Heat treatments and thermomechanical cycling influences on the R-phase in Ti-Ni shape memory alloys
This article studies changes observed on the R-phase thermoelastic behavior in a near-equiatomic Ti-Ni shape memory alloy. Three kinds of procedures have been performed: different treatments, thermomechanical cycling under constant loading in shape memory helical springs and thermal cycling in as-tr...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2010-09-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392010000300008 |
| _version_ | 1818204095836585984 |
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| author | Cezar Henrique Gonzalez Carlos Augusto do Nascimento Oliveira Euclides Apolinário Cabral de Pina Severino Leopoldino Urtiga Filho Oscar Olimpio de Araújo Filho Carlos José de Araújo |
| author_facet | Cezar Henrique Gonzalez Carlos Augusto do Nascimento Oliveira Euclides Apolinário Cabral de Pina Severino Leopoldino Urtiga Filho Oscar Olimpio de Araújo Filho Carlos José de Araújo |
| author_sort | Cezar Henrique Gonzalez |
| collection | DOAJ |
| description | This article studies changes observed on the R-phase thermoelastic behavior in a near-equiatomic Ti-Ni shape memory alloy. Three kinds of procedures have been performed: different treatments, thermomechanical cycling under constant loading in shape memory helical springs and thermal cycling in as-treated and trained samples. Several heat treatments were carried out to investigate evolution of the R-phase by differential scanning calorimetry (DSC). A heat treatment was chosen on which R-phase is absent. Shape memory springs were produced and submitted to a training process in an apparatus by tensioning the springs under constant loading. Thermal cycling in DSC was realized in as-treated and trained samples. Several aspects of one-step (B2→B19') and two-steps (B2→R→B19') martensitic transformations and R-phase formation and their evolution during tests were observed and discussed. |
| first_indexed | 2024-12-12T03:35:48Z |
| format | Article |
| id | doaj.art-73c6c5599bee44c19e8ec609259f291f |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-12T03:35:48Z |
| publishDate | 2010-09-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-73c6c5599bee44c19e8ec609259f291f2022-12-22T00:39:49ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392010-09-0113332533110.1590/S1516-14392010000300008Heat treatments and thermomechanical cycling influences on the R-phase in Ti-Ni shape memory alloysCezar Henrique GonzalezCarlos Augusto do Nascimento OliveiraEuclides Apolinário Cabral de PinaSeverino Leopoldino Urtiga FilhoOscar Olimpio de Araújo FilhoCarlos José de AraújoThis article studies changes observed on the R-phase thermoelastic behavior in a near-equiatomic Ti-Ni shape memory alloy. Three kinds of procedures have been performed: different treatments, thermomechanical cycling under constant loading in shape memory helical springs and thermal cycling in as-treated and trained samples. Several heat treatments were carried out to investigate evolution of the R-phase by differential scanning calorimetry (DSC). A heat treatment was chosen on which R-phase is absent. Shape memory springs were produced and submitted to a training process in an apparatus by tensioning the springs under constant loading. Thermal cycling in DSC was realized in as-treated and trained samples. Several aspects of one-step (B2→B19') and two-steps (B2→R→B19') martensitic transformations and R-phase formation and their evolution during tests were observed and discussed.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392010000300008shape memory springheat treatmentsR-phaseti-ni alloys and thermoelastic properties |
| spellingShingle | Cezar Henrique Gonzalez Carlos Augusto do Nascimento Oliveira Euclides Apolinário Cabral de Pina Severino Leopoldino Urtiga Filho Oscar Olimpio de Araújo Filho Carlos José de Araújo Heat treatments and thermomechanical cycling influences on the R-phase in Ti-Ni shape memory alloys Materials Research shape memory spring heat treatments R-phase ti-ni alloys and thermoelastic properties |
| title | Heat treatments and thermomechanical cycling influences on the R-phase in Ti-Ni shape memory alloys |
| title_full | Heat treatments and thermomechanical cycling influences on the R-phase in Ti-Ni shape memory alloys |
| title_fullStr | Heat treatments and thermomechanical cycling influences on the R-phase in Ti-Ni shape memory alloys |
| title_full_unstemmed | Heat treatments and thermomechanical cycling influences on the R-phase in Ti-Ni shape memory alloys |
| title_short | Heat treatments and thermomechanical cycling influences on the R-phase in Ti-Ni shape memory alloys |
| title_sort | heat treatments and thermomechanical cycling influences on the r phase in ti ni shape memory alloys |
| topic | shape memory spring heat treatments R-phase ti-ni alloys and thermoelastic properties |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392010000300008 |
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