Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 617, Issue -, Pages 120-123Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.07.136
Keywords
Shape memory; Microstructure; Precipitation; Mechanical properties
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Funding
- JSPS, Japan
- Grant for Excellent Graduate School from MEXT, Japan
- Grants-in-Aid for Scientific Research [22226011] Funding Source: KAKEN
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The microstructure, martensitic transformation and superelasticity were examined in Fe-30Ni-15Co-10Al-2.5Ti-0.05B polycrystalline alloy sheets. Thermoelastic transformation was obtained in an aged specimen at 550 degrees C with the gamma (FCC) + gamma' (L1(2)) structure. Moreover, it was found that a {012}< 100 > recrystallization texture was formed and that the high fraction of low energy boundaries was increased in a 98.5% cold-rolled specimen. Suppression of brittle precipitation during aging was directly observed at those boundaries, resulting in improvement of ductility, and superelastic strain of over 4% was obtained in the polycrystalline alloy in a tensile test at room temperature. (C) 2014 Elsevier B.V. All rights reserved.
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