Thermally-activated constitutive model including dislocation interactions, aging and recovery for strain path dependence of solid solution strengthened alloys: Application to AA5754-O

Published

December 1, 2015

Author(s)

Minh-Son Pham, Mark A. Iadicola, Adam A. Creuziger, Lin Hu, Anthony D. Rollett

Abstract

A thermally-activated constitutive model is developed based on dislocation interactions, crystallographic orientations and microstructural evolution to describe the elasto-plastic stress-strain behavior during multi-axial loading. The aim is to contribute to the quantification of complex strain path response in solid solution strengthened alloys. In detail, dislocation/dislocation interactions are incorporated in the model to quantify latent and kinematic hardening phenomena during loading path changes. Dislocation density-based constitutive relations are included to account for dislocation features such as dislocation forests, walls and channels. More specifically, dislocation/solute atom interactions are also considered in order to account for both dynamic and static strain aging as well as static recovery. The model is validated against multiple multi-axial data sets for AA5754-O with changes of loading path and various degrees of pre-strain and time intervals between tests.

Citation

International Journal of Plasticity

Volume

75

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.ijplas.2014.09.010

Keywords

Dislocation interaction, Strain path dependence, Aging, Recovery, Solid solution

Citation

Pham, M. , Iadicola, M. , Creuziger, A. , Hu, L. and Rollett, A. (2015), Thermally-activated constitutive model including dislocation interactions, aging and recovery for strain path dependence of solid solution strengthened alloys: Application to AA5754-O, International Journal of Plasticity, [online], https://doi.org/10.1016/j.ijplas.2014.09.010 (Accessed April 20, 2024)