Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 518, Issue 1-2, Pages 139-143Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2009.04.036
Keywords
Fe-Mn-Si shape memory alloy; Martensitic transformation; Thermo-mechanical treatment; Carbide
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Funding
- National Science Council (NSC), Republic of China [NSC 95-2221-E-035-037, NSC 97-2221-E-002-034-MY3]
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The effects of slight tantalum (Ta) addition on the microstructures, precipitates, martensitic transformation and shape memory performance of Fe-30Mn-6Si-based alloys were investigated. Experimental results show that the slight Ta addition will increase the c/a ratio of e martensite, reduce the M-s temperature and improve the alloy's shape recovery ability. After TMT at 650 degrees C, the alloy's M-s temperature is reduced and lots of (Fe, Mn)(3)Si and TAC precipitates form. The effective nuclei and well-aligned precipitates within the grain interior after TMT will improve significantly the alloy's shape memory performance. (C) 2009 Elsevier B.V. All rights reserved.
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