|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Computational Materials Discovery and Optimization – From Bulk to Materials Interfaces and 2D Materials
||Modeling the Hydroforming of Large Grain Niobium Tube
||Aboozar Mapar, Thomas R Bieler, Farhang Pourboghrat
|On-Site Speaker (Planned)
Currently most of superconducting Niobium (Nb) cavities are manufactured from fine grain Nb sheets. As-cast ingots go through a series of steps including forging, milling, rolling, and intermediate annealing, before they are deep-drawn into a half-cell shape and subsequently electron beam welded to make a full cavity. Tube hydroforming, a manufacturing technique where a tube is deformed into a die using a pressurized fluid, is an alternative to the current costly manufacturing process. A whole cavity can be made from a tube using tube hydroforming. This study focuses on deformation of large grain Nb tubes during hydroforming. The crystal orientation of the grains is recorded. The tube is marked with a circle-grid which is used to measure the strain after deformation. The deformation of the tube is modeled with crystal plasticity finite element. The results of the simulation and experiments are compared.
||Definite: None Selected