouissage
- verformungshaertungsparameter
- work hardening parameters
- 功致硬化
- work strengthening
- 有限元分析
- 有限元法
- finite element analysis
- fem (numerical analysis)
- fea (numerical analysis)
- fea
- finite volume methods
- mesh generation
- delaunay triangulation
- 网格生成
- 有限[单]元法
- hybrid-trefftz finite element method
- trefftz method
- finite-element analysis
- fem
- free electron model