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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2016
Presentation Title Fracture of Severely Plastically Deformed Niobium and Tantalum
Author(s) Anton Hohenwarter
On-Site Speaker (Planned) Anton Hohenwarter
Abstract Scope A popular method nowadays to produce nanostructured bulk materials is provided through methods of severe plastic deformation (SPD). Such methods such as equal channel angular pressing and high pressure torsion are capable of imposing extraordinarily high deformation strains onto mostly coarse-grained pre-materials and induce in this way substantial grain refinement. The achievable grain size, varying strongly on deformation temperature and purity of the metal can be well below 100 nm. The grain refinement and the connected beneficial effects on the mechanical properties, such as high strength, have been in focus for several years. Nevertheless, fracture related properties have been often neglected. In this contribution the fracture behavior of SPD-processed niobium and tantalum will be compared and discussed. It will be shown that the specimen orientation can have a tremendous influence on the fracture behavior and fracture toughness.
Proceedings Inclusion? Planned: A print-only volume


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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