Factors influencing the elastic moduli, reversible strains and hysteresis loops in martensitic Ti–Nb alloys

Bönisch, Matthias; Calin, Mariana; Humbeeck, Jan Van; Skrotzki, Werner; Eckert, J.

doi:10.1016/j.msec.2014.12.048

Cited by 69 publications

(32 citation statements)

References 43 publications

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“…The martensite plates exhibited a thickness of up to 15 µm and lengths of up to several 100 µm, in some cases cutting across entire β grains. The present alloys exhibit yield strengths and Young’s moduli between 400 – 660 MPa and 65 – 83 GPa, respectively, and can be plastically deformed to more than 20% 4 , 5 , 23 .…”

Section: Resultsmentioning

confidence: 86%

“…In particular the class of β-stabilized Ti-alloys represents highly promising multifunctional materials with desirable structural and functional properties for various biomedical and engineering applications 1 – 3 . Certain alloy compositions display low Young’s moduli ( E ) below 80 GPa after rapid cooling 4 , 5 , providing suitable starting points for the development of novel low-modulus alloys for load-bearing implant applications. Due to their high strength to density ratio β-stabilized Ti-alloys have also become increasingly used for various aerospace applications such as airframes and landing gears 3 .…”

Section: Introductionmentioning

confidence: 99%

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Giant thermal expansion and α-precipitation pathways in Ti-alloys

et al. 2017

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Ti-alloys represent the principal structural materials in both aerospace development and metallic biomaterials. Key to optimizing their mechanical and functional behaviour is in-depth know-how of their phases and the complex interplay of diffusive vs. displacive phase transformations to permit the tailoring of intricate microstructures across a wide spectrum of configurations. Here, we report on structural changes and phase transformations of Ti–Nb alloys during heating by in situ synchrotron diffraction. These materials exhibit anisotropic thermal expansion yielding some of the largest linear expansion coefficients (+ 163.9×10−6 to −95.1×10−6 °C−1) ever reported. Moreover, we describe two pathways leading to the precipitation of the α-phase mediated by diffusion-based orthorhombic structures, α″lean and α″iso. Via coupling the lattice parameters to composition both phases evolve into α through rejection of Nb. These findings have the potential to promote new microstructural design approaches for Ti–Nb alloys and β-stabilized Ti-alloys in general.

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Section: Resultsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Giant thermal expansion and α-precipitation pathways in Ti-alloys

et al. 2017

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“…Among the β-type Ti-based materials, binary Ti-Nb alloys have attracted particular attention due to their low stiffness and superelasticity related to the stress-induced martensitic transformation [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Ni-free superelastic binary Ti–Nb coatings obtained by DC magnetron co-sputtering

Achache

Lamri

Yazdi

et al. 2015

Surface and Coatings Technology

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“…Nb also increase the resistance of Ti to oxidation and contributes to decrease of oxygen solubility and further oxygen diffusion into the alloy (Han et al, 2015). These properties make Ti-Nb alloys faithful and possible candidate biomedical materials for replacing frequently used commercial Ti6Al4V and TiNi alloys (Kim et al, 2006;Wang and Zheng 2009;McMahon et al, 2012;Kent et al, 2013;Andrade et al, 2015;Bönisch et al, 2015;Prokoshkin et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Sıcak Presleme Ve Yüksek Sıcaklık Sinterleme Kombinasyonu İle Β Tipi Biyomedikal Ti74Nb26 Alaşımının Üretimi

Aydoğmuş

Al-Zangana

Kelen

2020

Konya Journal of Engineering Sciences

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Titanium (Ti)-Niobium (Nb) alloys are generally produced by casting methods. Since the melting temperatures of pure Ti and Nb are quite high, their fabrication by casting techniques is costly. On the other hand, it is possible to produce these alloys economically at much lower temperatures (less than melting temperature of Ti), completely in solid state using powder metallurgy. In the present study, Ti74Nb26 alloys were produced using pure Ti and pure Nb powders by combination of hot pressing and high temperature sintering for the first time. The influences of processing temperature and time on density, microstructure, and mechanical behavior were investigated. Density measurements showed that hot pressing at 800 °C provided full density. XRD and SEM investigations revealed that amount of β phase formed increased with increasing sintering time. In addition to main phase β, little amount of α phase and a very small amount of pure Nb were observed in the microstructure. Mechanical properties were measured by means of uniaxial compression and micro Vickers indentation tests. The results indicated that 4 h of sintering at 1200 °C exhibited the highest value of hardness (336 HV), elastic modulus (44 GPa), yield strength (894 MPa), and compressive strength (1178 MPa).

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Factors influencing the elastic moduli, reversible strains and hysteresis loops in martensitic Ti–Nb alloys

Cited by 69 publications

References 43 publications

Giant thermal expansion and α-precipitation pathways in Ti-alloys

Giant thermal expansion and α-precipitation pathways in Ti-alloys

Ni-free superelastic binary Ti–Nb coatings obtained by DC magnetron co-sputtering

Sıcak Presleme Ve Yüksek Sıcaklık Sinterleme Kombinasyonu İle Β Tipi Biyomedikal Ti74Nb26 Alaşımının Üretimi

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