The experimental modelling vs. numerical simulation of (γ+α2)-TiAl/Al₂O₃ ceramic-metal nanocomposites

35^th World Congress on Materials Science and Nanotechnology

July 22-23, 2019 Melbourne, Australia

B Amirian, H Y Li and J D Hogan

University of Alberta, Canada

Scientific Tracks Abstracts: J Material Sci Eng

Abstract :

In the present study, a microstructure-based finite element model for a two phase titanium aluminide alumina cermet is proposed based on a modified Gurson model. A face-centered cubic unit cell structure is used to obtain the high particle volume fraction. Then, an experimental quasistatic compression test together with a novel digital image correlation technique is performed to validate the modelling results. Once validated, the effect of varying the mechanical properties and microstructure parameters on material response and deformation evolution are explored. In addition, some of the unique mechanical properties of this material such as strain hardening parameters are found for the first time. Moreover, according to the size of the pores and inclusions, the interface effect for inclusion-inclusion, inclusion-matrix, void-inclusion and void-matrix are also considered. The results for both stress-strain curve and the deformation evolution shows a good agreement with experimental data and can serve as a foundation for future microstructure optimization.

Biography :

B Amirian has completed his Master's Degree in mechanical engineering from Isfahan University of Technology, Iran. He is currently investigating the microstructural behavior of novel cermet materials.

E-mail: benhour@ualberta.ca