Conference Tools for 2020 TMS Annual Meeting & Exhibition
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Meeting
2020 TMS Annual Meeting & Exhibition
Symposium
Refractory Metals 2020
Presentation Title
Effect of Strain Rate on the Anisotropic Tensile Mechanical Properties of High Purity Niobium Single Crystals
Author(s)
Jean-Francois Croteau, Eureka Pai Kulyadi, Chaitanya Kale, Di Kang, Derek Siu, Thomas R. Bieler, Philip Eisenlohr, Kiran Solanki, Elisa Cantergiani, Nicolas Jacques, Daniel Balint, Paul Hooper, Said Atieh
On-Site Speaker (Planned)
Jean-Francois Croteau
Abstract Scope
An investigation of the mechanical properties of differently oriented high-purity niobium single crystals deformed in tension at strain rates between 10
-4
to 10
3
s
-1
is presented. Specimens were cut from a large grain niobium disk used for the manufacturing of SRF cavities. The strain rate sensitivity and the associated activation volume are presented for a specific orientation. Different crystallographic tension directions exhibit significantly different softening and hardening behaviors and elongation at fracture. Such anisotropy is reduced at high strain rates. The effect of early necking, adiabatic heating and the activation of multiple slip systems on the tensile split Hopkinson results is discussed. An attempt is made to explain the differences in flow stress based on crystal orientation evolution during deformation.
Proceedings Inclusion?
Planned: Supplemental Proceedings volume
OTHER PAPERS PLANNED FOR THIS SYMPOSIUM
Alloying for Precipitation Hardening in Chromium
Development of Refractory Complex Concentrated Alloys RCCAs Using Diffusion Couple Approach
Dislocation Multiplication from a Frank-Read Source in Six Body-centered Cubic Refractory Metals
Dynamic Grain Growth in Refractory Metals
Effect of Dislocations and Grain Boundaries on Magnetic Flux Trapping in High-purity Niobium used for Superconducting Radio Frequency Cavities
Effect of Strain Rate on the Anisotropic Tensile Mechanical Properties of High Purity Niobium Single Crystals
Hot Isostatic Pressing of WC-3009 Niobium-Based Refractory Alloy
Intermetallic Precipitate Reinforced Refractory Metal Alloys toward ‘bcc-superalloys’
Mechanical Testing of Tungsten-Steel Laminate Composites for use in Fusion Applications
Microstructure, Microhardness and Oxidation Behavior of Mo-Si-B alloys in the Moss+Mo2B+Mo5SiB2 Three Phase Region
Modifying Grain Boundary Cohesion in Ultra-fine Grained Tungsten and Tungsten-based Nanocomposites through Systematic Doping
Molybdenum Foil Tensile Testing
Performance of Niobium and Molybdenum Alloys for High Temperature Sensing Applications
Pressureless Sintering and Microstructure Evolution of Ultrafine-grained Tungsten
Refractory Alloys 3D Printing for Missile and Space Applications
Seeking Toughness in Mo-Si-B: Composites of Stable Oxides
Static and Dynamic Grain Growth in Niobium at 1200 to 1500℃
The Influence of Dislocation Density on Thermal Conductivity in Pure Niobium from 2-9K
Thermally Activated Deformation Processes in W-Re Alloys
ZrC-W Composites Prepared by Reactive Melt Infiltration of Zr2Cu Alloy into Binder-jet Printed WC Preforms
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