About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation and Damage Mechanisms of High Temperature Alloys
|
Presentation Title |
Deformation Twinning during Elevated Temperature Testing in HAYNES® 244® Alloy |
Author(s) |
Thomas Mann, Michael Fahrmann, Michael Titus |
On-Site Speaker (Planned) |
Thomas Mann |
Abstract Scope |
HAYNES® 244® alloy was designed as a high strength, low CTE alloy for use in advanced gas turbine engines. The alloy’s remarkable mechanical properties arise from the distribution of a novel intermetallic phase, the γ´´´-Immm Ni2(Cr, Mo, W) phase, that enables complex deformation mechanisms over orders of magnitude of strain rates. We elucidated these deformation mechanisms and observed deformation twinning during elevated temperature tensile testing and low cycle fatigue, and more complex shearing and dislocation bowing mechanisms during high temperature creep. These mechanisms will be compared to other Ni-based superalloys strengthened through other intermetallic phases such as γ´ and γ´´, and we will detail how the Immm Ni2(Cr, Mo, W) phase improves the strength, ductility, work hardening, and damage tolerance of this alloy. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Mechanical Properties, Characterization |