Hydrogen effect on the austenite-martensite transformation of the cycled Ni-Ti alloy
Identifieur interne : 000020 ( PascalFrancis/Corpus ); précédent : 000019; suivant : 000021Hydrogen effect on the austenite-martensite transformation of the cycled Ni-Ti alloy
Auteurs : Fehmi Gamaoun ; Imen Skhiri ; Tarak Bouraoui ; Tarak Ben ZinebSource :
- Journal of intelligent material systems and structures [ 1045-389X ] ; 2014.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Because of its biocompatibility, superelastic Ni-Ti wire alloys have been successfully used in orthodontic clinics. The susceptibility of Ni-Ti shape memory alloys toward hydrogen embrittlement has been examined with respect to the residual stress after a few number of cycles in air at room temperature. Orthodontic wires have been cycled until having an imposed deformation of 2.1%, 4%, and 7.7% between I and 50 cycles and then have cathodically been charged by hydrogen with a current density of 10 A/m2 for 4 h in a 0.9% NaCl aqueous solution at room temperature. Throughout cycling, a residual strain has been formed and has increased by the number of cycles and the value of the imposed deformation. After hydrogen charging, the critical stress enhances when the number of cycles is great and the value of the imposed deformation is high. In addition, an embrittlement occurs for the specimen submitted to 50 and 30 cycles with an imposed strain of 2.1% and 4%, respectively. Nevertheless, no embrittlement has been detected after 50 cycles until 7.7% of the imposed deformation. The results of this study imply that the embrittlement could be related to the discontinuity in the distribution of defects created by partial superelastic cycling.
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Format Inist (serveur)
NO : | PASCAL 14-0194431 INIST |
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ET : | Hydrogen effect on the austenite-martensite transformation of the cycled Ni-Ti alloy |
AU : | GAMAOUN (Fehmi); SKHIRI (Imen); BOURAOUI (Tarak); BEN ZINEB (Tarak) |
AF : | Laboratory of Mechanics of Sousse, University of Sousse/Sahloul/Tunisie (1 aut.); Departement of Advanced Mechanics, National Engineering School of Sousse, University of Sousse/Sahloul/Tunisie (1 aut.); Laboratoire des Systèmes Electromécaniques (LASEM), ENIS/Sfax/Tunisie (2 aut.); Laboratory of Mechanical Engineering of Monastir, University of Monastir/Monastir/Tunisie (3 aut.); Departement of Mechanics, National Engineering School of Monastir (ENIM), University of Monastir/Monastir/Tunisie (3 aut.); Université de Lorraine, 2 rue Jean Lamour/Vandoeuvre-Lés-Nancy, 54500/France (4 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Journal of intelligent material systems and structures; ISSN 1045-389X; Royaume-Uni; Da. 2014; Vol. 25; No. 8; Pp. 980-988; Bibl. 3/4 p. |
LA : | Anglais |
EA : | Because of its biocompatibility, superelastic Ni-Ti wire alloys have been successfully used in orthodontic clinics. The susceptibility of Ni-Ti shape memory alloys toward hydrogen embrittlement has been examined with respect to the residual stress after a few number of cycles in air at room temperature. Orthodontic wires have been cycled until having an imposed deformation of 2.1%, 4%, and 7.7% between I and 50 cycles and then have cathodically been charged by hydrogen with a current density of 10 A/m2 for 4 h in a 0.9% NaCl aqueous solution at room temperature. Throughout cycling, a residual strain has been formed and has increased by the number of cycles and the value of the imposed deformation. After hydrogen charging, the critical stress enhances when the number of cycles is great and the value of the imposed deformation is high. In addition, an embrittlement occurs for the specimen submitted to 50 and 30 cycles with an imposed strain of 2.1% and 4%, respectively. Nevertheless, no embrittlement has been detected after 50 cycles until 7.7% of the imposed deformation. The results of this study imply that the embrittlement could be related to the discontinuity in the distribution of defects created by partial superelastic cycling. |
CC : | 001B00G07T; 001B40F30R |
FD : | Déformation mécanique; Hydrogène; Transformation phase; Alliage base nickel; Biocompatibilité; Nitinol; Fil métallique; Dentisterie; Alliage mémoire forme; Fragilisation hydrogène |
ED : | Strains; Hydrogen; Phase transformations; Nickel base alloys; Biocompatibility; Nitinol; Wire; Dentistry; Shape memory alloy; Hydrogen embrittlement |
SD : | Biocompatibilidad; Hilo metálico; Aleación memoria forma |
LO : | INIST-22109.354000507540930050 |
ID : | 14-0194431 |
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Pascal:14-0194431Le document en format XML
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<series><title level="j" type="main">Journal of intelligent material systems and structures</title>
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<front><div type="abstract" xml:lang="en">Because of its biocompatibility, superelastic Ni-Ti wire alloys have been successfully used in orthodontic clinics. The susceptibility of Ni-Ti shape memory alloys toward hydrogen embrittlement has been examined with respect to the residual stress after a few number of cycles in air at room temperature. Orthodontic wires have been cycled until having an imposed deformation of 2.1%, 4%, and 7.7% between I and 50 cycles and then have cathodically been charged by hydrogen with a current density of 10 A/m<sup>2</sup>
for 4 h in a 0.9% NaCl aqueous solution at room temperature. Throughout cycling, a residual strain has been formed and has increased by the number of cycles and the value of the imposed deformation. After hydrogen charging, the critical stress enhances when the number of cycles is great and the value of the imposed deformation is high. In addition, an embrittlement occurs for the specimen submitted to 50 and 30 cycles with an imposed strain of 2.1% and 4%, respectively. Nevertheless, no embrittlement has been detected after 50 cycles until 7.7% of the imposed deformation. The results of this study imply that the embrittlement could be related to the discontinuity in the distribution of defects created by partial superelastic cycling.</div>
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<server><NO>PASCAL 14-0194431 INIST</NO>
<ET>Hydrogen effect on the austenite-martensite transformation of the cycled Ni-Ti alloy</ET>
<AU>GAMAOUN (Fehmi); SKHIRI (Imen); BOURAOUI (Tarak); BEN ZINEB (Tarak)</AU>
<AF>Laboratory of Mechanics of Sousse, University of Sousse/Sahloul/Tunisie (1 aut.); Departement of Advanced Mechanics, National Engineering School of Sousse, University of Sousse/Sahloul/Tunisie (1 aut.); Laboratoire des Systèmes Electromécaniques (LASEM), ENIS/Sfax/Tunisie (2 aut.); Laboratory of Mechanical Engineering of Monastir, University of Monastir/Monastir/Tunisie (3 aut.); Departement of Mechanics, National Engineering School of Monastir (ENIM), University of Monastir/Monastir/Tunisie (3 aut.); Université de Lorraine, 2 rue Jean Lamour/Vandoeuvre-Lés-Nancy, 54500/France (4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Journal of intelligent material systems and structures; ISSN 1045-389X; Royaume-Uni; Da. 2014; Vol. 25; No. 8; Pp. 980-988; Bibl. 3/4 p.</SO>
<LA>Anglais</LA>
<EA>Because of its biocompatibility, superelastic Ni-Ti wire alloys have been successfully used in orthodontic clinics. The susceptibility of Ni-Ti shape memory alloys toward hydrogen embrittlement has been examined with respect to the residual stress after a few number of cycles in air at room temperature. Orthodontic wires have been cycled until having an imposed deformation of 2.1%, 4%, and 7.7% between I and 50 cycles and then have cathodically been charged by hydrogen with a current density of 10 A/m<sup>2</sup>
for 4 h in a 0.9% NaCl aqueous solution at room temperature. Throughout cycling, a residual strain has been formed and has increased by the number of cycles and the value of the imposed deformation. After hydrogen charging, the critical stress enhances when the number of cycles is great and the value of the imposed deformation is high. In addition, an embrittlement occurs for the specimen submitted to 50 and 30 cycles with an imposed strain of 2.1% and 4%, respectively. Nevertheless, no embrittlement has been detected after 50 cycles until 7.7% of the imposed deformation. The results of this study imply that the embrittlement could be related to the discontinuity in the distribution of defects created by partial superelastic cycling.</EA>
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<ED>Strains; Hydrogen; Phase transformations; Nickel base alloys; Biocompatibility; Nitinol; Wire; Dentistry; Shape memory alloy; Hydrogen embrittlement</ED>
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