The Influence of Grain Interactions on the Plastic Stability of Heterophase Interfaces

Jason R Mayeur; Irene J Beyerlein; Curt A Bronkhorst; Hashem M Mourad

doi:10.3390/ma7010302

The Influence of Grain Interactions on the Plastic Stability of Heterophase Interfaces

Materials (Basel). 2014 Jan 13;7(1):302-322. doi: 10.3390/ma7010302.

Authors

Jason R Mayeur¹, Irene J Beyerlein², Curt A Bronkhorst³, Hashem M Mourad⁴

Affiliations

¹ Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. jmayeur@lanl.gov.
² Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. irene@lanl.gov.
³ Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. cabronk@lanl.gov.
⁴ Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. hmourad@lanl.gov.

Abstract

Two-phase bimetal composites contain both grain boundaries and bi-phase interfaces between dissimilar crystals. In this work, we use a crystal plasticity finite element framework to explore the effects of grain boundary interactions on the plastic stability of bi-phase interfaces. We show that neighboring grain interactions do not significantly alter interface plastic stability during plane strain compression. The important implications are that stable orientations at bimetal interfaces can be different than those within the bulk layers. This finding provides insight into bi-phase microstructural development and suggests a pathway for tuning interface properties via severe plastic deformation.

Keywords: crystal plasticity; grain interactions; interface stability; nanolamellar composites; rolling texture.