| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Mechanisms and Mitigation of Aqueous Corrosion and High-temperature Oxidation
|
| Presentation Title |
SCC Behavior of IN 718 in BWR Conditions |
| Author(s) |
Amanda Leong, Jinsuo Zhang, George Pabis |
| On-Site Speaker (Planned) |
Amanda Leong |
| Abstract Scope |
Additive manufactured Inconel 718 hold down springs can potentially serve as a replacement for 3-leaf spring. The design of AM hold down spring can be easily to modified to accommodate different fuel assembly and reactor designs, minimizing the upper core wear, reworking, and number of parts. This work discusses the stress corrosion cracking (SCC) behavior of hardened additively manufactured IN 718 in Boiling Water Reactor (BWR) environments at 288°C. The behavior of the material’s crack-propagation rate as a function of crack-tip stress-intensity was examined. Dissolved oxygen concentration in the environment has small effects on the crack-propagation rates. The material’s crack-propagation rates plateau at an average of 4x10⁻⁶ mm/s with max stress intensity factor measured at 63.6Mpa√m. Most cracks observed were intergranular cracks (IG) with some transgranular crack (IG) branching out from IG cracks. |