Factors Influencing the Reversion of Stress-induced Martensite to Austenite in a Fe-Mn-Si-Cr-Ni Shape Memory Alloy

It is well known that one way shape memory effect (SME) in Fe-Mn-Si-based shape memory alloys (SMAs) is related to the thermally induced reversion of ε (hexagonal close packed, hcp) stress-induced martensite (SIM) to γ (face centered cubic, fcc) austenite. In the case of a Fe-Mn-Si-Cr-Ni SMA, this r...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2009-08, Vol.18 (5-6), p.500-505
Main Authors: Bujoreanu, Leandru G., Stanciu, Sergiu, Comaneci, Radu I., Meyer, Markus, Dia, Vasile, Lohan, Ciprian
Format: Article
Language:English
Subjects:
Austenite
Characterization and Evaluation of Materials
Corrosion and Coatings
Engineering Design
Ferrous alloys
Martensite
Martensitic transformations
Materials Science
Quality Control
Quenching
Reliability
Reversion
Safety and Risk
Shape memory alloys
SIM
Tribology
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Summary:It is well known that one way shape memory effect (SME) in Fe-Mn-Si-based shape memory alloys (SMAs) is related to the thermally induced reversion of ε (hexagonal close packed, hcp) stress-induced martensite (SIM) to γ (face centered cubic, fcc) austenite. In the case of a Fe-Mn-Si-Cr-Ni SMA, this reverse martensitic transformation was analyzed in regard to the critical temperature for the beginning of austenite formation ( A s ) in different states characterized by quenching temperature and permanent tensile strain. For this purpose, dynamic mechanical analysis (DMA), dilatometry (DIL), differential thermal analysis (DSC), and optical microscopy (OM) were employed to determine the influence of quenching temperature and permanent tensile straining on SIM reversion to austenite during heating.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-009-9499-2