|About this Abstract
||2nd International Conference on Technological Innovations in Metals Engineering (TIME)
||Technological Innovations in Metals Engineering (TIME)
||Structural Comparative Study of Hydrogen Effects on Electrochemically Charged Additive Manufactured by Electron Beam Melting (EBM) and Wrought Ti-6Al-4V Alloys
||Nissim Navi, Jonathan Tenenbaum, Eyal Sabatani, Giora Kimmel, Roey Ben David, Brian A. Rosen, Zahava Barkay, Eitan Tiferet, Yaron Ganor, Noam Eliaz
|On-Site Speaker (Planned)
Ti–6Al–4V might be degraded by hydrogen entering the material during processing, post-treatments, or service. Here, we explored the correlation between hydrogen behavior and microstructure of electrochemically charged Ti–6Al–4V processed by electron beam melting (EBM) in comparison with its counterpart wrought alloy having a similar beta content (~6 wt.%). Differences in the size, shape, and distribution of the beta-phase in these alloys promote alfa hydride (hcp) to delta-TiHx hydride phase transformation in the EBM alloy and makes it more prone to hydrogen-induced cracking along interphases. The higher hydride content at the surface of the EBM alloy could either inhibit further hydrogen entry from the environment and serve as a source of hydrogen when sufficient energy is employed to decompose the hydride. The results of this study imply that a post-treatment that increases the size of the beta particles can help improving the resistance of EBM Ti–6Al–4V to hydrogen embrittlement.