| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloy Behavior and Design Across Length-Scales: An SMD Symposium Honoring Easo George
|
| Presentation Title |
Strong Effects of Tiny Compositional Changes on Structural and Functional Material Properties |
| Author(s) |
Gunther F. Eggeler |
| On-Site Speaker (Planned) |
Gunther F. Eggeler |
| Abstract Scope |
In materials technology it is not uncommon to come across cases, where tiny compositional changes strongly affect structural and functional properties. A few examples from different fields are presented. Thus, it is shown how segregation of S/Sb to grain boundaries in Fe/Cu-based alloys promotes the formation of creep cavities. The segregation of alloy elements to planar faults in ordered intermetallic systems is discussed. It is then shown how small variations in Ni-concentration in a NiTi shape memory alloy affect phase transition temperatures and how the uptake of small quantities of C and O during ingot metallurgy of NiTi shape memory alloys affects phase transformation temperatures and structural fatigue lives. And finally, a case study is presented which shows how the creep behavior of a Re-free Ni-base single crystal superalloy changes when its low W content is reduced by a factor of 2. Implications for alloy design are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Phase Transformations, Solidification |