About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
Presentation Title |
Stress Corrosion Cracking and Corrosion-fatigue Behavior of Additively Manufactured 17-4PH |
Author(s) |
James Burns, Trevor Shoemaker |
On-Site Speaker (Planned) |
James Burns |
Abstract Scope |
Additively manufactured (AM) components are being considered for use in high performance structural applications where environmental cracking behavior is often an important failure mode. As such it is critical to rigorously characterize the stress corrosion cracking and corrosion fatigue behavior of AM components of higher performance alloys such as 17-4PH. To this end the environmentally assisted crack growth rates (both da/dN vs ΔK and da/dt vs K) of wrought and AM 17-4 PH (at the same strength level) are characterized via linear elastic fracture mechanics testing in NaCl environments at various potentials. Differences in the growth rates and cracking morphology are interpreted in the context of a detailed characterization of the microstructure features of both the wrought and AM samples. These quantitative data and microstructure-based understanding will inform the efficacy of using AM components in structural applications and the modifications of the AM processing parameters to enhancing environmental cracking behavior. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |