|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Processing of Nanostructured Powders and Nanopowders by Consolidation
||Modified Strain Rate Regime in Consolidated Ultrafine Copper Powders with Silver Micro-alloying
||Yannick Champion, Julie Bourgon, Xavier Sauvage
|On-Site Speaker (Planned)
Ultrafine grained (UFG) copper with average grain size of 115 nm is micro-alloyed with silver (UFG CuAg) to analyze the effect on the strain rate sensitivity. The materials are prepared by sintering a copper-silver fine powder using the spark plasma sintering technique after H2 pre-annealing for oxide reduction. Mechanical testings show that UFG CuAg follows the relation relating strain rate sensitivity (m) and stress (sigma) established for UFG Cu: m varies as 1/sigma . Main difference compared to pure UFG copper is a large value of the parameter characterizing the properties of the grain boundaries indicating the dominant role of the grain boundaries structure and chemistry on the rheology of UFG metals.
||Planned: A print-only volume