About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Vacancy Engineering in Metals and Alloys
|
| Presentation Title |
Assessing the Mechanical Properties of Iron Aluminides: Strength and Brittle-to-Ductile Transition |
| Author(s) |
Jan Lars Riedel, Alexander Kauffmann, Stefan Guth, Marcel Münch, Jung Soo Lee, Anwesha Kanjilal, Frank Stein, James P. Best, Martin Heilmaier |
| On-Site Speaker (Planned) |
Jan Lars Riedel |
| Abstract Scope |
Iron aluminides possess inherent brittleness at room temperature and below, but they become ductile at temperatures above the brittle-to-ductile transition temperature (BDTT) [1]. The BDTT was found to strongly depend on the Al content with a steep increase between 42 and 45 at.% Al [1], which remains incompletely understood until today. To investigate this behavior, a series of iron aluminide alloys with Al-contents ranging from 30 to 53 at.% were cast, maintaining consistent impurity levels and subjected to identical heat treatment procedures. Initial mechanical characterization was performed via uniaxial compression testing to assess temperature-dependent strength, serving as a precursor to subsequent three-point bending experiments aimed at precise BDTT determination. All mechanical tests were conducted in vacuum across the temperature range from room temperature up to 700°C. This methodology enabled a systematic evaluation of the influence of temperature on yield strength, strain hardening, microstructure and fracture surfaces across the compositional spectrum. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, Other |