|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||L-138: Manipulating the Grain Boundary Structure of an Ultrafine Grained Cu-Zr Alloy to Enhance Strain Hardening Capability and Strength
||Dengshan Zhou, Deliang Zhang
|On-Site Speaker (Planned)
The nanocrystalline and ultrafine grained metallic materials normally lack strain hardening ability due to rapid dynamic recovery of dislocations at boundaries of nanometer and submicron grains. Due to this effect, these materials just show a uniform strain of 2-3% before reaching their ultimate tensile strength during tensile tests. We found that the strain hardening capability of an ultrafine grained Cu-Zr alloy, produced by a combination of spark plasma sintering and hot rolling, can be substantially improved via the formation of a unique grain boundary structure. The plastic strain of the uniform deformation stage (6-8%) of the sample with the unique grain boundary structure during tensile testing was two times that of the as-rolled sample, making the former achieve a clearly higher tensile strength.
||Planned: Supplemental Proceedings volume