Dissolvable Salt Inserts Enabling Complex And Porous Titanium Structures To Be Consolidated From Powder At Low Cost (Showcased Via FAST Of Hydrogen Electrolyser Plates From Circular Economy Titanium Waste)

Authors:

Iain Berment-Parr (The Manufacturing Technology Centre Ltd., United Kingdom),
Owen Larkin (The Manufacturing Technology Centre Ltd., United Kingdom),
Kieran Bullivant (The Manufacturing Technology Centre Ltd., United Kingdom),
Simon J Graham (The University of Sheffield, United Kingdom),
Ahmad El-Kharouf (The University of Birmingham, United Kingdom)

Abstract:

Net shape powder consolidation is often perceived to be a slow and costly manufacturing method, unsuitable for high throughput batch production of intricate components. This work seeks to challenge that perception by introducing the use of dissolvable space holding inserts that impart an impression into densifying powders. When used under appropriate conditions, these enable simple cylindrical HIP canisters and FAST dies to be used to process complex geometry components and porous structures. Feasibility trials have evaluated the use of water soluble table salt (NaCl) in various forms, combining it with sustainable titanium powders obtained through low energy processing. High integrity titanium samples have been densified, and then extracted by dissolving the salt in water. Fabrication of an innovative hydrogen electrolyser bipolar plate has showcased the industrial potential of this manufacturing method. An embodied carbon analysis has also highlighted significant circular economy advantages compared to traditional energy intensive titanium supply chains.

DOI:

https://doi.org/10.59499/WP225367167