Deformation Mechanisms in Multilayered Materials for High Temperature Application
Final technical rept. 1 Jan 2000-31 Mar 2001
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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The general aim of the proposed research is to understand how nanoscale laminates with optimal strength, ductility, and elevated temperature stability can be engineered through the selection of component chemistry, component layer thickness, and interfacial and grain boundary structure. The first effort is to develop computational tools to model the deformation and fracture processes in nanoscale laminates based on a well-known intermetallic system. The second effort is to apply the computational tools to at least one additional laminate system. This report describes our efforts over the past year to model critical features which control the strength of interfaces to dislocation transmission, and to study the morphological stability of Ni A1Ni3A1 that are heated to elevated temperature for prolonged periods. These two areas are critical to optimizing both the plastic strength and elevated temperature stability of nanoscale materials.
- Laminates and Composite Materials