TY - GEN
T1 - Influence of Strain Amplitude on the Functional Properties and Aging at Room Temperature of a Superelastic NiTi Alloy
AU - Rodrigues, Mariana Carla Mendes
AU - Soares, Guilherme Corrêa
AU - Santos, Leandro de Arruda
N1 - Funding Information:
The authors thank the partial support from CAPES/PROEX, PRPq-UFMG, CNPq and FAPEMIG.
Publisher Copyright:
© 2018 Trans Tech Publications, Switzerland.
PY - 2018
Y1 - 2018
N2 - The effects of strain amplitude variation on the functional properties of a superelastic NiTi wire were investigated in terms of critical stress to induce martensite, accumulated residual strain, dissipated energy, lower plateau stress, and stress at maximum strain. Wire specimens were subjected to training by pseudoelastic cycling, being mechanically strained up to strain amplitudes of 4, 6, 8, 10, 12 and 14%. A total of 20 cycles were performed at each condition at room temperature and strain rate of 10-3 s-1. In order to assess if the wires were able to maintain stable their functional properties after training, samples subjected to cycling at 8 and 14% strain amplitudes were aged at room temperature and retested. The results showed that the functional properties tend to stabilize faster when the alloy is subjected to lower strain amplitudes. It was observed that part of the functional properties was recovered if aged at room temperature.
AB - The effects of strain amplitude variation on the functional properties of a superelastic NiTi wire were investigated in terms of critical stress to induce martensite, accumulated residual strain, dissipated energy, lower plateau stress, and stress at maximum strain. Wire specimens were subjected to training by pseudoelastic cycling, being mechanically strained up to strain amplitudes of 4, 6, 8, 10, 12 and 14%. A total of 20 cycles were performed at each condition at room temperature and strain rate of 10-3 s-1. In order to assess if the wires were able to maintain stable their functional properties after training, samples subjected to cycling at 8 and 14% strain amplitudes were aged at room temperature and retested. The results showed that the functional properties tend to stabilize faster when the alloy is subjected to lower strain amplitudes. It was observed that part of the functional properties was recovered if aged at room temperature.
KW - Aging at room temperature
KW - Functional properties
KW - NiTi
KW - Strain amplitude
UR - http://www.scopus.com/inward/record.url?scp=85055103063&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.930.380
DO - 10.4028/www.scientific.net/MSF.930.380
M3 - Conference article in proceedings
AN - SCOPUS:85055103063
SN - 978-3-03-571288-9
T3 - Materials Science Forum
SP - 380
EP - 385
BT - 22nd Brazilian Conference on Materials Science and Engineering - 22nd CBECIMAT
A2 - Junior, Clodomiro Alves
PB - Trans Tech Publications Ltd
T2 - 22nd Brazilian Conference on Materials Science and Engineering, CBECIMAT 2016
Y2 - 6 November 2016 through 10 November 2016
ER -