Date
2015Author
Krooß, PhilippKadletz, Peter M.Somsen, ChristophGutmann, Matthias JosefChumlyakov, Yuriy I.Schmahl, Wolfgang WilhelmMaier, Hans JürgenNiendorf, ThomasSubject
620 Engineering 660 Chemical engineering Memory-LegierungHochtemperaturverhaltenMartensitumwandlungDegradation <Technik>PseudoelastizitätMetadata
Show full item record
Aufsatz
Cyclic degradation of Co49Ni21Ga30 high-temperature shape memory alloy - On the roles of dislocation activity and chemical order
Abstract
Conventional shape memory alloys (SMAs), such as binary Ni-Ti, are typically limited to service temperatures below 100 °C. Recent studies on Co-Ni-Ga high temperature (HT) SMAs revealed the potential that these alloys can be used up to temperatures of about 400 °C. Analysis of the cyclic functional properties showed that degradation in these alloys is mainly triggered by intensive dislocation motion. However, data on the cyclic stress-strain response and the mechanisms leading to functional degradation of Co-Ni-Ga above 300 °C were missing in open literature. Current results reveal that above 300 °C diffusion controlled mechanisms, e.g. precipitation of secondary phases and changes in the chemical degree of order, seem to dictate cyclic instability. Detailed neutron and transmission electron microscopy analyses following superelstic cycling in a temperature range of 200 °C to 400 °C were employed to characterize the changes in degradation behaviour above 300 °C.
Citation
In: Shape Memory and Superelasticity Volume 2 / Issue 1 (2015) , S. 37-49 ; eissn:2199-3858Additional Information
This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections.Citation
@article{doi:10.17170/kobra-202312219261,
author={Krooß, Philipp and Kadletz, Peter M. and Somsen, Christoph and Gutmann, Matthias Josef and Chumlyakov, Yuriy I. and Schmahl, Wolfgang Wilhelm and Maier, Hans Jürgen and Niendorf, Thomas},
title={Cyclic degradation of Co49Ni21Ga30 high-temperature shape memory alloy - On the roles of dislocation activity and chemical order},
journal={Shape Memory and Superelasticity},
year={2015}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2015$n2015 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/15315 3000 Krooß, Philipp 3010 Kadletz, Peter M. 3010 Somsen, Christoph 3010 Gutmann, Matthias Josef 3010 Chumlyakov, Yuriy I. 3010 Schmahl, Wolfgang Wilhelm 3010 Maier, Hans Jürgen 3010 Niendorf, Thomas 4000 Cyclic degradation of Co49Ni21Ga30 high-temperature shape memory alloy - On the roles of dislocation activity and chemical order / Krooß, Philipp 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/15315=x R 4204 \$dAufsatz 4170 5550 {{Memory-Legierung}} 5550 {{Hochtemperaturverhalten}} 5550 {{Martensitumwandlung}} 5550 {{Degradation <Technik>}} 5550 {{Pseudoelastizität}} 7136 ##0##http://hdl.handle.net/123456789/15315
2023-12-21T11:31:38Z 2023-12-21T11:31:38Z 2015 doi:10.17170/kobra-202312219261 http://hdl.handle.net/123456789/15315 This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. eng Urheberrechtlich geschützt https://rightsstatements.org/page/InC/1.0/ shape memory alloy (SMA) martensitic phase transformation functional degradation martensite stabilization superelasticity 620 660 Cyclic degradation of Co49Ni21Ga30 high-temperature shape memory alloy - On the roles of dislocation activity and chemical order Aufsatz Conventional shape memory alloys (SMAs), such as binary Ni-Ti, are typically limited to service temperatures below 100 °C. Recent studies on Co-Ni-Ga high temperature (HT) SMAs revealed the potential that these alloys can be used up to temperatures of about 400 °C. Analysis of the cyclic functional properties showed that degradation in these alloys is mainly triggered by intensive dislocation motion. However, data on the cyclic stress-strain response and the mechanisms leading to functional degradation of Co-Ni-Ga above 300 °C were missing in open literature. Current results reveal that above 300 °C diffusion controlled mechanisms, e.g. precipitation of secondary phases and changes in the chemical degree of order, seem to dictate cyclic instability. Detailed neutron and transmission electron microscopy analyses following superelstic cycling in a temperature range of 200 °C to 400 °C were employed to characterize the changes in degradation behaviour above 300 °C. open access Krooß, Philipp Kadletz, Peter M. Somsen, Christoph Gutmann, Matthias Josef Chumlyakov, Yuriy I. Schmahl, Wolfgang Wilhelm Maier, Hans Jürgen Niendorf, Thomas doi:10.1007/s40830-015-0049-5 Memory-Legierung Hochtemperaturverhalten Martensitumwandlung Degradation <Technik> Pseudoelastizität acceptedVersion eissn:2199-3858 Issue 1 Shape Memory and Superelasticity 37-49 Volume 2 false
The following license files are associated with this item:
:Urheberrechtlich geschützt