| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Comparison of Intergranular Fracture Behavior Between Sulfur Doped Nickel Grain Boundaries |
| Author(s) |
Doruk Aksoy, Rémi Dingreville, Douglas E. Spearot |
| On-Site Speaker (Planned) |
Doruk Aksoy |
| Abstract Scope |
The fracture behavior of crystalline metals is affected by the presence of segregants in the system. One system which displays this behavioral change is the nickel-sulfur system. The embrittling behavior caused by sulfur is quantified by using a thermodynamic property known as the embrittling potency. This property can be used to characterize the intrinsically ductile nickel grain boundaries by their susceptibility to embrittlement. In this work, an extensive study of pure tilt grain boundaries is conducted via molecular dynamics simulations to explore the relationship between sulfur segregation and intergranular fracture behavior from a structural point of view. The embrittling potencies across lattices are matched mechanically to isolate the role of the grain boundary structure on interfacial fracture. Then, using cohesive-zone volume elements, the decohesion behavior for different grain boundaries is extracted. This data is analyzed to categorize and characterize grain boundaries in terms of their structural and fracture related properties. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |