Produção Nacional
Revisado por pares
The influence of carbon content on cyclic fatigue of NiTi SMA wires
2011; Wiley; Volume: 44; Issue: 6 Linguagem: Inglês
10.1111/j.1365-2591.2011.01864.x
ISSN1365-2591
AutoresTibério César Uchôa Matheus, William Marcos Muniz Menezes, Odair Doná Rigo, Leonardo Kyo Kabayama, C. S. C. Viana, Jorge Otubo,
Tópico(s)Dental materials and restorations
ResumoInternational Endodontic JournalVolume 44, Issue 6 p. 567-573 The influence of carbon content on cyclic fatigue of NiTi SMA wires T. C. U. Matheus, T. C. U. Matheus Instituto Tecnologico de Aeronautica-ITA, Sao Paulo Instituto Militar de Engenharia-IME, Rio de JaneiroSearch for more papers by this authorW. M. M. Menezes, W. M. M. Menezes Instituto Tecnologico de Aeronautica-ITA, Sao PauloSearch for more papers by this authorO. D. Rigo, O. D. Rigo Instituto Tecnologico de Aeronautica-ITA, Sao PauloSearch for more papers by this authorL. K. Kabayama, L. K. Kabayama Instituto Tecnologico de Aeronautica-ITA, Sao PauloSearch for more papers by this authorC. S. C. Viana, C. S. C. Viana Instituto Militar de Engenharia-IME, Rio de Janeiro Universidade Federal Fluminense-UFF, Rio de Janeiro, BrazilSearch for more papers by this authorJ. Otubo, J. Otubo Instituto Tecnologico de Aeronautica-ITA, Sao PauloSearch for more papers by this author T. C. U. Matheus, T. C. U. Matheus Instituto Tecnologico de Aeronautica-ITA, Sao Paulo Instituto Militar de Engenharia-IME, Rio de JaneiroSearch for more papers by this authorW. M. M. Menezes, W. M. M. Menezes Instituto Tecnologico de Aeronautica-ITA, Sao PauloSearch for more papers by this authorO. D. Rigo, O. D. Rigo Instituto Tecnologico de Aeronautica-ITA, Sao PauloSearch for more papers by this authorL. K. Kabayama, L. K. Kabayama Instituto Tecnologico de Aeronautica-ITA, Sao PauloSearch for more papers by this authorC. S. C. Viana, C. S. C. Viana Instituto Militar de Engenharia-IME, Rio de Janeiro Universidade Federal Fluminense-UFF, Rio de Janeiro, BrazilSearch for more papers by this authorJ. Otubo, J. Otubo Instituto Tecnologico de Aeronautica-ITA, Sao PauloSearch for more papers by this author First published: 14 February 2011 https://doi.org/10.1111/j.1365-2591.2011.01864.xCitations: 3 T. C. U. Matheus, Instituto Tecnologico de Aeronautica. Praça Marechal Eduardo Gomes, 50, Vila das Acacias, CEP: 12228-900, Sao Jose dos Campos, Sao Paulo, Brazil (Tel.: +55 12 39475905; fax: +55 12 39475906; e-mail: tcmatheus@yahoo.com.br). Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Matheus TCU, Menezes WMM, Rigo OD, Kabayama LK, Viana CSC, Otubo J. The influence of carbon content on cyclic fatigue of NiTi SMA wires. International Endodontic Journal, 44, 567–573, 2011. Abstract Aim To evaluate two NiTi wires with different carbon and oxygen contents in terms of mechanical resistance to rotary bending fatigue (RBF) under varied parameters of strain amplitude and rotational speed. Methodology The wires produced from two vacuum induction melting (VIM) processed NiTi ingots were tested, Ti-49.81at%Ni and Ti-50.33at%Ni, named VIM 1 and VIM 2. A brief analysis related to wire fabrication is also presented, as well as chemical and microstructural analysis by energy dispersive spectroscopy (EDS) and optical microscope, respectively. A computer controlled RBF machine was specially constructed for the tests. Three radii of curvature were used: 50.0, 62.5 and 75.0 mm, respectively, R1, R2 and R3, resulting in three strain amplitudes εa: 1.00%, 0.80% and 0.67%. The selected rotational speeds were 250 and 455 rpm. Results The VIM 1 wire had a high carbon content of 0.188 wt% and a low oxygen content of 0.036 wt%. The oxygen and carbon contents of wire VIM 2 did not exceed their maximum, of 0.070 and 0.050 wt%, according to ASTM standard (ASTM F-2063-00 2001). The wire with lower carbon content performed better when compared to the one with higher carbon content, withstanding 29 441 and 12 895 cycles, respectively, to fracture. Conclusions The surface quality of the wire was associated with resistance to cyclic fatigue. Surface defects acted as stress concentrators points. Overall, the number of cycles to failure was higher for VIM 2 wires with lower carbon content. Citing Literature Volume44, Issue6June 2011Pages 567-573 RelatedInformation
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