The high-temperature strength of some Fe3Al alloys |
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| Affiliation: | 1. Department of Physical Metallurgy, CENIM, CSIC, Avenida Gregorio del Amo 8, E-28040 Madrid, Spain;2. Instituto de Cerámica y Vidrio, CSIC, Campus de Cantoblanco, Camino de Valdelatas, E-28049 Madrid, Spain;1. Instituto de Engenharia Mecânica, Universidade Federal de Itajubá (IEM/UNIFEI). Avenida BPS, 1303, Itajubá, MG 37500–903, Brazil;2. Escola de Engenharia de Lorena, Universidade de São Paulo (EEL-USP). Estrada Municipal do Campinho, s/n, Lorena, SP 12600–000, Brazil;3. Université de Lorraine, CNRS, IJL, Nancy, France;1. International Advanced Research Center for Powder Metallurgy and New Materials, Hyderabad, 500 005, India;2. Indian Institute of Technology Madras, Chennai, 600 036, India;1. Department of Materials Science, Saarland University, D-66041 Saarbrücken, Germany;2. Department of Engineering Design and Materials, Norwegian University of Science and Technology, No-7491 Trondheim, Norway;1. Brandenburg University of Technology Cottbus-Senftenbereg, Konrad-Wachsmann-Allee 17, Cottbus, D 03046, Germany;2. Access e.V., Intzestr. 5, 52072, Aachen, Germany |
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| Abstract: | The high-temperature strength of a Fe–25%Al–2%Nb alloy in both a solutionised state and a precipitated state has been determined for temperatures up to 900 °C and compared with that of a solution hardened Fe3Al alloy. Some comparisons of these materials with previously reported Fe3Al-based materials are also made. The Fe–25%Al–2%Nb material is capable of retaining good strength to temperatures above 800 °C, but rapid coarsening of the Laves precipitate particles at higher temperatures leads to strength loss at such temperatures. The presence of stable dispersed particles at the intermediate temperatures means that good strength can be retained to very low strain rates. |
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