| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation-induced Manipulation of Defect Structures and Hierarchical Microstructures
|
| Presentation Title |
Exploiting Hydrogen Segregation Effects for Controlling Microstructure Evolution |
| Author(s) |
Haoxue Yan, C. Cem Tasan |
| On-Site Speaker (Planned) |
Haoxue Yan |
| Abstract Scope |
Even ppm levels of hydrogen in metals can change behaviors of crystallographic defects, such as dislocations and grain boundaries. Here, we propose that such effects of hydrogen can be used to regulate microstructure evolution. In this presentation, we show that a gradient microstructure can be achieved in commercially pure aluminum by introducing hydrogen during recrystallization treatments. To understand the fundamental aspects of this approach, we study the relationship between recrystallization driving force and hydrogen content. The effect of hydrogen on recrystallization kinetics are also examined via scanning differential calorimetry analyses and discussed in terms of Turnbull’s classical rate equation for interface migration. The applicability of the proposed approach in other metal systems will be discussed. This work suggests new strategies to overturn the detrimental effects of hydrogen into opportunities for designing beneficial microstructures. |
| Proceedings Inclusion? |
Planned: |