Transformation of the TiNi Alloy Microstructure and the Mechanical Properties Caused by Repeated B2-B19′ Martensitic Transformations

Churakova, Anna; Гундеров, Д. В.; Lukyanov, A.; Nollmann, Niklas

doi:10.1007/s40195-015-0317-6

Cited by 26 publications

(17 citation statements)

References 12 publications

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“…Usage of titanium alloys is continuously increasing in biomedical applications due to their high biocompatibility and good mechanical properties compared to conventional biomaterials [1][2][3][4][5][6][7]. Due to their excellent properties, they have also been applied to aerospace industry, petroleum industry and also in medicine [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Replacing Vanadium by Niobium and Iron on the Tribological Behavior of HIPed Titanium Alloys

Fellah

Aissani

Samad

et al. 2017

Acta Metall. Sin. (Engl. Lett.)

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This study aims to examine the effect of replacing vanadium by niobium and iron on the tribological behavior of hot-isostatic-pressed titanium alloy (Ti-6Al-4V) biomaterial, using a ball-on-disk-type oscillating tribometer, under wet conditions using physiological solution in accordance with the ISO7148 standards. The tests were carried out under a normal load of 6 N, with an AISI 52100 grade steel ball as a counter face. The morphological changes and structural evolution of the nanoparticle powders using different milling times (2, 6, 12 and 18 h) were studied. The morphological characterization indicated that the particle and crystallite size continuously decrease with increasing milling time to reach the lowest value of 4 nm at 18-h milling. The friction coefficient and wear rate were lower in the samples milled at 18 h (0.226, 0.297 and 0.423; and 0.66 9 10 -2 , 0.87 9 10 -2 and 1.51 9 10 -2 lm 3 N -1 lm -1 ) for Ti-6Al-4Fe, Ti-6Al-7Nb and Ti-6Al-4V, respectively. This improvement in friction and wear resistance is attributed to the grain refinement at 18-h milling. The Ti-6Al-4Fe samples showed good tribological performance for all milling times.

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Section: Introductionmentioning

confidence: 99%

Effect of Replacing Vanadium by Niobium and Iron on the Tribological Behavior of HIPed Titanium Alloys

Fellah

Aissani

Samad

et al. 2017

Acta Metall. Sin. (Engl. Lett.)

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“…Ces contraintes favorisent la propagation de fissures internes qui débouchent en surface. Quant aux fissures de subsurface, localisées sous la zone hertzienne, elles avancent parallèlement à l'interface de contact durant le glissement [46]. Deux phénomènes peuvent expliquer la formation de petits copeaux : la rupture de la couche de transfert ou la rupture dans une subsurface des métaux en présence.…”

Section: Influence Des Paramètres Opératoiresunclassified

Comportement à l’usure et au frottement de deux biomatériaux AISI 316L et Ti-6Al-7Nb pour prothèse totale de hanche

Fellah

Aissani

Iost

et al. 2018

Matériaux & Techniques

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On s’est intéressé dans ce travail à l’analyse du comportement à l’usure et au frottement de deux prothèses totales de hanche en acier AISI 316L et en alliage à base de titane Ti-6Al-7Nb. Les propriétés tribologiques d’usure par glissement sont évaluées à l’aide d’un tribomètre TriboTechnic muni du logiciel tribotester, en accord avec les standards ASTM G 133–95, ISO 7148-1:2012 et ASTMG 99, en présence d’un milieu physiologique (solution de Hank) à une température de 28 à 30 °C. La bille en alumine (Al2O3) a été choisie comme antagoniste. Trois vitesses (1, 6 et 15 mm.s−1) et quatre forces normales (2,4,6 et 10 N) ont été appliquées. Après chaque essai de frottement, l’état de surface a été analysé par un microscope électronique à balayage. Le coefficient de frottement et le volume d’usure étaient plus faibles dans les échantillons testés à une force appliquée de 2 N sous une vitesse de 1 mm.s−1 (0,12 et 0,33) et (0,07 × 107 et 0,09 × 107 μm3) pour l’acier AISI 316L et le Ti-6Al-7Nb, respectivement. Les valeurs du coefficient de frottement obtenues respectent les normes imposées par le domaine du biomédical notamment au niveau de l’état de surface articulaire des prothèses de hanche.

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“…The work [14] showed the effect on the microstructure of the TiNi alloy of multiple martensitic transformations in various states, but the nature of fracture and fractography in these materials after these treatments were ignored. In this work, we studied the mechanical behavior and fractography after various treatments.…”

Section: Introductionmentioning

confidence: 99%

Mechanical behavior and fractographic analysis of a TiNi alloy with various thermomechanical treatment

et al. 2019

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Influence of thermomechanical treatment (deformation, thermal cycling treatment in the temperature range of martensitic transformations B2-B19’) on the TiNi alloys’ mechanical behaviour and fracture was studied. Different states were considered, they are initial coarse-grained (CG), ultrafine-grained (UFG) after ECAP (with a grain size of 200 nm), the state after ECAP and cold upsetting by 30% - UFG state with high dislocation density. It was shown that thermal cycling causes some increase in dislocation density, strength and microhardness in all the states. Thermal cycling of UFG alloys allows forming the states with non-equilibrium grain boundaries, with additional dislocations of “phase hardening”. The nature of the fracture was analysed in the TiNi alloy in various states.

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Transformation of the TiNi Alloy Microstructure and the Mechanical Properties Caused by Repeated B2-B19′ Martensitic Transformations

Cited by 26 publications

References 12 publications

Effect of Replacing Vanadium by Niobium and Iron on the Tribological Behavior of HIPed Titanium Alloys

Effect of Replacing Vanadium by Niobium and Iron on the Tribological Behavior of HIPed Titanium Alloys

Comportement à l’usure et au frottement de deux biomatériaux AISI 316L et Ti-6Al-7Nb pour prothèse totale de hanche

Mechanical behavior and fractographic analysis of a TiNi alloy with various thermomechanical treatment

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