|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||Mechanical Properties and Thermal Stabilization of Nanocrystalline Aluminum and Aluminum Alloys
||Khaled Youssef, Ronald Scattergood, Carl Koch
|On-Site Speaker (Planned)
The development of bulk nanomaterials for structural applications has been severely limited by the poor tensile ductility and the thermally unstable nanograins at low temperatures. The poor ductility is attributed to defects introduced by processing, and/or the low strain-hardening capacity of nanograins. ln few cases where defects are eliminated, exceptional combinations of high strength and good ductility have been demonstrated. The poor thermal stability of nanocrystalline metals is a result of the large excess energy/volume of the grain boundaries. A limited number of studies have demonstrated that thermal stability of nanocrystalline alloys can be improved. This has been attributed to various pinning mechanisms for the grain boundaries, or to a reduction in the grain-boundary energy due to solute segregation, which can reduce the grain-boundary energy, resulting in a thermodynamically stable nanostructure. Accordingly, in this work we will shed light on the thermal stability and properties of various nanocrystalline metallic systems.
||Planned: Supplemental Proceedings volume