|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||L-150: Strong, Ductile, Thermally Stable Cu-based Metal-intermetallic Nanostructured Alloys
||Keith Dusoe, Sriram Vijayan, Thomas Bissell, Mark Aindow, Seok-Woo Lee
|On-Site Speaker (Planned)
Bulk metallic glasses (BMGs) and nanocrystalline metals (NMs) have been investigated extensively due to their superior mechanical properties. However, their practical application has been limited by their low ductility at room temperature and poor microstructural stability at elevated temperatures. Thus, there is a clear need for a metallic system which can overcome the performance shortcomings of BMGs and NMs. Recently, we discovered novel Cu-based and Ni-based metal-intermetallic nanostructured composites (MINCs), which exhibit high yield strengths (over 1.7 GPa), high compressive ductility (over 18%) and superior microstructural stability at an elevated temperature higher than the glass transition temperature of their counterpart metallic glasses. In this presentation, we will discuss the important roles of intermetallic compound phases to explain the exceptional mechanical properties and superior thermal stability of our MINCs. We will also discuss how the cooling rate affects their strength and ductility in terms of their unique phase boundary sliding mechanisms.
||Planned: Supplemental Proceedings volume