About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
Presentation Title |
Sensitization and Stress Corrosion Cracking of Alloy 800H by Laser Powder Bed Fusion |
Author(s) |
Jingfan Yang, Xiang Liu, Miao Song, Lingfeng He, Xiaoyuan Lou |
On-Site Speaker (Planned) |
Jingfan Yang |
Abstract Scope |
Alloy 800H (UNS No. N08810), also known as Incoloy 800H, has been widely used in many high-temperature water systems due to its excellent corrosion resistance and creep resistance. However, as some types of austenitic stainless steels and nickel-base alloys, this material was found susceptible to intergranular stress corrosion cracking (IGSCC) within the sensitization temperature range. This study explored the sensitization susceptibility of the additively manufactured (AM) Alloy 800H and related stress corrosion cracking (SCC) performance. With a particular interest in the carbide formation kinetics in the laser fused non-equilibrium AM structure, the study covers a wide range of heat treatment conditions. The special roles of high-angle grain boundary and unique cellular/columnar sub-grain structure to the sensitization susceptibility of AM Alloy 800H are discussed. The correlated SCC tests are also conducted on specimens with the representative heats to understand the relationship between sensitization and IGSCC susceptibility. |
Proceedings Inclusion? |
Planned: |