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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2016
Presentation Title Thermally Activated Deformation Processes in Body-Centered Cubic Cr – How Microstructure Influences Strain-Rate Sensitivity
Author(s) , Anton Hohenwarter, Reinhard Pippan, Daniel Kiener
On-Site Speaker (Planned)
Abstract Scope The microstructure dependent deformation behavior of Chromium, especially in terms of strain-rate sensitivity (SRS), was studied by means of improved nanoindentation methods as a function of temperature up to 300 C. Cr was investigated in the single crystalline (sx) and ultrafine-grained (ufg) condition. With increasing temperature a decreasing SRS was determined for sx-Cr, while for ufg-Cr a significant increase upon overcoming Tc was measured. This could be attributed to the increased importance of dislocation – grain boundary interactions, and a change in the dominating deformation behavior. Finally, the results were further compared to other refractory metals, such as Mo and Nb, in order to get an overall understanding of the underlying deformation processes in bcc-metals.
Proceedings Inclusion? Planned: A print-only volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Effect of Silicon on Texture of Niobium
Etched Surface of CVTD Single Crystal Tungsten Coating after Serving under High Temperature
Fracture of Severely Plastically Deformed Niobium and Tantalum
High Temperature Properties of Directionally Solidified Nb-rich Nb-Si-Cr Eutectics
Improving the Performance of Nb-Silicide Based Refractory Alloys through a Novel Cold Crucible Directional Solidification
Influences of Rare Earth on Microstructures and Mechanical Properties of Functionally Graded Cemented Carbides
Introduction of Precisely Controlled Microstructural Defects into SRF Cavity Nb Sheet and Their Impact on Local Superconducting Properties
Manufacturing of Bulk Ultrafine Grain Tungsten from Nanocrystalline Tungsten Powder and Its Potential Application for Nuclear and Fusion Reactors
Mechanical Properties of Cold-rolled Tungsten at Different Strain Rates
Micro-Mechanical Characterization of Micro-Architectured Refractory Metal Coatings
Micromechanical Testing of Multi Compositional Tungsten Thin Film Alloys
Microstructure and Properties of a Ternary Eutectic Mo-Si-B Alloy
On Plasticity of Polycrystalline Rhenium at Room Temperature
Reactive Spark Plasma Sintering of Tungsten Borides Using Elemental Tungsten and Boron Powders
Size Effect of Intermetallic Compounds on Fracture Toughness of Mo-Si-B Alloys
Stress Accommodation in Plastic Zone Ahead Crack Tip in Iridium
The Initiation and Propagation of Dynamic Abnormal Grain Growth in Refractory Metals
Thermally Activated Deformation Processes in Body-Centered Cubic Cr – How Microstructure Influences Strain-Rate Sensitivity

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