Abstract
A rate dependent crystal plasticity model for the α/β Ti-Al alloy Ti-6Al-4V with duplex microstructure is developed and presented herein. Duplex Ti-6Al-4V is a dual-phase alloy consisting of an hcp structured matrix primary α-phase and secondary lamellar α + β domains that are composed of alternating layers of secondary α laths and bcc structured residual β laths. The model accounts for distinct three-dimensional slip geometry for each phase, anisotropic and length scale dependent slip system strengths, the non-planar dislocation core structure of prismatic screw dislocations in the primary α-phase, and crystallographic texture. The model is implemented in the general purpose finite element code (ABAQUS, 2005. Ver 6.5, Hibbitt, Karlsson, and Sorensen, Inc., Pawtucket, RI) via a UMAT subroutine.
| Original language | English |
|---|---|
| Pages (from-to) | 1457-1485 |
| Number of pages | 29 |
| Journal | International Journal of Plasticity |
| Volume | 23 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 2007 |
| Externally published | Yes |
Funding
This work was sponsored by the Air Force Office of Scientific Research, USAF, under Grant No. FA9550-04-1-0418. The grant is funded through the metallic materials program (B. Connor, program manager). The views and conclusions herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the Air Force Office of Scientific Research or the US Government.
Keywords
- A. Microstructures
- Anisotropic material
- B. Crystal plasticity
- C. Finite elements
- Polycrystalline material