About Deformation energy storage and grain refinement
A coupled Eulerian-Lagrangian (CEL) finite element model embedded with the dislocation density subroutine is developed to model the severe plastic deformation and grain refinement during a steady .
A coupled Eulerian-Lagrangian (CEL) finite element model embedded with the dislocation density subroutine is developed to model the severe plastic deformation and grain refinement during a steady .
Electron backscatter diffraction was used to study the microstructure and texture evolution during the deformation process. The results showed that the necklace structure is eventually formed by increasing compression strain due to dynamic recrystallization (DRX). The proportion of low-angle grain.
The multi-pass hot compression experiment method was used to study the hot deformation behavior and recrystallization evolution of electro-slag-remelted (ESR) Mn18Cr18N steel deformed to the strain of 0.69 at the temperatures of 1373 K and 1473 K with a strain rate of 1 s −1 and the interval.
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6 FAQs about [Deformation energy storage and grain refinement]
Do precipitates progress grain refinement during deformation?
Precipitates will progress grain refinement during deformation, there is a mass of nanoscale grains around the precipitates. The mechanical behaviors and deformation mechanisms of Chinese low activation martensitic (CLAM) steel under extreme loading conditions were systematically studied.
What are the critical conditions for grain refinement?
The critical conditions for recrystallisation were identified as σ c / σ P = 0.98. Combined with microstructural observations, it was determined that grain refinement primarily occurred through the dynamic recrystallisation mechanism and the deformation induced ferrite transformation mechanism.
Can grain refinement improve the ability to store energy during plastic deformation?
Rittel et al. stated that DRX results from the finite capacity of a material to store dynamic plastic deformation energy. In other words, grain refinement can improve the ability to store energy during plastic deformation.
How does dynamic deformation affect grain refinement?
During the dynamic deformation process, grain refinement is particularly pronounced. For the 8 passes of ECAP copper subjected to dynamic compression with a true strain of 0.57 (Simulation 1), the average grain size decreases significantly by one order of magnitude, from 2.9 µm to 0.3 µm.
Does grain refinement affect strain hardening of metals during dynamic deformation?
A visualization approach is provided to determine the spatial position of the new grain boundary based on the energy minimization path. The developed constitutive model and the visualization approach are utilized to investigate the effect of grain refinement on strain hardening of metals during dynamic deformation.
What is grain refinement?
Grain refinement is a widely used approach for the effective strengthening of metals and alloys based on the Hall–Petch relationship 1. It is an inherent outcome of various physical metallurgical processes such as solidification, plastic deformation, and recrystallization 2.