| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced High Strength Steels IV
|
| Presentation Title |
Mechanisms of Embrittlement and Recovery in Cast HY-80 High-strength Low-alloy Steel |
| Author(s) |
Matthew C. Draper, Sreeramamurthy Ankem |
| On-Site Speaker (Planned) |
Matthew C. Draper |
| Abstract Scope |
HY steels were designed as a solid solution strengthened grade for both high yield strength and high impact toughness in structural applications for Naval vessels. Both lower cost and higher reliability treatments have been studied via developing an improved understanding of the structural evolution and corresponding changes in mechanical behavior for the alloy. Metallographic along with computational work supports a conclusion that temper embrittlement and subsequent recovery in the HY system cannot be solely explained by the segregation of phosphorus and other embrittling elements to grain boundaries. Rather it is shown for the first time that alloy carbides play a key role in embrittlement for this system. In addition, a novel treatment has been developed to reduce hydrogen aging times by up to 90% in industrial manufacture. Ongoing work is employing models built for the nucleation, dissolution, and coarsening of carbides to develop next-generation HY steels. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |